| /******************************************************************************* |
| * Copyright (c) 2000, 2018 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.gtk.*; |
| import org.eclipse.swt.internal.gtk3.*; |
| import org.eclipse.swt.internal.gtk4.*; |
| |
| /** |
| * Instances of this class represent a selectable user interface |
| * object that displays a list of strings and issues notification |
| * when a string is selected. A list may be single or multi select. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>SINGLE, MULTI</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Selection, DefaultSelection</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of SINGLE and MULTI may be specified. |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/snippets/#list">List snippets</a> |
| * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a> |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class List extends Scrollable { |
| long modelHandle; |
| int topIndex; |
| int selectionCountOnPress,selectionCountOnRelease; |
| |
| static final int TEXT_COLUMN = 0; |
| double cachedAdjustment, currentAdjustment; |
| boolean rowActivated; |
| |
| /** |
| * Constructs a new instance of this class given its parent |
| * and a style value describing its behavior and appearance. |
| * <p> |
| * The style value is either one of the style constants defined in |
| * class <code>SWT</code> which is applicable to instances of this |
| * class, or must be built by <em>bitwise OR</em>'ing together |
| * (that is, using the <code>int</code> "|" operator) two or more |
| * of those <code>SWT</code> style constants. The class description |
| * lists the style constants that are applicable to the class. |
| * Style bits are also inherited from superclasses. |
| * </p> |
| * |
| * @param parent a composite control which will be the parent of the new instance (cannot be null) |
| * @param style the style of control to construct |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
| * </ul> |
| * |
| * @see SWT#SINGLE |
| * @see SWT#MULTI |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public List (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| |
| /** |
| * Adds the argument to the end of the receiver's list. |
| * <p> |
| * Note: If control characters like '\n', '\t' etc. are used |
| * in the string, then the behavior is platform dependent. |
| * </p> |
| * @param string the new item |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #add(String,int) |
| */ |
| public void add (String string) { |
| checkWidget(); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| byte [] buffer = Converter.wcsToMbcs (string, true); |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| if (iter == 0) error (SWT.ERROR_ITEM_NOT_ADDED); |
| GTK.gtk_list_store_append (modelHandle, iter); |
| GTK.gtk_list_store_set (modelHandle, iter, TEXT_COLUMN, buffer, -1); |
| OS.g_free (iter); |
| } |
| |
| /** |
| * Adds the argument to the receiver's list at the given |
| * zero-relative index. |
| * <p> |
| * Note: To add an item at the end of the list, use the |
| * result of calling <code>getItemCount()</code> as the |
| * index or use <code>add(String)</code>. |
| * </p><p> |
| * Also note, if control characters like '\n', '\t' etc. are used |
| * in the string, then the behavior is platform dependent. |
| * </p> |
| * |
| * @param string the new item |
| * @param index the index for the item |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list (inclusive)</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #add(String) |
| */ |
| public void add (String string, int index) { |
| checkWidget(); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| int count = GTK.gtk_tree_model_iter_n_children (modelHandle, 0); |
| if (!(0 <= index && index <= count)) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| byte [] buffer = Converter.wcsToMbcs (string, true); |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| if (iter == 0) error (SWT.ERROR_ITEM_NOT_ADDED); |
| /* |
| * Feature in GTK. It is much faster to append to a list store |
| * than to insert at the end using gtk_list_store_insert(). |
| */ |
| if (index == count) { |
| GTK.gtk_list_store_append (modelHandle, iter); |
| } else { |
| GTK.gtk_list_store_insert (modelHandle, iter, index); |
| } |
| GTK.gtk_list_store_set (modelHandle, iter, TEXT_COLUMN, buffer, -1); |
| OS.g_free (iter); |
| } |
| |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when the user changes the receiver's selection, by sending |
| * it one of the messages defined in the <code>SelectionListener</code> |
| * interface. |
| * <p> |
| * <code>widgetSelected</code> is called when the selection changes. |
| * <code>widgetDefaultSelected</code> is typically called when an item is double-clicked. |
| * </p> |
| * |
| * @param listener the listener which should be notified when the user changes the receiver's selection |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see SelectionListener |
| * @see #removeSelectionListener |
| * @see SelectionEvent |
| */ |
| public void addSelectionListener(SelectionListener listener) { |
| checkWidget(); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| TypedListener typedListener = new TypedListener (listener); |
| addListener (SWT.Selection,typedListener); |
| addListener (SWT.DefaultSelection,typedListener); |
| } |
| |
| static int checkStyle (int style) { |
| return checkBits (style, SWT.SINGLE, SWT.MULTI, 0, 0, 0, 0); |
| } |
| |
| @Override |
| void createHandle (int index) { |
| state |= HANDLE; |
| fixedHandle = OS.g_object_new (display.gtk_fixed_get_type (), 0); |
| if (fixedHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| |
| if (GTK.GTK4) { |
| scrolledHandle = GTK4.gtk_scrolled_window_new(); |
| } else { |
| GTK.gtk_widget_set_has_window(fixedHandle, true); |
| scrolledHandle = GTK3.gtk_scrolled_window_new (0, 0); |
| } |
| if (scrolledHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| /* |
| * Columns: |
| * 0 - text |
| */ |
| long [] types = new long [] {OS.G_TYPE_STRING ()}; |
| modelHandle = GTK.gtk_list_store_newv (types.length, types); |
| if (modelHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| handle = GTK.gtk_tree_view_new_with_model (modelHandle); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| long textRenderer = GTK.gtk_cell_renderer_text_new (); |
| if (textRenderer == 0) error (SWT.ERROR_NO_HANDLES); |
| long columnHandle = GTK.gtk_tree_view_column_new (); |
| if (columnHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| GTK.gtk_tree_view_column_pack_start (columnHandle, textRenderer, true); |
| GTK.gtk_tree_view_column_add_attribute (columnHandle, textRenderer, OS.text, TEXT_COLUMN); |
| GTK.gtk_tree_view_column_set_min_width (columnHandle, 0); |
| GTK.gtk_tree_view_insert_column (handle, columnHandle, index); |
| |
| if (GTK.GTK4) { |
| OS.swt_fixed_add(fixedHandle, scrolledHandle); |
| GTK4.gtk_scrolled_window_set_child(scrolledHandle, handle); |
| } else { |
