| /******************************************************************************* |
| * Copyright (c) 2000, 2007 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.internal.wpf.*; |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| |
| /** |
| * Instances of this class are controls which are capable |
| * of containing other controls. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>NO_BACKGROUND, NO_FOCUS, NO_MERGE_PAINTS, NO_REDRAW_RESIZE, NO_RADIO_GROUP, EMBEDDED, DOUBLE_BUFFERED</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>(none)</dd> |
| * </dl> |
| * <p> |
| * Note: The <code>NO_BACKGROUND</code>, <code>NO_FOCUS</code>, <code>NO_MERGE_PAINTS</code>, |
| * and <code>NO_REDRAW_RESIZE</code> styles are intended for use with <code>Canvas</code>. |
| * They can be used with <code>Composite</code> if you are drawing your own, but their |
| * behavior is undefined if they are used with subclasses of <code>Composite</code> other |
| * than <code>Canvas</code>. |
| * </p><p> |
| * Note: The <code>CENTER</code> style, although undefined for composites, has the |
| * same value as <code>EMBEDDED</code> (which is used to embed widgets from other |
| * widget toolkits into SWT). On some operating systems (GTK, Motif), this may cause |
| * the children of this composite to be obscured. The <code>EMBEDDED</code> style |
| * is for use by other widget toolkits and should normally never be used. |
| * </p><p> |
| * This class may be subclassed by custom control implementors |
| * who are building controls that are constructed from aggregates |
| * of other controls. |
| * </p> |
| * |
| * @see Canvas |
| */ |
| |
| public class Composite extends Scrollable { |
| Layout layout; |
| Control [] tabList; |
| int layoutCount, backgroundMode; |
| |
| /** |
| * Prevents uninitialized instances from being created outside the package. |
| */ |
| Composite () { |
| } |
| |
| /** |
| * 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 widget which will be the parent of the new instance (cannot be null) |
| * @param style the style of widget 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> |
| * </ul> |
| * |
| * @see SWT#NO_BACKGROUND |
| * @see SWT#NO_FOCUS |
| * @see SWT#NO_MERGE_PAINTS |
| * @see SWT#NO_REDRAW_RESIZE |
| * @see SWT#NO_RADIO_GROUP |
| * @see Widget#getStyle |
| */ |
| public Composite (Composite parent, int style) { |
| super (parent, style); |
| } |
| |
| int getCaretHandle () { |
| return 0; |
| } |
| |
| Control [] _getChildren () { |
| int parentHandle = parentingHandle (); |
| int elements = OS.Panel_Children (parentHandle); |
| int count = OS.UIElementCollection_Count (elements); |
| int caretHandle = getCaretHandle (); |
| if (caretHandle != 0) count--; |
| Control [] children = new Control [count]; |
| int index = count - 1; |
| if (count != 0) { |
| int enumerator = OS.UIElementCollection_GetEnumerator (elements); |
| while (OS.IEnumerator_MoveNext (enumerator)) { |
| int current = OS.UIElementCollection_Current (enumerator); |
| if (caretHandle != 0 && OS.Object_Equals(caretHandle, current)) { |
| OS.GCHandle_Free (current); |
| continue; |
| } |
| Widget widget = display.getWidget (current); |
| if (widget != null && widget != this) { |
| if (widget instanceof Control) { |
| children [index--] = (Control)widget; |
| } |
| } |
| OS.GCHandle_Free (current); |
| } |
| OS.GCHandle_Free (enumerator); |
| } |
| OS.GCHandle_Free (elements); |
| if (index == -1) return children; |
| Control [] newChildren = new Control [count - index - 1]; |
| System.arraycopy (children, index + 1, newChildren, 0, newChildren.length); |
| return newChildren; |
| } |
| |
| Control [] _getTabList () { |
| if (tabList == null) return tabList; |
| int count = 0; |
| for (int i=0; i<tabList.length; i++) { |
| if (!tabList [i].isDisposed ()) count++; |
| } |
| if (count == tabList.length) return tabList; |
| Control [] newList = new Control [count]; |
| int index = 0; |
| for (int i=0; i<tabList.length; i++) { |
| if (!tabList [i].isDisposed ()) { |
| newList [index++] = tabList [i]; |
| } |
| } |
| tabList = newList; |
| return tabList; |
| } |
| |
| void addChild (Control control) { |
| int parentHandle = parentingHandle (); |
| int children = OS.Panel_Children (parentHandle); |
