| /******************************************************************************* |
| * Copyright (c) 2000, 2008 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.internal.gtk.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.graphics.*; |
| |
| /** |
| * Instances of this class support the layout of selectable |
| * expand bar items. |
| * <p> |
| * The item children that may be added to instances of this class |
| * must be of type <code>ExpandItem</code>. |
| * </p><p> |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>V_SCROLL</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Expand, Collapse</dd> |
| * </dl> |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see ExpandItem |
| * @see ExpandEvent |
| * @see ExpandListener |
| * @see ExpandAdapter |
| * @see <a href="http://www.eclipse.org/swt/snippets/#expandbar">ExpandBar 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> |
| * |
| * @since 3.2 |
| */ |
| public class ExpandBar extends Composite { |
| ExpandItem [] items; |
| ExpandItem lastFocus; |
| int itemCount; |
| int spacing; |
| int yCurrentScroll; |
| |
| /** |
| * 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 Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public ExpandBar (Composite parent, int style) { |
| super (parent, style); |
| } |
| |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when an item in the receiver is expanded or collapsed |
| * by sending it one of the messages defined in the <code>ExpandListener</code> |
| * interface. |
| * |
| * @param listener the listener which should 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 ExpandListener |
| * @see #removeExpandListener |
| */ |
| public void addExpandListener (ExpandListener listener) { |
| checkWidget (); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| TypedListener typedListener = new TypedListener (listener); |
| addListener (SWT.Expand, typedListener); |
| addListener (SWT.Collapse, typedListener); |
| } |
| |
| protected void checkSubclass () { |
| if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS); |
| } |
| |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| if (OS.GTK_VERSION >= OS.VERSION (2, 4, 0)) { |
| if (wHint != SWT.DEFAULT && wHint < 0) wHint = 0; |
| if (hHint != SWT.DEFAULT && hHint < 0) hHint = 0; |
| Point size = computeNativeSize (handle, wHint, hHint, changed); |
| int border = OS.gtk_container_get_border_width (handle); |
| size.x += 2 * border; |
| size.y += 2 * border; |
| return size; |
| } else { |
| int height = 0, width = 0; |
| if (wHint == SWT.DEFAULT || hHint == SWT.DEFAULT) { |
| if (itemCount > 0) { |
| height += spacing; |
| GC gc = new GC (this); |
| for (int i = 0; i < itemCount; i++) { |
| ExpandItem item = items [i]; |
| height += item.getHeaderHeight (); |
| if (item.expanded) height += item.height; |
| height += spacing; |
| width = Math.max (width, item.getPreferredWidth (gc)); |
| } |
| gc.dispose (); |
| } |
| } |
| if (width == 0) width = DEFAULT_WIDTH; |
| if (height == 0) height = DEFAULT_HEIGHT; |
| if (wHint != SWT.DEFAULT) width = wHint; |
| if (hHint != SWT.DEFAULT) height = hHint; |
| return new Point (width, height); |
| } |
| } |
| |
| void createHandle (int index) { |
| state |= HANDLE; |
| if (OS.GTK_VERSION >= OS.VERSION (2, 4, 0)) { |
| fixedHandle = OS.g_object_new (display.gtk_fixed_get_type (), 0); |
| if (fixedHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.gtk_fixed_set_has_window (fixedHandle, true); |
| handle = OS.gtk_vbox_new (false, 0); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| if ((style & SWT.V_SCROLL) != 0) { |
| scrolledHandle = OS.gtk_scrolled_window_new (0, 0); |
| if (scrolledHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| int vsp = (style & SWT.V_SCROLL) != 0 ? OS.GTK_POLICY_AUTOMATIC : OS.GTK_POLICY_NEVER; |
| OS.gtk_scrolled_window_set_policy (scrolledHandle, OS.GTK_POLICY_NEVER, vsp); |