| GTK3.gtk_container_add (fixedHandle, scrolledHandle); |
| GTK3.gtk_container_add (scrolledHandle, handle); |
| } |
| |
| int mode = (style & SWT.MULTI) != 0 ? GTK.GTK_SELECTION_MULTIPLE : GTK.GTK_SELECTION_BROWSE; |
| long selectionHandle = GTK.gtk_tree_view_get_selection (handle); |
| GTK.gtk_tree_selection_set_mode (selectionHandle, mode); |
| GTK.gtk_tree_view_set_headers_visible (handle, false); |
| int hsp = (style & SWT.H_SCROLL) != 0 ? GTK.GTK_POLICY_AUTOMATIC : GTK.GTK_POLICY_NEVER; |
| int vsp = (style & SWT.V_SCROLL) != 0 ? GTK.GTK_POLICY_AUTOMATIC : GTK.GTK_POLICY_NEVER; |
| GTK.gtk_scrolled_window_set_policy (scrolledHandle, hsp, vsp); |
| if ((style & SWT.BORDER) != 0) { |
| if (GTK.GTK4) { |
| GTK4.gtk_scrolled_window_set_has_frame(scrolledHandle, true); |
| } else { |
| GTK3.gtk_scrolled_window_set_shadow_type (scrolledHandle, GTK.GTK_SHADOW_ETCHED_IN); |
| } |
| } |
| /* |
| * Bug in GTK. When a treeview is the child of an override shell, |
| * and if the user has ever invokes the interactive search field, |
| * and the treeview is disposed on a focus out event, it segment |
| * faults. The fix is to disable the search field in an override |
| * shell. |
| */ |
| if ((getShell ().style & SWT.ON_TOP) != 0) { |
| GTK.gtk_tree_view_set_search_column (handle, -1); |
| } |
| // In GTK 3 font description is inherited from parent widget which is not how SWT has always worked, |
| // reset to default font to get the usual behavior |
| setFontDescription(defaultFont().handle); |
| } |
| |
| @Override |
| int applyThemeBackground () { |
| return -1; /* No Change */ |
| } |
| |
| @Override |
| Point computeSizeInPixels (int wHint, int hHint, boolean changed) { |
| checkWidget (); |
| if (wHint != SWT.DEFAULT && wHint < 0) wHint = 0; |
| if (hHint != SWT.DEFAULT && hHint < 0) hHint = 0; |
| GTK.gtk_widget_realize(handle); |
| Point size = computeNativeSize (handle, wHint, hHint, changed); |
| if (size.x == 0 && wHint == SWT.DEFAULT) size.x = DEFAULT_WIDTH; |
| /* |
| * in GTK 3.8 computeNativeSize returning 0 for height. |
| * So if the height is returned as zero calculate the table height |
| * based on the number of items in the table |
| */ |
| if (size.y == 0 && hHint == SWT.DEFAULT) { |
| size.y = getItemCount() * getItemHeightInPixels(); |
| } |
| |
| /* |
| * In case the table doesn't contain any elements, |
| * getItemCount returns 0 and size.y will be 0 |
| * so need to assign default height |
| */ |
| if (size.y == 0 && hHint == SWT.DEFAULT) size.y = DEFAULT_HEIGHT; |
| Rectangle trim = computeTrimInPixels (0, 0, size.x, size.y); |
| size.x = trim.width; |
| size.y = trim.height; |
| return size; |
| } |
| |
| @Override |
| GdkRGBA defaultBackground () { |
| return display.getSystemColor(SWT.COLOR_LIST_BACKGROUND).handle; |
| } |
| |
| @Override |
| void deregister() { |
| super.deregister (); |
| display.removeWidget (GTK.gtk_tree_view_get_selection (handle)); |
| } |
| |
| /** |
| * Deselects the item at the given zero-relative index in the receiver. |
| * If the item at the index was already deselected, it remains |
| * deselected. Indices that are out of range are ignored. |
| * |
| * @param index the index of the item to deselect |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void deselect (int index) { |
| checkWidget(); |
| if (!(0 <= index && index < GTK.gtk_tree_model_iter_n_children (modelHandle, 0))) return; |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| GTK.gtk_tree_selection_unselect_iter (selection, iter); |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| OS.g_free (iter); |
| } |
| |
| /** |
| * Deselects the items at the given zero-relative indices in the receiver. |
| * If the item at the given zero-relative index in the receiver |
| * is selected, it is deselected. If the item at the index |
| * was not selected, it remains deselected. The range of the |
| * indices is inclusive. Indices that are out of range are ignored. |
| * |
| * @param start the start index of the items to deselect |
| * @param end the end index of the items to deselect |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void deselect (int start, int end) { |
| checkWidget(); |
| if (start < 0 && end < 0) return; |
| int count = GTK.gtk_tree_model_iter_n_children (modelHandle, 0); |
| if (start >= count && end >= count) return; |
| start = Math.min (count - 1, Math.max (0, start)); |
| end = Math.min (count - 1, Math.max (0, end)); |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| for (int index=start; index<=end; index++) { |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| GTK.gtk_tree_selection_unselect_iter (selection, iter); |
| } |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| OS.g_free (iter); |
| } |
| |
| /** |
| * Deselects the items at the given zero-relative indices in the receiver. |
| * If the item at the given zero-relative index in the receiver |
| * is selected, it is deselected. If the item at the index |
| * was not selected, it remains deselected. Indices that are out |
| * of range and duplicate indices are ignored. |
| * |
| * @param indices the array of indices for the items to deselect |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the set of indices is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void deselect (int [] indices) { |
| checkWidget(); |
| if (indices == null) error (SWT.ERROR_NULL_ARGUMENT); |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| int count = GTK.gtk_tree_model_iter_n_children (modelHandle, 0); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| for (int i=0; i<indices.length; i++) { |
| int index = indices [i]; |
| if (index < 0 || index > count - 1) continue; |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| GTK.gtk_tree_selection_unselect_iter (selection, iter); |
| } |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| OS.g_free (iter); |
| } |
| |
| /** |
| * Deselects all selected items in the receiver. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void deselectAll () { |
| checkWidget(); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| GTK.gtk_tree_selection_unselect_all (selection); |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| } |
| |
| @Override |
| boolean dragDetect (int x, int y, boolean filter, boolean dragOnTimeout, boolean [] consume) { |
| boolean selected = false; |
| if (OS.isX11()) { //Wayland |
| if (filter) { |
| long [] path = new long [1]; |
| if (GTK.gtk_tree_view_get_path_at_pos (handle, x, y, path, null, null, null)) { |
| if (path [0] != 0) { |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| if (GTK.gtk_tree_selection_path_is_selected (selection, path [0])) selected = true; |
| GTK.gtk_tree_path_free (path [0]); |
| } |
| } else { |
| return false; |
| } |
| } |
| boolean dragDetect = super.dragDetect (x, y, filter, false, consume); |
| if (dragDetect && selected && consume != null) consume [0] = true; |
| return dragDetect; |
| } else { |
| double [] startX = new double[1]; |
| double [] startY = new double [1]; |
