| /******************************************************************************* |
| * Copyright (c) 2000, 2009 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.graphics.*; |
| import org.eclipse.swt.internal.wpf.*; |
| import org.eclipse.swt.*; |
| |
| /** |
| * Instances of this class represent a selectable user interface object |
| * that represents a expandable item in a expand bar. |
| * <p> |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>(none)</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>(none)</dd> |
| * </dl> |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see ExpandBar |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| * |
| * @since 3.2 |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class ExpandItem extends Item { |
| ExpandBar parent; |
| Control control; |
| int imageHandle, textHandle, contentHandle; |
| |
| /** |
| * 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 ExpandItem (ExpandBar parent, int style) { |
| this (parent, style, checkNull (parent).getItemCount ()); |
| } |
| |
| /** |
| * Constructs a new instance of this class given its parent, a |
| * style value describing its behavior and appearance, and the index |
| * at which to place it in the items maintained by its parent. |
| * <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 |
| * @param index the zero-relative index to store the receiver in its parent |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)</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 ExpandItem (ExpandBar parent, int style, int index) { |
| super (parent, style); |
| this.parent = parent; |
| parent.createItem (this, style, index); |
| } |
| |
| static ExpandBar checkNull (ExpandBar control) { |
| if (control == null) SWT.error (SWT.ERROR_NULL_ARGUMENT); |
| return control; |
| } |
| |
| void createHandle () { |
| handle = OS.gcnew_Expander (); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| int spacing = parent.spacing; |
| int thickness = OS.gcnew_Thickness (spacing, spacing, spacing, spacing); |
| OS.FrameworkElement_Margin (handle, thickness); |
| OS.GCHandle_Free (thickness); |
| imageHandle = OS.gcnew_Image (); |
| if (imageHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.Image_Stretch (imageHandle, OS.Stretch_None); |
| OS.UIElement_Visibility (imageHandle, OS.Visibility_Collapsed); |
| textHandle = OS.gcnew_TextBlock (); |
| if (textHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| int panel = OS.gcnew_StackPanel (); |
| if (panel == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.StackPanel_Orientation (panel, OS.Orientation_Horizontal); |
| thickness = OS.gcnew_Thickness (1, 1, 1, 1); |
| if (thickness == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.FrameworkElement_Margin (panel, thickness); |
| OS.GCHandle_Free (thickness); |
| int children = OS.Panel_Children (panel); |
| OS.UIElementCollection_Add (children, imageHandle); |
| OS.UIElementCollection_Add (children, textHandle); |
| OS.GCHandle_Free (children); |
| OS.HeaderedContentControl_Header (handle, panel); |
| OS.GCHandle_Free (panel); |
| contentHandle = OS.gcnew_Canvas (); |
| if (contentHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.ContentControl_Content (handle, contentHandle); |
| } |
| |
| void deregister () { |
| display.removeWidget (handle); |
| } |
| |
| void destroyWidget () { |
| parent.destroyItem (this); |
| releaseHandle (); |
| } |
| |
| /** |
| * Returns the control that is shown when the item is expanded. |
| * If no control has been set, return <code>null</code>. |
| * |
| * @return the control |
| * |
| * @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 getControl () { |
| checkWidget (); |
| return control; |
| } |
| |
| /** |
| * Returns <code>true</code> if the receiver is expanded, |
| * and false otherwise. |
| * |
| * @return the expanded 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> |
| */ |
| public boolean getExpanded () { |
| checkWidget (); |
| return OS.Expander_IsExpanded (handle); |
| } |
| |
| /** |
| * Returns the height of the receiver's header |
| * |
| * @return the height of the header |
| * |
| * @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 getHeaderHeight () { |
| checkWidget (); |
| int panel = OS.HeaderedContentControl_Header (handle); |
| return (int) OS.FrameworkElement_ActualHeight (panel); |
| } |
| |
| /** |
| * Gets the height of the receiver. |
| * |
| * @return the height |
| * |
| * @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 getHeight () { |
| checkWidget (); |
| return (int) OS.FrameworkElement_Height (contentHandle); |
| } |
| |
| /** |
| * Returns the receiver's parent, which must be a <code>ExpandBar</code>. |
| * |
| * @return the receiver's parent |
| * |
| * @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 ExpandBar getParent () { |
| checkWidget (); |
| return parent; |
| } |
| |
| Control getWidgetControl () { |
| return parent; |
| } |
| |
| void HandleExpanded (int sender, int e) { |
| if (!checkEvent (e)) return; |
| Event event = new Event (); |
| event.item = this; |
| parent.notifyListeners (SWT.Expand, event); |
| } |
| |