| OS.gtk_container_add (fixedHandle, scrolledHandle); |
| OS.gtk_scrolled_window_add_with_viewport (scrolledHandle, handle); |
| } else { |
| OS.gtk_container_add (fixedHandle, handle); |
| } |
| OS.gtk_container_set_border_width (handle, 0); |
| } else { |
| int /*long*/ topHandle = OS.g_object_new (display.gtk_fixed_get_type (), 0); |
| if (topHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.gtk_fixed_set_has_window (topHandle, true); |
| if ((style & SWT.V_SCROLL) != 0) { |
| fixedHandle = topHandle; |
| scrolledHandle = OS.gtk_scrolled_window_new (0, 0); |
| if (scrolledHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| handle = OS.g_object_new (display.gtk_fixed_get_type (), 0); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.gtk_fixed_set_has_window (handle, true); |
| OS.gtk_container_add (fixedHandle, scrolledHandle); |
| |
| /* |
| * Force the scrolledWindow to have a single child that is |
| * not scrolled automatically. Calling gtk_container_add() |
| * seems to add the child correctly but cause a warning. |
| */ |
| boolean warnings = display.getWarnings (); |
| display.setWarnings (false); |
| OS.gtk_container_add (scrolledHandle, handle); |
| display.setWarnings (warnings); |
| } else { |
| handle = topHandle; |
| } |
| OS.GTK_WIDGET_SET_FLAGS (handle, OS.GTK_CAN_FOCUS); |
| } |
| } |
| |
| void createItem (ExpandItem item, int style, int index) { |
| if (!(0 <= index && index <= itemCount)) error (SWT.ERROR_INVALID_RANGE); |
| if (itemCount == items.length) { |
| ExpandItem [] newItems = new ExpandItem [itemCount + 4]; |
| System.arraycopy (items, 0, newItems, 0, items.length); |
| items = newItems; |
| } |
| System.arraycopy (items, index, items, index + 1, itemCount - index); |
| items [index] = item; |
| itemCount++; |
| if (OS.GTK_VERSION < OS.VERSION (2, 4, 0)) { |
| if (lastFocus == null) lastFocus = item; |
| } |
| item.width = Math.max (0, getClientArea ().width - spacing * 2); |
| layoutItems (index, true); |
| } |
| |
| void createWidget (int index) { |
| super.createWidget (index); |
| items = new ExpandItem [4]; |
| } |
| |
| void destroyItem (ExpandItem item) { |
| int index = 0; |
| while (index < itemCount) { |
| if (items [index] == item) break; |
| index++; |
| } |
| if (index == itemCount) return; |
| if (OS.GTK_VERSION < OS.VERSION (2, 4, 0)) { |
| if (item == lastFocus) { |
| int focusIndex = index > 0 ? index - 1 : 1; |
| if (focusIndex < itemCount) { |
| lastFocus = items [focusIndex]; |
| lastFocus.redraw (); |
| } else { |
| lastFocus = null; |
| } |
| } |
| } |
| System.arraycopy (items, index + 1, items, index, --itemCount - index); |
| items [itemCount] = null; |
| item.redraw (); |
| layoutItems (index, true); |
| } |
| |
| int /*long*/ eventHandle () { |
| return OS.GTK_VERSION >= OS.VERSION (2, 4, 0) ? fixedHandle : handle; |
| } |
| |
| boolean forceFocus (int /*long*/ focusHandle) { |
| if (OS.GTK_VERSION >= OS.VERSION (2, 4, 0)) { |
| if (lastFocus != null && lastFocus.setFocus ()) return true; |
| for (int i = 0; i < itemCount; i++) { |
| ExpandItem item = items [i]; |
| if (item.setFocus ()) return true; |
| } |
| } |
| return super.forceFocus (focusHandle); |
| } |
| |
| boolean hasFocus () { |
| if (OS.GTK_VERSION >= OS.VERSION (2, 4, 0)) { |
| for (int i=0; i<itemCount; i++) { |
| ExpandItem item = items [i]; |
| if (item.hasFocus ()) return true; |
| } |
| } |
| return super.hasFocus(); |
| } |
| |
| int getBandHeight () { |
| if (font == null) return ExpandItem.CHEVRON_SIZE; |
| GC gc = new GC (this); |
| FontMetrics metrics = gc.getFontMetrics (); |
| gc.dispose (); |
| return Math.max (ExpandItem.CHEVRON_SIZE, metrics.getHeight ()); |
| } |
| |
| GdkColor getForegroundColor () { |
| if (OS.GTK_VERSION < OS.VERSION (2, 4, 0)) { |
| if ((state & FOREGROUND) == 0) { |
| return display.getSystemColor (SWT.COLOR_TITLE_FOREGROUND).handle; |
| } |
| } |
| return super.getForegroundColor (); |
| } |
| |
| /** |