| long [] path = new long [1]; |
| if (GTK.gtk_gesture_drag_get_start_point(dragGesture, startX, startY)) { |
| if (GTK.gtk_tree_view_get_path_at_pos (handle, (int) startX[0], (int) startY[0], path, null, null, null)) { |
| if (path [0] != 0) { |
| boolean dragDetect = super.dragDetect (x, y, filter, false, consume); |
| if (dragDetect && selected && consume != null) consume [0] = true; |
| return dragDetect; |
| } |
| } else { |
| return false; |
| } |
| } |
| } |
| return false; |
| } |
| |
| |
| @Override |
| long eventWindow () { |
| return paintWindow (); |
| } |
| |
| /** |
| * Returns the zero-relative index of the item which currently |
| * has the focus in the receiver, or -1 if no item has focus. |
| * |
| * @return the index of the selected item |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getFocusIndex () { |
| checkWidget(); |
| long [] path = new long [1]; |
| GTK.gtk_tree_view_get_cursor (handle, path, null); |
| if (path [0] == 0) return -1; |
| long indices = GTK.gtk_tree_path_get_indices (path [0]); |
| int [] index = new int []{-1}; |
| if (indices != 0) C.memmove (index, indices, 4); |
| GTK.gtk_tree_path_free (path [0]); |
| return index [0]; |
| } |
| |
| /** |
| * Returns the item at the given, zero-relative index in the |
| * receiver. Throws an exception if the index is out of range. |
| * |
| * @param index the index of the item to return |
| * @return the item at the given index |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public String getItem (int index) { |
| checkWidget(); |
| if (!(0 <= index && index < GTK.gtk_tree_model_iter_n_children (modelHandle, 0))) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| long [] ptr = new long [1]; |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| GTK.gtk_tree_model_get (modelHandle, iter, 0, ptr, -1); |
| OS.g_free (iter); |
| if (ptr [0] == 0) return null; |
| int length = C.strlen (ptr [0]); |
| byte[] buffer2 = new byte [length]; |
| C.memmove (buffer2, ptr [0], length); |
| OS.g_free (ptr [0]); |
| return new String (Converter.mbcsToWcs (buffer2)); |
| } |
| |
| /** |
| * Returns the number of items contained in the receiver. |
| * |
| * @return the number of items |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getItemCount () { |
| checkWidget(); |
| return GTK.gtk_tree_model_iter_n_children (modelHandle, 0); |
| } |
| |
| /** |
| * Returns the height of the area which would be used to |
| * display <em>one</em> of the items in the list. |
| * |
| * @return the height of one item |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getItemHeight () { |
| checkWidget(); |
| return DPIUtil.autoScaleDown(getItemHeightInPixels()); |
| } |
| |
| int getItemHeightInPixels() { |
| checkWidget(); |
| |
| final int BASE_ITEM_PADDING = 1; |
| |
| int[] h = new int [1]; |
| long layout = GTK.gtk_widget_create_pango_layout(handle, Converter.wcsToMbcs(" ", true)); |
| OS.pango_layout_get_pixel_size(layout, null, h); |
| |
| // By default, the item has a base vertical padding around the text |
| int height = h[0] + BASE_ITEM_PADDING * 2; |
| |
| OS.g_object_unref(layout); |
| |
| long column = GTK.gtk_tree_view_get_column(handle, 0); |
| long textRenderer = getTextRenderer(column); |
| int [] ypad = new int[1]; |
| if (textRenderer != 0) { |
| GTK.gtk_cell_renderer_get_padding(textRenderer, null, ypad); |
| } |
| |
| // Add additional top & bottom padding set by the cell renderer |
| height += ypad [0] * 2; |
| |
| return height; |
| } |
| |
| /** |
| * Returns a (possibly empty) array of <code>String</code>s which |
| * are the items in the receiver. |
| * <p> |
| * Note: This is not the actual structure used by the receiver |
| * to maintain its list of items, so modifying the array will |
| * not affect the receiver. |
| * </p> |
| * |
| * @return the items in the receiver's list |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public String [] getItems () { |
| checkWidget(); |
| int count = GTK.gtk_tree_model_iter_n_children (modelHandle, 0); |
| long [] ptr = new long [1]; |
| String [] result = new String [count]; |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| for (int index=0; index<count; index++) { |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| GTK.gtk_tree_model_get (modelHandle, iter, 0, ptr, -1); |
| if (ptr [0] != 0) { |
| int length = C.strlen (ptr [0]); |
| byte[] buffer = new byte [length]; |
| C.memmove (buffer, ptr [0], length); |
| OS.g_free (ptr [0]); |
| result [index] = new String (Converter.mbcsToWcs (buffer)); |
| } |
| } |
| OS.g_free (iter); |
| return result; |
| } |
| |
| /** |
| * Returns an array of <code>String</code>s that are currently |
| * selected in the receiver. The order of the items is unspecified. |
| * An empty array indicates that no items are selected. |
| * <p> |
| * Note: This is not the actual structure used by the receiver |
| * to maintain its selection, so modifying the array will |
| * not affect the receiver. |
| * </p> |
| * @return an array representing the selection |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public String [] getSelection () { |
| checkWidget(); |
| int [] indices = getSelectionIndices (); |
| String [] result = new String [indices.length]; |
| for (int i=0; i<indices.length; i++) { |
| result [i] = getItem (indices [i]); |
| } |
| return result; |
| } |
| |
| /** |
| * Returns the number of selected items contained in the receiver. |
| * |
| * @return the number of selected items |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getSelectionCount () { |
| checkWidget(); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| return GTK.gtk_tree_selection_count_selected_rows (selection); |
| } |
| |
| /** |
| * Returns the zero-relative index of the item which is currently |
| * selected in the receiver, or -1 if no item is selected. |
| * |
| * @return the index of the selected item or -1 |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getSelectionIndex () { |
| checkWidget(); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| long list = GTK.gtk_tree_selection_get_selected_rows (selection, null); |
| long originalList = list; |
| if (list != 0) { |
| int [] index = new int [1]; |
| boolean foundIndex = false; |
| while (list != 0) { |
| long data = OS.g_list_data (list); |
| if (foundIndex == false) { |
| long indices = GTK.gtk_tree_path_get_indices (data); |
| if (indices !=0) { |
| C.memmove (index, indices, 4); |
| foundIndex = true; |
| } |
| } |
| list = OS.g_list_next (list); |
| GTK.gtk_tree_path_free (data); |
| } |
| OS.g_list_free (originalList); |
| return index [0]; |
| } |
| return -1; |
| } |
| |
| /** |
| * Returns the zero-relative indices of the items which are currently |
| * selected in the receiver. The order of the indices is unspecified. |
| * The array is empty if no items are selected. |
| * <p> |
| * Note: This is not the actual structure used by the receiver |
| * to maintain its selection, so modifying the array will |
| * not affect the receiver. |
| * </p> |