| int index = 0; |
| if (parentHandle != handle) { |
| if (OS.UIElementCollection_Contains (children, handle)) { |
| index = 1; |
| } |
| } |
| int topHandle = control.topHandle (); |
| OS.UIElementCollection_Insert (children, index, topHandle); |
| OS.GCHandle_Free (children); |
| OS.FrameworkElement_Width (topHandle, 0); |
| OS.FrameworkElement_Height (topHandle, 0); |
| } |
| |
| int backgoundProperty () { |
| return OS.Panel_BackgroundProperty(); |
| } |
| |
| /** |
| * Clears any data that has been cached by a Layout for all widgets that |
| * are in the parent hierarchy of the changed control up to and including the |
| * receiver. If an ancestor does not have a layout, it is skipped. |
| * |
| * @param changed an array of controls that changed state and require a recalculation of size |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the changed array is null any of its controls are null or have been disposed</li> |
| * <li>ERROR_INVALID_PARENT - if any control in changed is not in the widget tree of the receiver</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> |
| * |
| * @since 3.1 |
| */ |
| public void changed (Control[] changed) { |
| checkWidget (); |
| if (changed == null) error (SWT.ERROR_INVALID_ARGUMENT); |
| for (int i=0; i<changed.length; i++) { |
| Control control = changed [i]; |
| if (control == null) error (SWT.ERROR_INVALID_ARGUMENT); |
| if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); |
| boolean ancestor = false; |
| Composite composite = control.parent; |
| while (composite != null) { |
| ancestor = composite == this; |
| if (ancestor) break; |
| composite = composite.parent; |
| } |
| if (!ancestor) error (SWT.ERROR_INVALID_PARENT); |
| } |
| for (int i=0; i<changed.length; i++) { |
| Control child = changed [i]; |
| Composite composite = child.parent; |
| while (child != this) { |
| if (composite.layout == null || !composite.layout.flushCache (child)) { |
| composite.state |= LAYOUT_CHANGED; |
| } |
| child = composite; |
| composite = child.parent; |
| } |
| } |
| } |
| |
| protected void checkSubclass () { |
| /* Do nothing - Subclassing is allowed */ |
| } |
| |
| Control [] computeTabList () { |
| Control result [] = super.computeTabList (); |
| if (result.length == 0) return result; |
| Control [] list = tabList != null ? _getTabList () : _getChildren (); |
| for (int i=0; i<list.length; i++) { |
| Control child = list [i]; |
| Control [] childList = child.computeTabList (); |
| if (childList.length != 0) { |
| Control [] newResult = new Control [result.length + childList.length]; |
| System.arraycopy (result, 0, newResult, 0, result.length); |
| System.arraycopy (childList, 0, newResult, result.length, childList.length); |
| result = newResult; |
| } |
| } |
| return result; |
| } |
| |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget (); |
| Point size; |
| if (layout != null) { |
| if (wHint == SWT.DEFAULT || hHint == SWT.DEFAULT) { |
| changed |= (state & LAYOUT_CHANGED) != 0; |
| state &= ~LAYOUT_CHANGED; |
| size = layout.computeSize (this, wHint, hHint, changed); |
| } else { |
| size = new Point (wHint, hHint); |
| } |
| } else { |
| size = minimumSize (wHint, hHint, changed); |
| } |
| if (size.x == 0) size.x = DEFAULT_WIDTH; |
| if (size.y == 0) size.y = DEFAULT_HEIGHT; |
| if (wHint != SWT.DEFAULT) size.x = wHint; |
| if (hHint != SWT.DEFAULT) size.y = hHint; |
| Rectangle trim = computeTrim (0, 0, size.x, size.y); |
| return new Point (trim.width, trim.height); |
| } |
| |
| void createHandle () { |
| state |= CANVAS; |
| if ((style & (SWT.H_SCROLL | SWT.V_SCROLL)) == 0) { |
| state |= THEME_BACKGROUND; |
| } |
| boolean scrolled = (style & (SWT.H_SCROLL | SWT.V_SCROLL)) != 0; |
| createHandle (scrolled, false); |
| } |
| |
| void createHandle (boolean scrolled, boolean menubar) { |
| handle = OS.gcnew_SWTCanvas (jniRef); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.FrameworkElement_FocusVisualStyle (handle, 0); |
| if ((style & SWT.NO_FOCUS) == 0) { |
| OS.UIElement_Focusable (handle, true); |
| } |
| if (scrolled || menubar) { |
| scrolledHandle = OS.gcnew_Grid (); |
| if (scrolledHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| |
| /* Create grid definition */ |
| int gridLength = OS.gcnew_GridLength (1, OS.GridUnitType_Auto); |