| * 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 ExpandItem getItem (int index) { |
| checkWidget(); |
| if (!(0 <= index && index < itemCount)) error (SWT.ERROR_INVALID_RANGE); |
| return items [index]; |
| } |
| |
| /** |
| * 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 itemCount; |
| } |
| |
| /** |
| * Returns an array of <code>ExpandItem</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 |
| * |
| * @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 ExpandItem [] getItems () { |
| checkWidget (); |
| ExpandItem [] result = new ExpandItem [itemCount]; |
| System.arraycopy (items, 0, result, 0, itemCount); |
| return result; |
| } |
| |
| /** |
| * Returns the receiver's spacing. |
| * |
| * @return the spacing |
| * |
| * @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 getSpacing () { |
| checkWidget (); |
| return spacing; |
| } |
| |
| int /*long*/ gtk_button_press_event (int /*long*/ widget, int /*long*/ event) { |
| if (OS.GTK_VERSION < OS.VERSION (2, 4, 0)) { |
| GdkEventButton gdkEvent = new GdkEventButton (); |
| OS.memmove (gdkEvent, event, GdkEventButton.sizeof); |
| int x = (int)gdkEvent.x; |
| int y = (int)gdkEvent.y; |
| for (int i = 0; i < itemCount; i++) { |
| ExpandItem item = items[i]; |
| boolean hover = item.x <= x && x < (item.x + item.width) && item.y <= y && y < (item.y + getBandHeight ()); |
| if (hover && item != lastFocus) { |
| lastFocus.redraw (); |
| lastFocus = item; |
| lastFocus.redraw (); |
| forceFocus (); |
| break; |
| } |
| } |
| } |
| return super.gtk_button_press_event (widget, event); |
| } |
| |
| int /*long*/ gtk_button_release_event (int /*long*/ widget, int /*long*/ event) { |
| if (OS.GTK_VERSION < OS.VERSION (2, 4, 0)) { |
| if (lastFocus != null) { |
| GdkEventButton gdkEvent = new GdkEventButton (); |
| OS.memmove (gdkEvent, event, GdkEventButton.sizeof); |
| int x = (int)gdkEvent.x; |
| int y = (int)gdkEvent.y; |
| boolean hover = lastFocus.x <= x && x < (lastFocus.x + lastFocus.width) && lastFocus.y <= y && y < (lastFocus.y + getBandHeight ()); |
| if (hover) { |
| Event ev = new Event (); |
| ev.item = lastFocus; |
| notifyListeners (lastFocus.expanded ? SWT.Collapse : SWT.Expand, ev); |
| lastFocus.expanded = !lastFocus.expanded; |
| showItem (lastFocus); |
| } |
| } |
| } |
| return super.gtk_button_release_event (widget, event); |
| } |
| |
| int /*long*/ gtk_expose_event (int /*long*/ widget, int /*long*/ eventPtr) { |
| if (OS.GTK_VERSION < OS.VERSION (2, 4, 0)) { |
| GdkEventExpose gdkEvent = new GdkEventExpose (); |
| OS.memmove(gdkEvent, eventPtr, GdkEventExpose.sizeof); |
| GCData data = new GCData (); |
| data.damageRgn = gdkEvent.region; |
| GC gc = GC.gtk_new (this, data); |
| OS.gdk_gc_set_clip_region (gc.handle, gdkEvent.region); |
| boolean hasFocus = isFocusControl (); |
| for (int i = 0; i < itemCount; i++) { |
| ExpandItem item = items [i]; |
| item.drawItem (gc, hasFocus && item == lastFocus); |
| } |
| gc.dispose (); |
| } |
| return super.gtk_expose_event (widget, eventPtr); |
| } |
| |
| int /*long*/ gtk_focus_in_event (int /*long*/ widget, int /*long*/ event) { |
| if (OS.GTK_VERSION < OS.VERSION (2, 4, 0)) { |
| if (lastFocus != null) lastFocus.redraw (); |
| } |
| return super.gtk_focus_in_event(widget, event); |
| } |
| |
| int /*long*/ gtk_focus_out_event (int /*long*/ widget, int /*long*/ event) { |
| if (OS.GTK_VERSION < OS.VERSION (2, 4, 0)) { |
| if (lastFocus != null) lastFocus.redraw (); |
| } |
| return super.gtk_focus_out_event (widget, event); |
| } |
| |
| int /*long*/ gtk_key_press_event (int /*long*/ widget, int /*long*/ event) { |
| if (OS.GTK_VERSION >= OS.VERSION (2, 4, 0)) { |
| if (!hasFocus ()) return 0; |
| int /*long*/ result = super.gtk_key_press_event (widget, event); |
| if (result != 0) return result; |
| int index = 0; |
| while (index < itemCount) { |
| if (items [index].hasFocus ()) break; |
| index++; |
| } |
| GdkEventKey gdkEvent = new GdkEventKey (); |