| * @return the array of indices of the selected items |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int [] getSelectionIndices () { |
| checkWidget(); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| long list = GTK.gtk_tree_selection_get_selected_rows (selection, null); |
| long originalList = list; |
| if (list != 0) { |
| int count = OS.g_list_length (list); |
| int [] treeSelection = new int [count]; |
| int length = 0; |
| for (int i=0; i<count; i++) { |
| long data = OS.g_list_data (list); |
| long indices = GTK.gtk_tree_path_get_indices (data); |
| if (indices != 0) { |
| int [] index = new int [1]; |
| C.memmove (index, indices, 4); |
| treeSelection [length] = index [0]; |
| length++; |
| } |
| GTK.gtk_tree_path_free (data); |
| list = OS.g_list_next (list); |
| } |
| OS.g_list_free (originalList); |
| int [] result = new int [length]; |
| System.arraycopy (treeSelection, 0, result, 0, length); |
| return result; |
| } |
| return new int [0]; |
| } |
| |
| long getTextRenderer (long column) { |
| long list = GTK.gtk_cell_layout_get_cells(column); |
| if (list == 0) return 0; |
| long originalList = list; |
| long textRenderer = 0; |
| while (list != 0) { |
| long renderer = OS.g_list_data (list); |
| if (GTK.GTK_IS_CELL_RENDERER_TEXT (renderer)) { |
| textRenderer = renderer; |
| break; |
| } |
| list = OS.g_list_next (list); |
| } |
| OS.g_list_free (originalList); |
| return textRenderer; |
| } |
| |
| /** |
| * Returns the zero-relative index of the item which is currently |
| * at the top of the receiver. This index can change when items are |
| * scrolled or new items are added or removed. |
| * |
| * @return the index of the top item |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getTopIndex () { |
| checkWidget(); |
| /* |
| * Feature in GTK: fetch the topIndex using the topIndex global variable |
| * if setTopIndex() has been called and the widget has not been scrolled |
| * using the UI. Otherwise, fetch topIndex using GtkTreeView API. |
| */ |
| long vAdjustment = GTK.gtk_scrollable_get_vadjustment (handle); |
| currentAdjustment = GTK.gtk_adjustment_get_value (vAdjustment); |
| if (cachedAdjustment == currentAdjustment) { |
| if (Device.DEBUG) { |
| System.out.println("Using the cached GtkAdjustment, topIndex is " + topIndex); |
| } |
| return topIndex; |
| } else { |
| long [] path = new long [1]; |
| GTK.gtk_widget_realize (handle); |
| if (!GTK.gtk_tree_view_get_path_at_pos (handle, 1, 1, path, null, null, null)) return 0; |
| if (path [0] == 0) return 0; |
| long indices = GTK.gtk_tree_path_get_indices (path[0]); |
| int[] index = new int [1]; |
| if (indices != 0) C.memmove (index, indices, 4); |
| GTK.gtk_tree_path_free (path [0]); |
| if (Device.DEBUG) { |
| System.out.println("Fetching the top index from GTK, topIndex is " + index[0]); |
| } |
| return index [0]; |
| } |
| } |
| |
| @Override |
| long gtk_changed (long widget) { |
| sendSelectionEvent (SWT.Selection); |
| return 0; |
| } |
| |
| @Override |
| long gtk_button_press_event (long widget, long event) { |
| long result = super.gtk_button_press_event (widget, event); |
| if (result != 0) return result; |
| /* |
| * Feature in GTK. In multi-select tree view there is a problem with using DnD operations while also selecting multiple items. |
| * When doing a DnD, GTK de-selects all other items except for the widget being dragged from. By disabling the selection function |
| * in GTK in the case that additional items aren't being added (CTRL_MASK or SHIFT_MASK) and the item being dragged is already |
| * selected, we can give the DnD handling to MOTION-NOTIFY. See Bug 503431 |
| */ |
| int eventType = GDK.gdk_event_get_event_type(event); |
| |
| double [] eventX = new double [1]; |
| double [] eventY = new double [1]; |
| int [] eventState = new int [1]; |
| int [] eventButton = new int [1]; |
| if (GTK.GTK4) { |
| eventButton[0] = GDK.gdk_button_event_get_button(event); |
| eventState[0] = GDK.gdk_event_get_modifier_state(event); |
| GDK.gdk_event_get_position(event, eventX, eventY); |
| } else { |
| GDK.gdk_event_get_button(event, eventButton); |
| GDK.gdk_event_get_state(event, eventState); |
| GDK.gdk_event_get_coords(event, eventX, eventY); |
| } |
| |
| if ((state & DRAG_DETECT) != 0 && hooks (SWT.DragDetect) && |
| !OS.isX11() && eventType == GDK.GDK_BUTTON_PRESS) { // Wayland |
| // check to see if there is another event coming in that is not a double/triple click, this is to prevent Bug 514531 |
| long nextEvent = GDK.gdk_event_peek(); |
| if (nextEvent == 0) { |
| long [] path = new long [1]; |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| if (GTK.gtk_tree_view_get_path_at_pos (handle, (int)eventX[0], (int)eventY[0], path, null, null, null) && |
| path[0] != 0) { |
| // selection count is used in the case of clicking an already selected item while holding Control |
| selectionCountOnPress = getSelectionCount(); |
| if (GTK.gtk_tree_selection_path_is_selected (selection, path[0])) { |
| if (((eventState[0] & (GDK.GDK_CONTROL_MASK|GDK.GDK_SHIFT_MASK)) == 0) || |
| ((eventState[0] & GDK.GDK_CONTROL_MASK) != 0)) { |
| /** |
| * Disable selection on a mouse click if there are multiple items already selected. Also, |
| * if control is currently being held down, we will designate the selection logic over to release |
| * instead by first disabling the selection. |
| * E.g to reproduce: Open DNDExample, select "Tree", select multiple items, try dragging. |
| * without line below, only one item is selected for drag. |
| */ |
| long gtk_false_funcPtr = GTK.GET_FUNCTION_POINTER_gtk_false(); |
| GTK.gtk_tree_selection_set_select_function(selection, gtk_false_funcPtr, 0, 0); |
| } |
| } |
| } |
| } else { |
| gdk_event_free (nextEvent); |
| } |
| } |
| /* |
| * Feature in GTK. In a multi-select list view, when multiple items are already |
| * selected, the selection state of the item is toggled and the previous selection |
| * is cleared. This is not the desired behaviour when bringing up a popup menu. |
| * Also, when an item is reselected with the right button, the tree view issues |
| * an unwanted selection event. The workaround is to detect that case and not |
| * run the default handler when the item is already part of the current selection. |
| */ |
| |
| int button = eventButton[0]; |
| if (button == 3 && eventType == GDK.GDK_BUTTON_PRESS) { |
| long [] path = new long [1]; |
| if (GTK.gtk_tree_view_get_path_at_pos (handle, (int)eventX[0], (int)eventY[0], path, null, null, null)) { |
| if (path [0] != 0) { |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| if (GTK.gtk_tree_selection_path_is_selected (selection, path [0])) result = 1; |
| GTK.gtk_tree_path_free (path [0]); |
| } |
| } |
| } |
| |
| /* |
| * Feature in GTK. When the user clicks in a single selection GtkTreeView |
| * and there are no selected items, the first item is selected automatically |
| * before the click is processed, causing two selection events. The is fix |
| * is the set the cursor item to be same as the clicked item to stop the |