| if (gridLength == 0) error (SWT.ERROR_NO_HANDLES); |
| int columnDefinitions = OS.Grid_ColumnDefinitions (scrolledHandle); |
| int column0 = OS.gcnew_ColumnDefinition (); |
| if (column0 == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.ColumnDefinitionCollection_Add (columnDefinitions, column0); |
| int column1 = OS.gcnew_ColumnDefinition (); |
| if (column1 == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.ColumnDefinition_Width (column1, gridLength); |
| OS.ColumnDefinitionCollection_Add (columnDefinitions, column1); |
| int rowDefinitions = OS.Grid_RowDefinitions (scrolledHandle); |
| int row0 = OS.gcnew_RowDefinition (); |
| if (row0 == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.RowDefinition_Height (row0, gridLength); |
| OS.RowDefinitionCollection_Add (rowDefinitions, row0); |
| int row1 = OS.gcnew_RowDefinition (); |
| if (row1 == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.RowDefinitionCollection_Add (rowDefinitions, row1); |
| int row2 = OS.gcnew_RowDefinition (); |
| if (row2 == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.RowDefinition_Height (row2, gridLength); |
| OS.RowDefinitionCollection_Add (rowDefinitions, row2); |
| OS.GCHandle_Free (column0); |
| OS.GCHandle_Free (column1); |
| OS.GCHandle_Free (row0); |
| OS.GCHandle_Free (row1); |
| OS.GCHandle_Free (row2); |
| OS.GCHandle_Free (gridLength); |
| OS.GCHandle_Free (columnDefinitions); |
| OS.GCHandle_Free (rowDefinitions); |
| |
| /* create children */ |
| int children = OS.Panel_Children (scrolledHandle); |
| OS.UIElementCollection_Add (children, handle); |
| OS.Grid_SetRow (handle, 1); |
| OS.Grid_SetColumn (handle, 0); |
| if ((style & SWT.V_SCROLL) != 0) { |
| int vScroll = OS.gcnew_ScrollBar (); |
| if (vScroll == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.ScrollBar_Orientation (vScroll, OS.Orientation_Vertical); |
| OS.RangeBase_Maximum(vScroll, 90); |
| OS.RangeBase_LargeChange (vScroll, 10); |
| OS.ScrollBar_ViewportSize (vScroll, 10); |
| OS.Grid_SetRow (vScroll, 1); |
| OS.Grid_SetColumn (vScroll, 1); |
| OS.UIElementCollection_Add (children, vScroll); |
| OS.GCHandle_Free (vScroll); |
| } |
| if ((style & SWT.H_SCROLL) != 0) { |
| int hScroll = OS.gcnew_ScrollBar (); |
| if (hScroll == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.ScrollBar_Orientation (hScroll, OS.Orientation_Horizontal); |
| OS.RangeBase_Maximum (hScroll, 90); |
| OS.RangeBase_LargeChange (hScroll, 10); |
| OS.ScrollBar_ViewportSize (hScroll, 10); |
| OS.Grid_SetRow (hScroll, 2); |
| OS.Grid_SetColumn (hScroll, 0); |
| OS.UIElementCollection_Add (children, hScroll); |
| OS.GCHandle_Free (hScroll); |
| } |
| OS.GCHandle_Free (children); |
| } |
| } |
| |
| int defaultBackground () { |
| if ((state & CANVAS) != 0) { |
| return OS.SystemColors_ControlColor; |
| } |
| return 0; |
| } |
| |
| void enableWidget (boolean enabled) { |
| if ((state & CANVAS) != 0) { |
| OS.UIElement_IsHitTestVisible (topHandle (), enabled); |
| } else { |
| OS.UIElement_IsEnabled (handle, enabled); |
| OS.UIElement_IsHitTestVisible (parentingHandle (), enabled); |
| } |
| } |
| |
| Composite findDeferredControl () { |
| return layoutCount > 0 ? this : parent.findDeferredControl (); |
| } |
| |
| Menu [] findMenus (Control control) { |
| if (control == this) return new Menu [0]; |
| Menu result [] = super.findMenus (control); |
| Control [] children = _getChildren (); |
| for (int i=0; i<children.length; i++) { |
| Control child = children [i]; |
| Menu [] menuList = child.findMenus (control); |
| if (menuList.length != 0) { |
| Menu [] newResult = new Menu [result.length + menuList.length]; |
| System.arraycopy (result, 0, newResult, 0, result.length); |
| System.arraycopy (menuList, 0, newResult, result.length, menuList.length); |
| result = newResult; |
| } |
| } |
| return result; |
| } |
| |
| void fixScrollbarVisibility () { |
| } |
| |
| void fixTabList (Control control) { |
| if (tabList == null) return; |
| int count = 0; |
| for (int i=0; i<tabList.length; i++) { |
| if (tabList [i] == control) count++; |
| } |
| if (count == 0) return; |
| Control [] newList = null; |
| int length = tabList.length - count; |
| if (length != 0) { |
| newList = new Control [length]; |
| int index = 0; |