| OS.memmove (gdkEvent, event, GdkEventKey.sizeof); |
| boolean next = false; |
| switch (gdkEvent.keyval) { |
| case OS.GDK_Up: |
| case OS.GDK_Left: next = false; break; |
| case OS.GDK_Down: |
| case OS.GDK_Right: next = true; break; |
| default: return result; |
| } |
| int start = index, offset = next ? 1 : -1; |
| while ((index = (index + offset + itemCount) % itemCount) != start) { |
| ExpandItem item = items [index]; |
| if (item.setFocus ()) return result; |
| } |
| return result; |
| } else { |
| if (lastFocus != null) { |
| GdkEventKey keyEvent = new GdkEventKey (); |
| OS.memmove (keyEvent, event, GdkEventKey.sizeof); |
| switch (keyEvent.keyval) { |
| case OS.GDK_Return: |
| case OS.GDK_space: |
| Event ev = new Event (); |
| ev.item = lastFocus; |
| sendEvent (lastFocus.expanded ? SWT.Collapse :SWT.Expand, ev); |
| lastFocus.expanded = !lastFocus.expanded; |
| showItem (lastFocus); |
| break; |
| case OS.GDK_Up: |
| case OS.GDK_KP_Up: { |
| int focusIndex = indexOf (lastFocus); |
| if (focusIndex > 0) { |
| lastFocus.redraw (); |
| lastFocus = items [focusIndex - 1]; |
| lastFocus.redraw (); |
| } |
| break; |
| } |
| case OS.GDK_Down: |
| case OS.GDK_KP_Down: { |
| int focusIndex = indexOf (lastFocus); |
| if (focusIndex < itemCount - 1) { |
| lastFocus.redraw (); |
| lastFocus = items [focusIndex + 1]; |
| lastFocus.redraw (); |
| } |
| break; |
| } |
| } |
| } |
| } |
| return super.gtk_key_press_event (widget, event); |
| } |
| |
| /** |
| * Searches the receiver's list starting at the first item |
| * (index 0) until an item is found that is equal to the |
| * argument, and returns the index of that item. If no item |
| * is found, returns -1. |
| * |
| * @param item the search item |
| * @return the index of the item |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the item is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the item has been disposed</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 (ExpandItem item) { |
| checkWidget(); |
| if (item == null) error (SWT.ERROR_NULL_ARGUMENT); |
| for (int i = 0; i < itemCount; i++) { |
| if (items [i] == item) return i; |
| } |
| return -1; |
| } |
| |
| void layoutItems (int index, boolean setScrollbar) { |
| if (OS.GTK_VERSION >= OS.VERSION (2, 4, 0)) { |
| for (int i = 0; i < itemCount; i++) { |
| ExpandItem item = items [i]; |
| if (item != null) item.resizeControl (yCurrentScroll); |
| } |
| } else { |
| if (index < itemCount) { |
| int y = spacing - yCurrentScroll; |
| for (int i = 0; i < index; i++) { |
| ExpandItem item = items [i]; |
| if (item.expanded) y += item.height; |
| y += item.getHeaderHeight() + spacing; |
| } |
| for (int i = index; i < itemCount; i++) { |
| ExpandItem item = items [i]; |
| item.setBounds (spacing, y, 0, 0, true, false); |
| if (item.expanded) y += item.height; |
| y += item.getHeaderHeight() + spacing; |
| } |
| } |
| if (setScrollbar) setScrollbar (); |
| } |
| } |
| |
| int /*long*/ parentingHandle () { |
| return OS.GTK_VERSION >= OS.VERSION (2, 4, 0) ? fixedHandle : handle; |
| } |
| |
| void releaseChildren (boolean destroy) { |
| for (int i = 0; i < itemCount; i++) { |
| ExpandItem item = items [i]; |
| if (item != null && !item.isDisposed ()) { |
| item.release (false); |
| } |
| } |
| super.releaseChildren (destroy); |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when items in the receiver are expanded or collapsed. |
| * |
| * @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 ExpandListener |
| * @see #addExpandListener |
| */ |
| public void removeExpandListener (ExpandListener listener) { |
| checkWidget (); |
| if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (eventTable == null) return; |
| eventTable.unhook (SWT.Expand, listener); |
| eventTable.unhook (SWT.Collapse, listener); |
| } |
| |
| int setBounds (int x, int y, int width, int height, boolean move, boolean resize) { |