| * widget from automatically selecting the first item. |
| */ |
| if ((style & SWT.SINGLE) != 0 && getSelectionCount () == 0) { |
| long [] path = new long [1]; |
| if (GTK.gtk_tree_view_get_path_at_pos (handle, (int)eventX[0], (int)eventY[0], path, null, null, null)) { |
| if (path [0] != 0) { |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| GTK.gtk_tree_view_set_cursor (handle, path [0], 0, false); |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| GTK.gtk_tree_path_free (path [0]); |
| } |
| } |
| } |
| |
| /* |
| * Bug 312568: If mouse double-click pressed, manually send a DefaultSelection. |
| * Bug 518414: Added rowActivated guard flag to only send a DefaultSelection when the |
| * double-click triggers a 'row-activated' signal. Note that this relies on the fact |
| * that 'row-activated' signal comes before double-click event. This prevents |
| * opening of the current highlighted item when double clicking on any expander arrow. |
| */ |
| if (eventType == GDK.GDK_2BUTTON_PRESS && rowActivated) { |
| sendTreeDefaultSelection (); |
| rowActivated = false; |
| } |
| |
| return result; |
| } |
| |
| @Override |
| void gtk_gesture_press_event (long gesture, int n_press, double x, double y, long event) { |
| if (n_press == 1) return; |
| super.gtk_gesture_press_event(gesture, n_press, x, y, event); |
| |
| if (n_press == 2 && rowActivated) { |
| sendTreeDefaultSelection (); |
| rowActivated = false; |
| } |
| } |
| |
| @Override |
| long gtk_row_activated (long tree, long path, long column) { |
| rowActivated = true; |
| return 0; |
| } |
| |
| |
| @Override |
| long gtk_key_press_event (long widget, long event) { |
| int [] key = new int [1]; |
| if (GTK.GTK4) { |
| key[0] = GDK.gdk_key_event_get_keyval(event); |
| } else { |
| GDK.gdk_event_get_keyval(event, key); |
| } |
| |
| keyPressDefaultSelectionHandler (event, key[0]); |
| return super.gtk_key_press_event (widget, event); |
| } |
| |
| @Override |
| long gtk_button_release_event (long widget, long event) { |
| int [] eventState = new int [1]; |
| double [] eventX = new double [1]; |
| double [] eventY = new double [1]; |
| if (GTK.GTK4) { |
| eventState[0] = GDK.gdk_event_get_modifier_state(event); |
| GDK.gdk_event_get_position(event, eventX, eventY); |
| } else { |
| GDK.gdk_event_get_state(event, eventState); |
| GDK.gdk_event_get_coords(event, eventX, eventY); |
| } |
| |
| long eventGdkResource = gdk_event_get_surface_or_window(event); |
| if (GTK.GTK4) { |
| if (eventGdkResource != gtk_widget_get_surface (handle)) return 0; |
| } else { |
| if (eventGdkResource != GTK.gtk_tree_view_get_bin_window (handle)) return 0; |
| } |
| /* |
| * Feature in GTK. In multi-select tree view there is a problem with using DnD operations while also selecting multiple items. |
| * When doing a DnD, GTK de-selects all other items except for the widget being dragged from. By disabling the selection function |
| * in GTK in the case that additional items aren't being added (CTRL_MASK or SHIFT_MASK) and the item being dragged is already |
| * selected, we can give the DnD handling to MOTION-NOTIFY. On release, we can then re-enable the selection method |
| * and also select the item in the tree by moving the selection logic to release instead. See Bug 503431. |
| */ |
| if ((state & DRAG_DETECT) != 0 && hooks (SWT.DragDetect) && !OS.isX11()) { // Wayland |
| long [] path = new long [1]; |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| // free up the selection function on release. |
| GTK.gtk_tree_selection_set_select_function(selection,0,0,0); |
| if (GTK.gtk_tree_view_get_path_at_pos (handle, (int)eventX[0], (int)eventY[0], path, null, null, null) && |
| path[0] != 0 && GTK.gtk_tree_selection_path_is_selected (selection, path[0])) { |
| selectionCountOnRelease = getSelectionCount(); |
| if ((eventState[0] & (GDK.GDK_CONTROL_MASK|GDK.GDK_SHIFT_MASK)) == 0) { |
| GTK.gtk_tree_view_set_cursor(handle, path[0], 0, false); |
| } |
| // Check to see if there has been a new tree item selected when holding Control in Path. |
| // If not, deselect the item. |
| if ((eventState[0] & GDK.GDK_CONTROL_MASK) != 0 && selectionCountOnRelease == selectionCountOnPress) { |
| GTK.gtk_tree_selection_unselect_path (selection,path[0]); |
| } |
| } |
| } |
| return super.gtk_button_release_event (widget, event); |
| } |
| |
| /** |
| * Used to emulate DefaultSelection event. See Bug 312568. |
| * @param event the gtk key press event that was fired. |
| */ |
| void keyPressDefaultSelectionHandler (long event, int key) { |
| int keymask = gdk_event_get_state (event); |
| switch (key) { |
| case GDK.GDK_Return: |
| // Send DefaultSelectionEvent when: |
| // when : Enter, Shift+Enter, Ctrl+Enter are pressed. |
| // Not when: Alt+Enter, (Meta|Super|Hyper)+Enter, reason is stateMask is not provided on Gtk. |
| // Note: alt+Enter creates a selection on GTK, but we filter it out to be a bit more consitent Win32 (521387) |
| if ((keymask & (GDK.GDK_SUPER_MASK | GDK.GDK_META_MASK | GDK.GDK_HYPER_MASK | GDK.GDK_MOD1_MASK)) == 0) { |
| sendTreeDefaultSelection (); |
| } |
| break; |
| } |
| } |
| |
| /** |
| * Used to emulate DefaultSelection event. See Bug 312568. |
| * Feature in GTK. 'row-activation' event comes before DoubleClick event. |
| * This is causing the editor not to get focus after double-click. |
| * The solution is to manually send the DefaultSelection event after a double-click, |
| * and to emulate it for Space/Return. |
| */ |
| void sendTreeDefaultSelection() { |
| |
| //Note, similar DefaultSelectionHandling in SWT List/Table/Tree |
| Event event = new Event (); |
| event.index = this.getFocusIndex (); |
| |
| if (event.index >= 0) event.text = this.getItem (event.index); |
| sendSelectionEvent (SWT.DefaultSelection, event, false); |
| } |
| |
| @Override |
| void hookEvents () { |
| super.hookEvents(); |
| long selection = GTK.gtk_tree_view_get_selection(handle); |
| OS.g_signal_connect_closure (selection, OS.changed, display.getClosure (CHANGED), false); |
| OS.g_signal_connect_closure (handle, OS.row_activated, display.getClosure (ROW_ACTIVATED), false); |
| } |
| |
| /** |
| * Gets the index of an item. |
| * <p> |
| * The list is searched starting at 0 until an |
| * item is found that is equal to the search item. |
| * If no item is found, -1 is returned. Indexing |
| * is zero based. |
| * |
| * @param string the search item |
| * @return the index of the item |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int indexOf (String string) { |
| checkWidget(); |
| return indexOf (string, 0); |
| } |
| |
| /** |
| * Searches the receiver's list starting at the given, |
| * zero-relative index until an item is found that is equal |
| * to the argument, and returns the index of that item. If |
| * no item is found or the starting index is out of range, |
| * returns -1. |
| * |
| * @param string the search item |
| * @param start the zero-relative index at which to start the search |