| for (int i=0; i<tabList.length; i++) { |
| if (tabList [i] != control) { |
| newList [index++] = tabList [i]; |
| } |
| } |
| } |
| tabList = newList; |
| } |
| |
| /** |
| * Returns the receiver's background drawing mode. This |
| * will be one of the following constants defined in class |
| * <code>SWT</code>: |
| * <code>INHERIT_NONE</code>, <code>INHERIT_DEFAULT</code>, |
| * <code>INHERTIT_FORCE</code>. |
| * |
| * @return the background mode |
| * |
| * @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 SWT |
| * |
| * @since 3.2 |
| */ |
| public int getBackgroundMode () { |
| checkWidget (); |
| return backgroundMode; |
| } |
| |
| /** |
| * Returns a (possibly empty) array containing the receiver's children. |
| * Children are returned in the order that they are drawn. The topmost |
| * control appears at the beginning of the array. Subsequent controls |
| * draw beneath this control and appear later in the array. |
| * <p> |
| * Note: This is not the actual structure used by the receiver |
| * to maintain its list of children, so modifying the array will |
| * not affect the receiver. |
| * </p> |
| * |
| * @return an array of children |
| * |
| * @see Control#moveAbove |
| * @see Control#moveBelow |
| * |
| * @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 Control [] getChildren () { |
| checkWidget (); |
| return _getChildren (); |
| } |
| |
| /** |
| * Returns layout which is associated with the receiver, or |
| * null if one has not been set. |
| * |
| * @return the receiver's layout or null |
| * |
| * @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 Layout getLayout () { |
| checkWidget (); |
| return layout; |
| } |
| |
| Point getLocation (Control child) { |
| int topHandle = child.topHandle (); |
| int x = (int) OS.Canvas_GetLeft (topHandle); |
| int y = (int) OS.Canvas_GetTop (topHandle); |
| return new Point (x, y); |
| } |
| |
| /** |
| * Gets the (possibly empty) tabbing order for the control. |
| * |
| * @return tabList the ordered list of controls representing the tab order |
| * |
| * @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 #setTabList |
| */ |
| public Control [] getTabList () { |
| checkWidget (); |
| Control [] tabList = _getTabList (); |
| if (tabList == null) { |
| int count = 0; |
| Control [] list =_getChildren (); |
| for (int i=0; i<list.length; i++) { |
| if (list [i].isTabGroup ()) count++; |
| } |
| tabList = new Control [count]; |
| int index = 0; |
| for (int i=0; i<list.length; i++) { |
| if (list [i].isTabGroup ()) { |
| tabList [index++] = list [i]; |
| } |
| } |
| } |
| return tabList; |
| } |
| |
| boolean hooksKeys () { |
| return hooks (SWT.KeyDown) || hooks (SWT.KeyUp); |
| } |
| |
| /** |
| * Returns <code>true</code> if the receiver has deferred |
| * the performing of layout, and <code>false</code> otherwise. |
| * |
| * @return the receiver's deferred layout state |
| * |
| * @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 #setLayoutDeferred(boolean) |
| * @see #isLayoutDeferred() |
| * |
| * @since 3.1 |
| */ |
| public boolean getLayoutDeferred () { |
| checkWidget (); |
| return layoutCount > 0 ; |
| } |
| |
| void HandlePreviewKeyDown (int sender, int e) { |
| super.HandlePreviewKeyDown (sender, e); |
| if (!checkEvent (e)) return; |
| /* |
| * In WPF arrows key move the focus around, this |
| * behavior is not expected in SWT. |
| */ |
| if ((state & CANVAS) != 0) { |
| int key = OS.KeyEventArgs_Key (e); |
| switch (key) { |
| case OS.Key_Up: |
| case OS.Key_Left: |
| case OS.Key_Down: |
| case OS.Key_Right: { |
| OS.RoutedEventArgs_Handled (e, true); |
| break; |
| } |
| } |
| } |
| } |
| |
| void HandlePreviewMouseDown(int sender, int e) { |
| if (!checkEvent (e)) return; |
| super.HandlePreviewMouseDown (sender, e); |
| |
| /* Set focus for a canvas with no children */ |
| if ((state & CANVAS) != 0) { |
| if ((style & SWT.NO_FOCUS) == 0 && hooksKeys ()) { |
| int children = OS.Panel_Children (handle); |
| int count = OS.UIElementCollection_Count (children); |
| OS.GCHandle_Free (children); |
| int caretHandle = getCaretHandle (); |
| if (caretHandle != 0) count--; |
| if (count == 0) { |
| OS.UIElement_Focus (handle); |
| } |
| } |
| } |
| } |
| |
| void HandlePreviewTextInput(int sender, int e) { |
