| /******************************************************************************* |
| * 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.internal.wpf.*; |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.events.*; |
| |
| /** |
| * Instances of this class represent a selectable user interface object that |
| * issues notification when pressed and released. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>ARROW, CHECK, PUSH, RADIO, TOGGLE, FLAT</dd> |
| * <dd>UP, DOWN, LEFT, RIGHT, CENTER</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Selection</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of the styles ARROW, CHECK, PUSH, RADIO, and TOGGLE |
| * may be specified. |
| * </p><p> |
| * Note: Only one of the styles LEFT, RIGHT, and CENTER may be specified. |
| * </p><p> |
| * Note: Only one of the styles UP, DOWN, LEFT, and RIGHT may be specified |
| * when the ARROW style is specified. |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/snippets/#button">Button 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 Button extends Control { |
| String text = ""; |
| Image image; |
| int textHandle, imageHandle; |
| boolean ignoreSelection, grayed; |
| |
| /** |
| * 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#ARROW |
| * @see SWT#CHECK |
| * @see SWT#PUSH |
| * @see SWT#RADIO |
| * @see SWT#TOGGLE |
| * @see SWT#FLAT |
| * @see SWT#UP |
| * @see SWT#DOWN |
| * @see SWT#LEFT |
| * @see SWT#RIGHT |
| * @see SWT#CENTER |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Button (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when the control is selected by the user, by sending |
| * it one of the messages defined in the <code>SelectionListener</code> |
| * interface. |
| * <p> |
| * <code>widgetSelected</code> is called when the control is selected by the user. |
| * <code>widgetDefaultSelected</code> is not called. |
| * </p> |
| * <p> |
| * When the <code>SWT.RADIO</code> style bit is set, the <code>widgetSelected</code> method is |
| * also called when the receiver loses selection because another item in the same radio group |
| * was selected by the user. During <code>widgetSelected</code> the application can use |
| * <code>getSelection()</code> to determine the current selected state of the receiver. |
| * </p> |
| * |
| * @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 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) { |
| style = checkBits (style, SWT.PUSH, SWT.ARROW, SWT.CHECK, SWT.RADIO, SWT.TOGGLE, 0); |
| if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0) { |
| return checkBits (style, SWT.CENTER, SWT.LEFT, SWT.RIGHT, 0, 0, 0); |
| } |
| if ((style & (SWT.CHECK | SWT.RADIO)) != 0) { |
| return checkBits (style, SWT.LEFT, SWT.RIGHT, SWT.CENTER, 0, 0, 0); |
| } |
| if ((style & SWT.ARROW) != 0) { |
| style |= SWT.NO_FOCUS; |
| return checkBits (style, SWT.UP, SWT.DOWN, SWT.LEFT, SWT.RIGHT, 0, 0); |
| } |
| return style; |
| } |
| |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget (); |
| Point size = computeSize (handle, wHint, hHint, changed); |
| if ((style & SWT.ARROW) == 0) { |
| int border = getBorderWidth (); |
| size.x += border * 2; |
| size.y += border * 2; |
| } |
| return size; |
| } |
| |
| void createArrow () { |
| int geometry = OS.gcnew_StreamGeometry (); |
| int context = OS.StreamGeometry_Open (geometry); |
| int start = 0, point = 0, end = 0; |
| int mask = SWT.RIGHT | SWT.LEFT | SWT.DOWN | SWT.UP; |
| switch (style & mask) { |
| case SWT.RIGHT: |
| start = OS.gcnew_Point (1, 0); |
| point = OS.gcnew_Point (4, 3); |
| end = OS.gcnew_Point (1, 6); |
| break; |
| case SWT.LEFT: |
| start = OS.gcnew_Point (4, 1); |
| point = OS.gcnew_Point (1, 3); |
| end = OS.gcnew_Point (4, 6); |
| break; |
| case SWT.DOWN: |
| start = OS.gcnew_Point (0, 1); |
| point = OS.gcnew_Point (3, 4); |
| end = OS.gcnew_Point (6, 1); |
| break; |
| case SWT.UP: |
| start = OS.gcnew_Point (0, 4); |
| point = OS.gcnew_Point (3, 1); |
| end = OS.gcnew_Point (6, 4); |
| break; |
| } |
| OS.StreamGeometryContext_BeginFigure (context, start, true, true); |
| OS.StreamGeometryContext_LineTo (context, point, true, true); |
| OS.StreamGeometryContext_LineTo (context, end, true, true); |
| OS.StreamGeometryContext_Close (context); |
| int path = OS.gcnew_Path (); |
| OS.Path_Data (path, geometry); |
| int padding = OS.gcnew_Thickness (3, 3, 3, 3); |
| OS.FrameworkElement_Margin (path, padding); |
| int brush = OS.Brushes_Black (); |
| OS.Path_Fill (path, brush); |
| OS.FrameworkElement_Width (path, 6); |