| * @return the index of the item |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int indexOf (String string, int start) { |
| checkWidget(); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| String [] items = getItems (); |
| for (int i=start; i<items.length; i++) { |
| if (items [i].equals (string)) return i; |
| } |
| return -1; |
| } |
| |
| /** |
| * Returns <code>true</code> if the item is selected, |
| * and <code>false</code> otherwise. Indices out of |
| * range are ignored. |
| * |
| * @param index the index of the item |
| * @return the selection state of the item at the index |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public boolean isSelected (int index) { |
| checkWidget(); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| byte [] buffer = Converter.wcsToMbcs (Integer.toString (index), true); |
| long path = GTK.gtk_tree_path_new_from_string (buffer); |
| boolean answer = GTK.gtk_tree_selection_path_is_selected (selection, path); |
| GTK.gtk_tree_path_free (path); |
| return answer; |
| } |
| |
| @Override |
| long paintWindow () { |
| GTK.gtk_widget_realize (handle); |
| // TODO: this function has been removed on GTK4 |
| return GTK.gtk_tree_view_get_bin_window (handle); |
| } |
| |
| @Override |
| void register () { |
| super.register (); |
| display.addWidget (GTK.gtk_tree_view_get_selection (handle), this); |
| } |
| |
| @Override |
| void releaseWidget () { |
| super.releaseWidget (); |
| if (modelHandle != 0) OS.g_object_unref (modelHandle); |
| modelHandle = 0; |
| } |
| |
| /** |
| * Removes the item from the receiver at the given |
| * zero-relative index. |
| * |
| * @param index the index for the item |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void remove (int index) { |
| checkWidget(); |
| if (!(0 <= index && index < GTK.gtk_tree_model_iter_n_children (modelHandle, 0))) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| GTK.gtk_list_store_remove (modelHandle, iter); |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| OS.g_free (iter); |
| } |
| |
| /** |
| * Removes the items from the receiver which are |
| * between the given zero-relative start and end |
| * indices (inclusive). |
| * |
| * @param start the start of the range |
| * @param end the end of the range |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE - if either the start or end are not between 0 and the number of elements in the list minus 1 (inclusive)</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void remove (int start, int end) { |
| checkWidget(); |
| if (start > end) return; |
| int count = GTK.gtk_tree_model_iter_n_children (modelHandle, 0); |
| if (!(0 <= start && start <= end && end < count)) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| for (int index=end; index>=start; index--) { |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| GTK.gtk_list_store_remove (modelHandle, iter); |
| } |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| OS.g_free (iter); |
| } |
| |
| /** |
| * Searches the receiver's list starting at the first item |
| * until an item is found that is equal to the argument, |
| * and removes that item from the list. |
| * |
| * @param string the item to remove |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the string is not found in the list</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void remove (String string) { |
| checkWidget(); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| int index = indexOf (string, 0); |
| if (index == -1) error (SWT.ERROR_INVALID_ARGUMENT); |
| remove (index); |
| } |
| |
| /** |
| * Removes the items from the receiver at the given |
| * zero-relative indices. |
| * |
| * @param indices the array of indices of the items |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li> |
| * <li>ERROR_NULL_ARGUMENT - if the indices array is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void remove (int [] indices) { |
| checkWidget(); |
| if (indices == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (indices.length == 0) return; |
| int [] newIndices = new int [indices.length]; |
| System.arraycopy (indices, 0, newIndices, 0, indices.length); |
| sort (newIndices); |
| int start = newIndices [newIndices.length - 1], end = newIndices [0]; |
| int count = getItemCount(); |
| if (!(0 <= start && start <= end && end < count)) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| int last = -1; |
| for (int i=0; i<newIndices.length; i++) { |
| int index = newIndices [i]; |
| if (index != last) { |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| GTK.gtk_list_store_remove (modelHandle, iter); |
| last = index; |
| } |
| } |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| OS.g_free (iter); |
| } |
| |
| /** |
| * Removes all of the items from the receiver. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void removeAll () { |
| checkWidget(); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| GTK.gtk_list_store_clear (modelHandle); |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the user changes the receiver's selection. |
| * |
| * @param listener the listener which should no longer be notified |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the listener is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see SelectionListener |
| * @see #addSelectionListener |
| */ |
| public void removeSelectionListener(SelectionListener listener) { |
| checkWidget(); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (eventTable == null) return; |
| eventTable.unhook (SWT.Selection, listener); |
| eventTable.unhook (SWT.DefaultSelection,listener); |
| } |
| |
| /** |
| * Selects the item at the given zero-relative index in the receiver's |
| * list. If the item at the index was already selected, it remains |
| * selected. Indices that are out of range are ignored. |
| * |
| * @param index the index of the item to select |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void select (int index) { |
| checkWidget(); |
| if (!(0 <= index && index < GTK.gtk_tree_model_iter_n_children (modelHandle, 0))) return; |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| GTK.gtk_tree_selection_select_iter (selection, iter); |
| if ((style & SWT.SINGLE) != 0) { |
| long path = GTK.gtk_tree_model_get_path (modelHandle, iter); |
| GTK.gtk_tree_view_set_cursor (handle, path, 0, false); |
| GTK.gtk_tree_path_free (path); |
| } |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| OS.g_free (iter); |
| } |
| |
| /** |
| * Selects the items in the range specified by the given zero-relative |
| * indices in the receiver. The range of indices is inclusive. |
| * The current selection is not cleared before the new items are selected. |
| * <p> |
| * If an item in the given range is not selected, it is selected. |
| * If an item in the given range was already selected, it remains selected. |
| * Indices that are out of range are ignored and no items will be selected |
| * if start is greater than end. |
| * If the receiver is single-select and there is more than one item in the |
| * given range, then all indices are ignored. |