| void HandleCollapsed (int sender, int e) { |
| if (!checkEvent (e)) return; |
| Event event = new Event (); |
| event.item = this; |
| parent.notifyListeners (SWT.Collapse, event); |
| } |
| |
| void HandleSizeChanged (int sender, int e) { |
| if (!checkEvent (e)) return; |
| resizeControl (); |
| } |
| |
| void hookEvents () { |
| super.hookEvents (); |
| int handler = OS.gcnew_RoutedEventHandler (jniRef, "HandleExpanded"); |
| if (handler == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.Expander_Expanded (handle, handler); |
| OS.GCHandle_Free (handler); |
| handler = OS.gcnew_RoutedEventHandler (jniRef, "HandleCollapsed"); |
| if (handler == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.Expander_Collapsed (handle, handler); |
| OS.GCHandle_Free (handler); |
| handler = OS.gcnew_SizeChangedEventHandler (jniRef, "HandleSizeChanged"); |
| if (handler == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.FrameworkElement_SizeChanged (contentHandle, handler); |
| OS.GCHandle_Free (handler); |
| } |
| |
| void register () { |
| display.addWidget (handle, this); |
| } |
| |
| void releaseHandle () { |
| super.releaseHandle (); |
| if (handle != 0) OS.GCHandle_Free (handle); |
| handle = 0; |
| parent = null; |
| if (textHandle != 0) OS.GCHandle_Free (textHandle); |
| textHandle = 0; |
| if (imageHandle !=0 )OS.GCHandle_Free (imageHandle); |
| imageHandle = 0; |
| if (contentHandle != 0) OS.GCHandle_Free (contentHandle); |
| contentHandle = 0; |
| } |
| |
| void resizeControl () { |
| if (control != null) { |
| int width = (int) OS.FrameworkElement_ActualWidth (contentHandle); |
| int height = (int) OS.FrameworkElement_Height (contentHandle); |
| control.setSize (width, height); |
| } |
| } |
| |
| /** |
| * Sets the control that is shown when the item is expanded. |
| * |
| * @param control the new control (or null) |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the control has been disposed</li> |
| * <li>ERROR_INVALID_PARENT - if the control 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 setControl (Control control) { |
| checkWidget (); |
| if (control != null) { |
| if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); |
| if (control.parent != parent) error (SWT.ERROR_INVALID_PARENT); |
| } |
| Control oldControl = this.control, newControl = control; |
| this.control = control; |
| int children = OS.Panel_Children (contentHandle); |
| int parentHandle = parent.parentingHandle (); |
| int parentChildren = OS.Panel_Children (parentHandle); |
| if (newControl != null) { |
| int topHandle = newControl.topHandle (); |
| OS.UIElementCollection_Remove (parentChildren, topHandle); |
| OS.UIElementCollection_Add (children, topHandle); |
| } |
| if (oldControl != null) { |
| int topHandle = oldControl.topHandle (); |
| OS.UIElementCollection_Remove (children, topHandle); |
| OS.UIElementCollection_Add (parentChildren, topHandle); |
| } |
| OS.GCHandle_Free (children); |
| OS.GCHandle_Free (parentChildren); |
| } |
| |
| /** |
| * Sets the expanded state of the receiver. |
| * |
| * @param expanded the new expanded 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> |
| */ |
| public void setExpanded (boolean expanded) { |
| checkWidget (); |
| OS.Expander_IsExpanded(handle, expanded); |
| } |
| |
| /** |
| * Sets the height of the receiver. This is height of the item when it is expanded, |
| * excluding the height of the header. |
| * |
| * @param height the new height |
| * |
| * @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 setHeight (int height) { |
| checkWidget (); |
| if (height < 0) return; |
| OS.FrameworkElement_Height (contentHandle, height); |
| } |
| |
| public void setImage (Image image) { |
| super.setImage (image); |
| if (image != null && image.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT); |
| this.image = image; |
| OS.Image_Source (imageHandle, image != null ? image.handle : 0); |
| OS.UIElement_Visibility (imageHandle, image != null ? OS.Visibility_Visible : OS.Visibility_Collapsed); |
| OS.UIElement_Visibility (textHandle, image != null && text.length () == 0 ? OS.Visibility_Collapsed : OS.Visibility_Visible); |
| int spacing = image != null && text.length () != 0 ? 3 : 0; |
| int margin = OS.gcnew_Thickness (0, 0, spacing, 0); |
| if (margin == 0) error(SWT.ERROR_NO_HANDLES); |
| OS.FrameworkElement_Margin (imageHandle, margin); |
| OS.GCHandle_Free (margin); |
| } |
| |
| public void setText (String string) { |
| checkWidget (); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (string.equals (text)) return; |
| text = string; |
| int ptr = createDotNetString (text, false); |
| if (ptr == 0) error(SWT.ERROR_NO_HANDLES); |
| OS.TextBlock_Text (textHandle, ptr); |
| OS.GCHandle_Free (ptr); |
| OS.UIElement_Visibility (textHandle, text.length() == 0 && image != null ? OS.Visibility_Collapsed : OS.Visibility_Visible); |
| int spacing = image != null && text.length () != 0 ? 3 : 0; |
| int margin = OS.gcnew_Thickness (0, 0, spacing, 0); |
| if (margin == 0) error(SWT.ERROR_NO_HANDLES); |
| OS.FrameworkElement_Margin (imageHandle, margin); |
| OS.GCHandle_Free (margin); |
| } |
| } |