| super.HandlePreviewTextInput (sender, e); |
| if (!checkEvent (e)) return; |
| if ((state & CANVAS) != 0) { |
| OS.RoutedEventArgs_Handled (e, true); |
| } |
| } |
| |
| /** |
| * Returns <code>true</code> if the receiver or any ancestor |
| * up to and including the receiver's nearest ancestor shell |
| * has deferred the performing of layouts. Otherwise, <code>false</code> |
| * is returned. |
| * |
| * @return the receiver's deferred layout state |
| * |
| * @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 #setLayoutDeferred(boolean) |
| * @see #getLayoutDeferred() |
| * |
| * @since 3.1 |
| */ |
| public boolean isLayoutDeferred () { |
| checkWidget (); |
| return findDeferredControl () != null; |
| } |
| |
| boolean isTabGroup() { |
| if ((state & CANVAS) != 0) return true; |
| return super.isTabGroup(); |
| } |
| |
| /** |
| * If the receiver has a layout, asks the layout to <em>lay out</em> |
| * (that is, set the size and location of) the receiver's children. |
| * If the receiver does not have a layout, do nothing. |
| * <p> |
| * This is equivalent to calling <code>layout(true)</code>. |
| * </p> |
| * <p> |
| * Note: Layout is different from painting. If a child is |
| * moved or resized such that an area in the parent is |
| * exposed, then the parent will paint. If no child is |
| * affected, the parent will not paint. |
| * </p> |
| * |
| * @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 layout () { |
| checkWidget (); |
| layout (true); |
| } |
| |
| /** |
| * If the receiver has a layout, asks the layout to <em>lay out</em> |
| * (that is, set the size and location of) the receiver's children. |
| * If the argument is <code>true</code> the layout must not rely |
| * on any information it has cached about the immediate children. If it |
| * is <code>false</code> the layout may (potentially) optimize the |
| * work it is doing by assuming that none of the receiver's |
| * children has changed state since the last layout. |
| * If the receiver does not have a layout, do nothing. |
| * <p> |
| * If a child is resized as a result of a call to layout, the |
| * resize event will invoke the layout of the child. The layout |
| * will cascade down through all child widgets in the receiver's widget |
| * tree until a child is encountered that does not resize. Note that |
| * a layout due to a resize will not flush any cached information |
| * (same as <code>layout(false)</code>). |
| * </p> |
| * <p> |
| * Note: Layout is different from painting. If a child is |
| * moved or resized such that an area in the parent is |
| * exposed, then the parent will paint. If no child is |
| * affected, the parent will not paint. |
| * </p> |
| * |
| * @param changed <code>true</code> if the layout must flush its caches, and <code>false</code> otherwise |
| * |
| * @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 layout (boolean changed) { |
| checkWidget (); |
| if (layout == null) return; |
| layout (changed, false); |
| } |
| |
| /** |
| * If the receiver has a layout, asks the layout to <em>lay out</em> |
| * (that is, set the size and location of) the receiver's children. |
| * If the changed argument is <code>true</code> the layout must not rely |
| * on any information it has cached about its children. If it |
| * is <code>false</code> the layout may (potentially) optimize the |
| * work it is doing by assuming that none of the receiver's |
| * children has changed state since the last layout. |
| * If the all argument is <code>true</code> the layout will cascade down |
| * through all child widgets in the receiver's widget tree, regardless of |
| * whether the child has changed size. The changed argument is applied to |
| * all layouts. If the all argument is <code>false</code>, the layout will |
| * <em>not</em> cascade down through all child widgets in the receiver's widget |
| * tree. However, if a child is resized as a result of a call to layout, the |
| * resize event will invoke the layout of the child. Note that |
| * a layout due to a resize will not flush any cached information |
| * (same as <code>layout(false)</code>). |
| * </p> |
| * <p> |
| * Note: Layout is different from painting. If a child is |
| * moved or resized such that an area in the parent is |