| int result = super.setBounds (x, y, width, height, move, resize); |
| if (OS.GTK_VERSION < OS.VERSION (2, 4, 0)) { |
| if (resize) { |
| if ((style & SWT.V_SCROLL) != 0) { |
| setScrollbar (); |
| } else { |
| for (int i = 0; i < itemCount; i++) { |
| ExpandItem item = items [i]; |
| int newWidth = Math.max (0, getClientArea ().width - spacing * 2); |
| if (item.width != newWidth) { |
| item.setBounds (0, 0, newWidth, item.height, false, true); |
| } |
| } |
| } |
| } |
| } |
| return result; |
| } |
| |
| void setFontDescription (int /*long*/ font) { |
| super.setFontDescription (font); |
| if (OS.GTK_VERSION >= OS.VERSION (2, 4, 0)) { |
| for (int i = 0; i < itemCount; i++) { |
| items[i].setFontDescription (font); |
| } |
| layoutItems (0, true); |
| } |
| } |
| |
| void setForegroundColor (GdkColor color) { |
| super.setForegroundColor (color); |
| if (OS.GTK_VERSION >= OS.VERSION (2, 4, 0)) { |
| for (int i = 0; i < itemCount; i++) { |
| items[i].setForegroundColor (color); |
| } |
| } |
| } |
| |
| void setScrollbar () { |
| if (itemCount == 0) return; |
| if ((style & SWT.V_SCROLL) == 0) return; |
| int height = getClientArea ().height; |
| ExpandItem item = items [itemCount - 1]; |
| int maxHeight = item.y + getBandHeight () + spacing; |
| if (item.expanded) maxHeight += item.height; |
| int /*long*/ adjustmentHandle = OS.gtk_scrolled_window_get_vadjustment (scrolledHandle); |
| GtkAdjustment adjustment = new GtkAdjustment (); |
| OS.memmove (adjustment, adjustmentHandle); |
| yCurrentScroll = (int)adjustment.value; |
| |
| //claim bottom free space |
| if (yCurrentScroll > 0 && height > maxHeight) { |
| yCurrentScroll = Math.max (0, yCurrentScroll + maxHeight - height); |
| layoutItems (0, false); |
| } |
| maxHeight += yCurrentScroll; |
| adjustment.value = Math.min (yCurrentScroll, maxHeight); |
| adjustment.upper = maxHeight; |
| adjustment.page_size = height; |
| OS.memmove (adjustmentHandle, adjustment); |
| OS.gtk_adjustment_changed (adjustmentHandle); |
| int policy = maxHeight > height ? OS.GTK_POLICY_ALWAYS : OS.GTK_POLICY_NEVER; |
| OS.gtk_scrolled_window_set_policy (scrolledHandle, OS.GTK_POLICY_NEVER, policy); |
| int width = OS.GTK_WIDGET_WIDTH (fixedHandle) - spacing * 2; |
| if (policy == OS.GTK_POLICY_ALWAYS) { |
| int /*long*/ vHandle = OS.GTK_SCROLLED_WINDOW_VSCROLLBAR (scrolledHandle); |
| GtkRequisition requisition = new GtkRequisition (); |
| OS.gtk_widget_size_request (vHandle, requisition); |
| width -= requisition.width; |
| } |
| width = Math.max (0, width); |
| for (int i = 0; i < itemCount; i++) { |
| ExpandItem item2 = items[i]; |
| item2.setBounds (0, 0, width, item2.height, false, true); |
| } |
| } |
| |
| /** |
| * Sets the receiver's spacing. Spacing specifies the number of pixels allocated around |
| * each item. |
| * |
| * @param spacing the spacing around each 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 setSpacing (int spacing) { |
| checkWidget (); |
| if (spacing < 0) return; |
| if (spacing == this.spacing) return; |
| this.spacing = spacing; |
| if (OS.GTK_VERSION >= OS.VERSION (2, 4, 0)) { |
| OS.gtk_box_set_spacing (handle, spacing); |
| OS.gtk_container_set_border_width (handle, spacing); |
| } else { |
| if ((style & SWT.V_SCROLL) == 0) { |
| int width = Math.max (0, getClientArea ().width - spacing * 2); |
| for (int i = 0; i < itemCount; i++) { |
| ExpandItem item = items [i]; |
| if (item.width != width) item.setBounds (0, 0, width, item.height, false, true); |
| } |
| } |
| layoutItems (0, true); |
| redraw (); |
| } |
| } |
| |
| void showItem (ExpandItem item) { |
| Control control = item.control; |
| if (control != null && !control.isDisposed ()) { |
| control.setVisible (item.expanded); |
| } |
| item.redraw (); |
| int index = indexOf (item); |
| layoutItems (index + 1, true); |
| } |
| |
| void updateScrollBarValue (ScrollBar bar) { |
| yCurrentScroll = bar.getSelection(); |
| layoutItems (0, false); |
| } |
| } |