| * |
| * @param start the start of the range |
| * @param end the end of the range |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see List#setSelection(int,int) |
| */ |
| public void select (int start, int end) { |
| checkWidget (); |
| if (end < 0 || start > end || ((style & SWT.SINGLE) != 0 && start != end)) return; |
| int count = GTK.gtk_tree_model_iter_n_children (modelHandle, 0); |
| if (count == 0 || start >= count) return; |
| start = Math.max (0, start); |
| end = Math.min (end, count - 1); |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| for (int index=start; index<=end; index++) { |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| GTK.gtk_tree_selection_select_iter (selection, iter); |
| if ((style & SWT.SINGLE) != 0) { |
| long path = GTK.gtk_tree_model_get_path (modelHandle, iter); |
| GTK.gtk_tree_view_set_cursor (handle, path, 0, false); |
| GTK.gtk_tree_path_free (path); |
| } |
| } |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| OS.g_free (iter); |
| } |
| |
| /** |
| * Selects the items at the given zero-relative indices in the receiver. |
| * The current selection is not cleared before the new items are selected. |
| * <p> |
| * If the item at a given index is not selected, it is selected. |
| * If the item at a given index was already selected, it remains selected. |
| * Indices that are out of range and duplicate indices are ignored. |
| * If the receiver is single-select and multiple indices are specified, |
| * then all indices are ignored. |
| * |
| * @param indices the array of indices for the items to select |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the array of indices is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see List#setSelection(int[]) |
| */ |
| public void select (int [] indices) { |
| checkWidget (); |
| if (indices == null) error (SWT.ERROR_NULL_ARGUMENT); |
| int length = indices.length; |
| if (length == 0 || ((style & SWT.SINGLE) != 0 && length > 1)) return; |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| int count = GTK.gtk_tree_model_iter_n_children (modelHandle, 0); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| for (int i=0; i<length; i++) { |
| int index = indices [i]; |
| if (!(0 <= index && index < count)) continue; |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| GTK.gtk_tree_selection_select_iter (selection, iter); |
| if ((style & SWT.SINGLE) != 0) { |
| long path = GTK.gtk_tree_model_get_path (modelHandle, iter); |
| GTK.gtk_tree_view_set_cursor (handle, path, 0, false); |
| GTK.gtk_tree_path_free (path); |
| } |
| } |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| OS.g_free (iter); |
| } |
| |
| /** |
| * Selects all of the items in the receiver. |
| * <p> |
| * If the receiver is single-select, do nothing. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void selectAll () { |
| checkWidget(); |
| if ((style & SWT.SINGLE) != 0) return; |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| GTK.gtk_tree_selection_select_all (selection); |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| } |
| |
| void selectFocusIndex (int index) { |
| /* |
| * Note that this method both selects and sets the focus to the |
| * specified index, so any previous selection in the list will be lost. |
| * gtk does not provide a way to just set focus to a specified list item. |
| */ |
| int count = GTK.gtk_tree_model_iter_n_children (modelHandle, 0); |
| if (!(0 <= index && index < count)) return; |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| long path = GTK.gtk_tree_model_get_path (modelHandle, iter); |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| GTK.gtk_tree_view_set_cursor (handle, path, 0, false); |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| GTK.gtk_tree_path_free (path); |
| OS.g_free (iter); |
| } |
| |
| @Override |
| int setBounds (int x, int y, int width, int height, boolean move, boolean resize) { |
| int result = super.setBounds (x, y, width, height, move, resize); |
| /* |
| * Bug on GTK. The tree view sometimes does not get a paint |
| * event or resizes to a one pixel square when resized in a new |
| * shell that is not visible after any event loop has been run. The |
| * problem is intermittent. It doesn't seem to happen the first time |
| * a new shell is created. The fix is to ensure the tree view is realized |
| * after it has been resized. |
| */ |
| GTK.gtk_widget_realize (handle); |
| return result; |
| } |
| |
| /** |
| * Sets the text of the item in the receiver's list at the given |
| * zero-relative index to the string argument. |
| * |
| * @param index the index for the item |
| * @param string the new text for the item |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li> |
| * <li>ERROR_NULL_ARGUMENT - if the string is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setItem (int index, String string) { |
| checkWidget(); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (!(0 <= index && index < GTK.gtk_tree_model_iter_n_children (modelHandle, 0))) { |
| error (SWT.ERROR_INVALID_RANGE); |
| } |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| byte [] buffer = Converter.wcsToMbcs (string, true); |
| GTK.gtk_list_store_set (modelHandle, iter, TEXT_COLUMN, buffer, -1); |
| OS.g_free (iter); |
| } |
| |
| /** |
| * Sets the receiver's items to be the given array of items. |
| * |
| * @param items the array of items |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the items array is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if an item in the items array is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setItems (String... items) { |
| checkWidget(); |
| if (items == null) error (SWT.ERROR_NULL_ARGUMENT); |
| for (int i=0; i<items.length; i++) { |
| if (items [i] == null) error (SWT.ERROR_INVALID_ARGUMENT); |
| } |
| long selection = GTK.gtk_tree_view_get_selection (handle); |
| OS.g_signal_handlers_block_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| GTK.gtk_list_store_clear (modelHandle); |
| OS.g_signal_handlers_unblock_matched (selection, OS.G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, CHANGED); |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| if (iter == 0) error (SWT.ERROR_ITEM_NOT_ADDED); |
| for (int i=0; i<items.length; i++) { |
| String string = items [i]; |
| byte [] buffer = Converter.wcsToMbcs (string, true); |
| GTK.gtk_list_store_append (modelHandle, iter); |
| GTK.gtk_list_store_set (modelHandle, iter, TEXT_COLUMN, buffer, -1); |
| } |
| OS.g_free (iter); |
| } |
| |
| @Override |
| void setForegroundGdkRGBA (GdkRGBA rgba) { |
| GdkRGBA toSet = rgba == null ? display.COLOR_LIST_FOREGROUND_RGBA : rgba; |
| setForegroundGdkRGBA (handle, toSet); |
| } |
| |
| /** |
| * Selects the item at the given zero-relative index in the receiver. |
| * If the item at the index was already selected, it remains selected. |
| * The current selection is first cleared, then the new item is selected, |
| * and if necessary the receiver is scrolled to make the new selection visible. |