| * exposed, then the parent will paint. If no child is |
| * affected, the parent will not paint. |
| * </p> |
| * |
| * @param changed <code>true</code> if the layout must flush its caches, and <code>false</code> otherwise |
| * @param all <code>true</code> if all children in the receiver's widget tree should be laid out, and <code>false</code> otherwise |
| * |
| * @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> |
| * |
| * @since 3.1 |
| */ |
| public void layout (boolean changed, boolean all) { |
| checkWidget (); |
| if (layout == null && !all) return; |
| markLayout (changed, all); |
| updateLayout (true, all); |
| } |
| |
| /** |
| * Forces a lay out (that is, sets the size and location) of all widgets that |
| * are in the parent hierarchy of the changed control up to and including the |
| * receiver. The layouts in the hierarchy must not rely on any information |
| * cached about the changed control or any of its ancestors. The layout may |
| * (potentially) optimize the work it is doing by assuming that none of the |
| * peers of the changed control have changed state since the last layout. |
| * If an ancestor does not have a layout, skip it. |
| * <p> |
| * Note: Layout is different from painting. If a child is |
| * moved or resized such that an area in the parent is |
| * exposed, then the parent will paint. If no child is |
| * affected, the parent will not paint. |
| * </p> |
| * |
| * @param changed a control that has had a state change which requires a recalculation of its size |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the changed array is null any of its controls are null or have been disposed</li> |
| * <li>ERROR_INVALID_PARENT - if any control in changed is not in the widget tree of the receiver</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> |
| * |
| * @since 3.1 |
| */ |
| public void layout (Control [] changed) { |
| checkWidget (); |
| if (changed == null) error (SWT.ERROR_INVALID_ARGUMENT); |
| for (int i=0; i<changed.length; i++) { |
| Control control = changed [i]; |
| if (control == null) error (SWT.ERROR_INVALID_ARGUMENT); |
| if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); |
| boolean ancestor = false; |
| Composite composite = control.parent; |
| while (composite != null) { |
| ancestor = composite == this; |
| if (ancestor) break; |
| composite = composite.parent; |
| } |
| if (!ancestor) error (SWT.ERROR_INVALID_PARENT); |
| } |
| int updateCount = 0; |
| Composite [] update = new Composite [16]; |
| for (int i=0; i<changed.length; i++) { |
| Control child = changed [i]; |
| Composite composite = child.parent; |
| while (child != this) { |
| if (composite.layout != null) { |
| composite.state |= LAYOUT_NEEDED; |
| if (!composite.layout.flushCache (child)) { |
| composite.state |= LAYOUT_CHANGED; |
| } |
| } |
| if (updateCount == update.length) { |
| Composite [] newUpdate = new Composite [update.length + 16]; |
| System.arraycopy (update, 0, newUpdate, 0, update.length); |
| update = newUpdate; |
| } |
| child = update [updateCount++] = composite; |
| composite = child.parent; |
| } |
| } |
| for (int i=updateCount-1; i>=0; i--) { |
| update [i].updateLayout (true, false); |
| } |
| } |
| |
| void OnRender(int drawingContext) { |
| if (isDisposed ()) return; |
| OS.SWTCanvas_Visual (handle, 0); |
| if (display.ignoreRender) { |
| display.addInvalidate (this); |
| return; |
| } |
| if (!hooks (SWT.Paint)) return; |
| int width = (int)OS.FrameworkElement_ActualWidth (handle); |
| int height = (int)OS.FrameworkElement_ActualHeight (handle); |
| if (width != 0 && height != 0) { |
| GCData data = new GCData (); |
| data.device = display; |
| data.drawingContext = drawingContext; |
| GC gc = GC.wpf_new (this, data); |
| Event event = new Event (); |
| event.gc = gc; |
| event.width = width; |
| event.height = height; |
| sendEvent (SWT.Paint, event); |
| event.gc = null; |
| gc.dispose (); |
| } |
| } |
| |
| void markLayout (boolean changed, boolean all) { |
| if (layout != null) { |
| state |= LAYOUT_NEEDED; |
| if (changed) state |= LAYOUT_CHANGED; |
| } |
| if (all) { |
| Control [] children = _getChildren (); |
| for (int i=0; i<children.length; i++) { |
| children [i].markLayout (changed, all); |
| } |
| } |
| } |
| |
| Point minimumSize (int wHint, int hHint, boolean changed) { |
| Control [] children = _getChildren (); |
| int width = 0, height = 0; |
| for (int i=0; i<children.length; i++) { |
| Rectangle rect = children [i].getBounds (); |
| width = Math.max (width, rect.x + rect.width); |
| height = Math.max (height, rect.y + rect.height); |
| } |
| return new Point (width, height); |
| } |
| |
| int parentingHandle () { |
| return handle; |
| } |
| |
| void releaseChildren (boolean destroy) { |
| Control [] children = _getChildren (); |
| for (int i=0; i<children.length; i++) { |
| Control child = children [i]; |
| if (child != null && !child.isDisposed ()) { |
| child.release (false); |
| } |
| } |
| super.releaseChildren (destroy); |
| } |
| |
| void releaseWidget () { |
| super.releaseWidget (); |
| // if ((state & CANVAS) != 0 && (style & SWT.EMBEDDED) != 0) { |
| // int hwndChild = OS.GetWindow (handle, OS.GW_CHILD); |
| // if (hwndChild != 0) { |
| // int threadId = OS.GetWindowThreadProcessId (hwndChild, null); |
| // if (threadId != OS.GetCurrentThreadId ()) { |
| // OS.ShowWindow (hwndChild, OS.SW_HIDE); |
| // OS.SetParent (hwndChild, 0); |
| // } |
| // } |
| // } |
| layout = null; |
| tabList = null; |
| } |
| |
| void removeChild (Control control) { |
| int topHandle = control.topHandle (); |
| int parentHandle = parentingHandle (); |
| int children = OS.Panel_Children (parentHandle); |
| OS.UIElementCollection_Remove (children, topHandle); |
| OS.GCHandle_Free (children); |
| } |
| |
| void removeControl (Control control) { |
| fixTabList (control); |
| } |
| |
| void setBackgroundBrush (int brush) { |
| if (brush != 0) { |
| OS.Panel_Background (handle, brush); |
| } else { |
| int property = OS.Panel_BackgroundProperty (); |
| OS.DependencyObject_ClearValue (handle, property); |
| OS.GCHandle_Free (property); |
| } |
| } |
| |
| /** |
| * Sets the background drawing mode to the argument which should |
| * be one of the following constants defined in class <code>SWT</code>: |
| * <code>INHERIT_NONE</code>, <code>INHERIT_DEFAULT</code>, |
| * <code>INHERIT_FORCE</code>. |
| * |
| * @param mode the new background mode |
| * |
| * @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 SWT |
| * |
| * @since 3.2 |
| */ |
| public void setBackgroundMode (int mode) { |
| checkWidget (); |
| backgroundMode = mode; |
| Control [] children = _getChildren (); |
| for (int i = 0; i < children.length; i++) { |
| children [i].updateBackgroundMode (); |
| } |
| } |
| |
| int setBounds (int x, int y, int width, int height, int flags) { |
| int result = super.setBounds (x, y, width, height, flags); |
| if ((result & RESIZED) != 0 && layout != null) { |
| markLayout (false, false); |
| updateLayout (false, false); |
| } |
| return result; |
| } |
| |
| void setClipping () { |
| OS.UIElement_ClipToBounds (topHandle (), true); |
| } |
| |
| public boolean setFocus () { |
| checkWidget(); |
| Control [] children = _getChildren (); |
| for (int i=0; i<children.length; i++) { |
| Control child = children [i]; |
| if (child.getVisible () && child.setFocus ()) return true; |
| } |
| return super.setFocus (); |
| } |
| |
| void setFont (int font, double size) { |
| } |
| |
| void setForegroundBrush (int brush) { |
| OS.UIElement_InvalidateVisual (handle); |
| } |
| |
| /** |
| * Sets the layout which is associated with the receiver to be |
| * the argument which may be null. |
| * |
| * @param layout the receiver's new layout or null |
| * |
| * @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 setLayout (Layout layout) { |
| checkWidget (); |
| this.layout = layout; |
| } |
| |
| /** |
| * If the argument is <code>true</code>, causes subsequent layout |
| * operations in the receiver or any of its children to be ignored. |
| * No layout of any kind can occur in the receiver or any of its |
| * children until the flag is set to false. |
| * Layout operations that occurred while the flag was |
| * <code>true</code> are remembered and when the flag is set to |
| * <code>false</code>, the layout operations are performed in an |
| * optimized manner. Nested calls to this method are stacked. |
| * |
| * @param defer the new defer state |
| * |
| * @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 #layout(boolean) |
| * @see #layout(Control[]) |