| * Indices that are out of range are ignored. |
| * |
| * @param index the index of the item to select |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * @see List#deselectAll() |
| * @see List#select(int) |
| */ |
| public void setSelection (int index) { |
| checkWidget (); |
| deselectAll (); |
| selectFocusIndex (index); |
| showSelection (); |
| } |
| |
| /** |
| * Selects the items in the range specified by the given zero-relative |
| * indices in the receiver. The range of indices is inclusive. |
| * The current selection is cleared before the new items are selected, |
| * and if necessary the receiver is scrolled to make the new selection visible. |
| * <p> |
| * Indices that are out of range are ignored and no items will be selected |
| * if start is greater than end. |
| * If the receiver is single-select and there is more than one item in the |
| * given range, then all indices are ignored. |
| * |
| * @param start the start index of the items to select |
| * @param end the end index of the items to select |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see List#deselectAll() |
| * @see List#select(int,int) |
| */ |
| public void setSelection (int start, int end) { |
| checkWidget (); |
| deselectAll (); |
| if (end < 0 || start > end || ((style & SWT.SINGLE) != 0 && start != end)) return; |
| int count = GTK.gtk_tree_model_iter_n_children (modelHandle, 0); |
| if (count == 0 || start >= count) return; |
| start = Math.max (0, start); |
| end = Math.min (end, count - 1); |
| selectFocusIndex (start); |
| if ((style & SWT.MULTI) != 0) { |
| select (start, end); |
| } |
| showSelection (); |
| } |
| |
| /** |
| * Selects the items at the given zero-relative indices in the receiver. |
| * The current selection is cleared before the new items are selected, |
| * and if necessary the receiver is scrolled to make the new selection visible. |
| * <p> |
| * Indices that are out of range and duplicate indices are ignored. |
| * If the receiver is single-select and multiple indices are specified, |
| * then all indices are ignored. |
| * |
| * @param indices the indices of the items to select |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the array of indices is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see List#deselectAll() |
| * @see List#select(int[]) |
| */ |
| public void setSelection(int[] indices) { |
| checkWidget (); |
| if (indices == null) error (SWT.ERROR_NULL_ARGUMENT); |
| deselectAll (); |
| int length = indices.length; |
| if (length == 0 || ((style & SWT.SINGLE) != 0 && length > 1)) return; |
| selectFocusIndex (indices [0]); |
| if ((style & SWT.MULTI) != 0) { |
| select (indices); |
| } |
| showSelection (); |
| } |
| |
| /** |
| * Sets the receiver's selection to be the given array of items. |
| * The current selection is cleared before the new items are selected, |
| * and if necessary the receiver is scrolled to make the new selection visible. |
| * <p> |
| * Items that are not in the receiver are ignored. |
| * If the receiver is single-select and multiple items are specified, |
| * then all items are ignored. |
| * |
| * @param items the array of items |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the array of items is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see List#deselectAll() |
| * @see List#select(int[]) |
| * @see List#setSelection(int[]) |
| */ |
| public void setSelection (String [] items) { |
| checkWidget (); |
| if (items == null) error (SWT.ERROR_NULL_ARGUMENT); |
| deselectAll (); |
| int length = items.length; |
| if (length == 0 || ((style & SWT.SINGLE) != 0 && length > 1)) return; |
| boolean first = true; |
| for (int i = 0; i < length; i++) { |
| int index = 0; |
| String string = items [i]; |
| if (string != null) { |
| while ((index = indexOf (string, index)) != -1) { |
| if ((style & SWT.MULTI) != 0) { |
| if (first) { |
| first = false; |
| selectFocusIndex (index); |
| } else { |
| select (index); |
| } |
| } else { |
| selectFocusIndex (index); |
| break; |
| } |
| index++; |
| } |
| } |
| } |
| showSelection (); |
| } |
| |
| /** |
| * Sets the zero-relative index of the item which is currently |
| * at the top of the receiver. This index can change when items |
| * are scrolled or new items are added and removed. |
| * |
| * @param index the index of the top item |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setTopIndex (int index) { |
| checkWidget(); |
| /* |
| * Feature in GTK: cache the GtkAdjustment value for future use in |
| * getTopIndex(). Set topIndex to index. |
| * |
| * Use gtk_tree_view_get_view_get_vadjustment for GTK2, GtkScrollable |
| * doesn't exist on GTK2. |
| */ |
| long vAdjustment = GTK.gtk_scrollable_get_vadjustment (handle); |
| cachedAdjustment = GTK.gtk_adjustment_get_value (vAdjustment); |
| topIndex = index; |
| /* |
| * Scroll to the cell, now that the topIndex variable has been set. |
| */ |
| if (!(0 <= index && index < GTK.gtk_tree_model_iter_n_children (modelHandle, 0))) return; |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| long path = GTK.gtk_tree_model_get_path (modelHandle, iter); |
| GTK.gtk_tree_view_scroll_to_cell (handle, path, 0, true, 0, 0); |
| GTK.gtk_tree_path_free (path); |
| OS.g_free (iter); |
| } |
| |
| /** |
| * Shows the selection. If the selection is already showing in the receiver, |
| * this method simply returns. Otherwise, the items are scrolled until |
| * the selection is visible. |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void showSelection () { |
| checkWidget(); |
| int index = getSelectionIndex (); |
| if (index == -1) return; |
| long iter = OS.g_malloc (GTK.GtkTreeIter_sizeof ()); |
| GTK.gtk_tree_model_iter_nth_child (modelHandle, iter, 0, index); |
| long path = GTK.gtk_tree_model_get_path (modelHandle, iter); |
| |
| GTK.gtk_widget_realize (handle); |
| GTK.gtk_tree_view_scroll_to_cell (handle, path, 0, false, 0, 0); |
| |
| /* |
| * Reverting the code for bug 459072. With gtk_tree_view_scroll_to_cell, there are some pending gtk events. |
| * the scroll does not happen immediately. We still need to perform gtk_tree_view_scroll_to_point to complete |
| * all the pending events and update top index. |
| */ |
| GdkRectangle visibleRect = new GdkRectangle (); |
| GTK.gtk_tree_view_get_visible_rect (handle, visibleRect); |
| GdkRectangle cellRect = new GdkRectangle (); |
| GTK.gtk_tree_view_get_cell_area (handle, path, 0, cellRect); |
| int[] tx = new int[1], ty = new int[1]; |
| GTK.gtk_tree_view_convert_bin_window_to_tree_coords(handle, cellRect.x, cellRect.y, tx, ty); |
| if (ty[0] < visibleRect.y ) { |
| GTK.gtk_tree_view_scroll_to_point (handle, -1, ty[0]); |
| } else { |
| int height = Math.min (visibleRect.height, cellRect.height); |
| if (ty[0] + height > visibleRect.y + visibleRect.height) { |
| ty[0] += cellRect.height - visibleRect.height; |
| GTK.gtk_tree_view_scroll_to_point (handle, -1, ty[0]); |
| } |
| } |
| GTK.gtk_tree_path_free (path); |
| OS.g_free (iter); |
| } |
| |
| } |