| * |
| * @since 3.1 |
| */ |
| public void setLayoutDeferred (boolean defer) { |
| if (!defer) { |
| if (--layoutCount == 0) { |
| if ((state & LAYOUT_CHILD) != 0 || (state & LAYOUT_NEEDED) != 0) { |
| updateLayout (true, true); |
| } |
| } |
| } else { |
| layoutCount++; |
| } |
| } |
| |
| /** |
| * Sets the tabbing order for the specified controls to |
| * match the order that they occur in the argument list. |
| * |
| * @param tabList the ordered list of controls representing the tab order or null |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if a widget in the tabList is null or has been disposed</li> |
| * <li>ERROR_INVALID_PARENT - if widget in the tabList is not in the same widget tree</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 setTabList (Control [] tabList) { |
| checkWidget (); |
| if (tabList != null) { |
| for (int i=0; i<tabList.length; i++) { |
| Control control = tabList [i]; |
| if (control == null) error (SWT.ERROR_INVALID_ARGUMENT); |
| if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); |
| if (control.parent != this) error (SWT.ERROR_INVALID_PARENT); |
| } |
| Control [] newList = new Control [tabList.length]; |
| System.arraycopy (tabList, 0, newList, 0, tabList.length); |
| tabList = newList; |
| } |
| this.tabList = tabList; |
| } |
| |
| boolean setTabGroupFocus () { |
| if (isTabItem ()) return setTabItemFocus (); |
| boolean takeFocus = (style & SWT.NO_FOCUS) == 0; |
| if ((state & CANVAS) != 0) { |
| takeFocus = hooksKeys (); |
| if ((style & SWT.EMBEDDED) != 0) takeFocus = true; |
| } |
| if (takeFocus && setTabItemFocus ()) return true; |
| Control [] children = _getChildren (); |
| for (int i=0; i<children.length; i++) { |
| Control child = children [i]; |
| if (child.isTabItem () && child.setTabItemFocus ()) return true; |
| } |
| return false; |
| } |
| |
| boolean translateMnemonic (Event event, Control control) { |
| if (super.translateMnemonic (event, control)) return true; |
| if (control != null) { |
| Control [] children = _getChildren (); |
| for (int i=0; i<children.length; i++) { |
| Control child = children [i]; |
| if (child.translateMnemonic (event, control)) return true; |
| } |
| } |
| return false; |
| } |
| |
| int traversalCode(int key, int event) { |
| if ((state & CANVAS) != 0) { |
| if ((style & SWT.NO_FOCUS) != 0) return 0; |
| if (hooksKeys ()) return 0; |
| } |
| return super.traversalCode (key, event); |
| } |
| |
| boolean translateTraversal (int msg) { |
| if ((state & CANVAS) != 0 && (style & SWT.EMBEDDED) != 0) return false; |
| return super.translateTraversal (msg); |
| } |
| |
| void updateBackgroundColor () { |
| super.updateBackgroundColor (); |
| Control [] children = _getChildren (); |
| for (int i=0; i<children.length; i++) { |
| if ((children [i].state & PARENT_BACKGROUND) != 0) { |
| children [i].updateBackgroundColor (); |
| } |
| } |
| } |
| |
| void updateBackgroundImage () { |
| super.updateBackgroundImage (); |
| Control [] children = _getChildren (); |
| for (int i=0; i<children.length; i++) { |
| if ((children [i].state & PARENT_BACKGROUND) != 0) { |
| children [i].updateBackgroundImage (); |
| } |
| } |
| } |
| |
| void updateBackgroundMode () { |
| super.updateBackgroundMode (); |
| Control [] children = _getChildren (); |
| for (int i = 0; i < children.length; i++) { |
| children [i].updateBackgroundMode (); |
| } |
| } |
| |
| void updateFont (Font oldFont, Font newFont) { |
| super.updateFont (oldFont, newFont); |
| Control [] children = _getChildren (); |
| for (int i=0; i<children.length; i++) { |
| Control control = children [i]; |
| if (!control.isDisposed ()) { |
| control.updateFont (oldFont, newFont); |
| } |
| } |
| } |
| |
| void updateLayout (boolean resize, boolean all) { |
| Composite parent = findDeferredControl (); |
| if (parent != null) { |
| parent.state |= LAYOUT_CHILD; |
| return; |
| } |
| if ((state & LAYOUT_NEEDED) != 0) { |
| boolean changed = (state & LAYOUT_CHANGED) != 0; |
| state &= ~(LAYOUT_NEEDED | LAYOUT_CHANGED); |
| layout.layout (this, changed); |
| } |
| if (all) { |
| state &= ~LAYOUT_CHILD; |
| Control [] children = _getChildren (); |
| for (int i=0; i<children.length; i++) { |
| children [i].updateLayout (resize, all); |
| } |
| } |
| } |
| |
| } |