| OS.FrameworkElement_Height (path, 6); |
| OS.FrameworkElement_HorizontalAlignment (path, OS.HorizontalAlignment_Center); |
| OS.FrameworkElement_VerticalAlignment (path, OS.VerticalAlignment_Center); |
| OS.ContentControl_Content (handle, path); |
| OS.GCHandle_Free (padding); |
| OS.GCHandle_Free (start); |
| OS.GCHandle_Free (point); |
| OS.GCHandle_Free (end); |
| OS.GCHandle_Free (brush); |
| OS.GCHandle_Free (path); |
| OS.GCHandle_Free (context); |
| OS.GCHandle_Free (geometry); |
| } |
| |
| void createHandle () { |
| if ((style & SWT.PUSH) == 0) state |= THEME_BACKGROUND; |
| int bits = SWT.TOGGLE | SWT.ARROW | SWT.PUSH | SWT.RADIO | SWT.CHECK; |
| switch (style & bits) { |
| case SWT.TOGGLE: |
| handle = OS.gcnew_ToggleButton (); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| break; |
| case SWT.ARROW: |
| handle = OS.gcnew_Button (); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| createArrow (); |
| break; |
| case SWT.RADIO: |
| handle = OS.gcnew_RadioButton (); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| break; |
| case SWT.CHECK: |
| handle = OS.gcnew_CheckBox (); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| break; |
| case SWT.PUSH: |
| default: |
| handle = OS.gcnew_Button (); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| break; |
| } |
| if ((style & SWT.ARROW) != 0) return; |
| int value = OS.HorizontalAlignment_Left; |
| if ((style & SWT.CENTER) != 0) value = OS.HorizontalAlignment_Center; |
| if ((style & SWT.RIGHT) != 0) value = OS.HorizontalAlignment_Right; |
| OS.Control_HorizontalContentAlignment (handle, value); |
| 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_AccessText (); |
| if (textHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.FrameworkElement_VerticalAlignment (textHandle, OS.VerticalAlignment_Center); |
| int panel = OS.gcnew_StackPanel (); |
| if (panel == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.StackPanel_Orientation (panel, OS.Orientation_Horizontal); |
| int 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.ContentControl_Content (handle, panel); |
| OS.GCHandle_Free (children); |
| OS.GCHandle_Free (panel); |
| } |
| |
| int defaultBackground () { |
| if ((style & SWT.PUSH) == 0) return OS.SystemColors_ControlColor; |
| return 0; |
| } |
| |
| /** |
| * Returns a value which describes the position of the |
| * text or image in the receiver. The value will be one of |
| * <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code> |
| * unless the receiver is an <code>ARROW</code> button, in |
| * which case, the alignment will indicate the direction of |
| * the arrow (one of <code>LEFT</code>, <code>RIGHT</code>, |
| * <code>UP</code> or <code>DOWN</code>). |
| * |
| * @return the alignment |
| * |
| * @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 getAlignment () { |
| checkWidget (); |
| if ((style & SWT.ARROW) != 0) { |
| if ((style & SWT.UP) != 0) return SWT.UP; |
| if ((style & SWT.DOWN) != 0) return SWT.DOWN; |
| if ((style & SWT.LEFT) != 0) return SWT.LEFT; |
| if ((style & SWT.RIGHT) != 0) return SWT.RIGHT; |
| return SWT.UP; |
| } |
| if ((style & SWT.LEFT) != 0) return SWT.LEFT; |
| if ((style & SWT.CENTER) != 0) return SWT.CENTER; |
| if ((style & SWT.RIGHT) != 0) return SWT.RIGHT; |
| return SWT.LEFT; |
| } |
| |
| /** |
| * Returns <code>true</code> if the receiver is grayed, |
| * and false otherwise. When the widget does not have |
| * the <code>CHECK</code> style, return false. |
| * |
| * @return the grayed state of the checkbox |
| * |
| * @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 3.4 |
| */ |
| public boolean getGrayed () { |
| checkWidget (); |
| if ((style & SWT.CHECK) == 0) return false; |
| return grayed; |
| } |
| |
| /** |
| * Returns the receiver's image if it has one, or null |
| * if it does not. |
| * |
| * @return the receiver's image |
| * |
| * @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 Image getImage () { |
| checkWidget (); |
| return image; |
| } |
| |
| String getNameText () { |
| return getText (); |
| } |
| |
| /** |
| * Returns <code>true</code> if the receiver is selected, |
| * and false otherwise. |
| * <p> |
| * When the receiver is of type <code>CHECK</code> or <code>RADIO</code>, |
| * it is selected when it is checked. When it is of type <code>TOGGLE</code>, |
| * it is selected when it is pushed in. If the receiver is of any other type, |
| * this method returns false. |
| * |
| * @return the selection 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 getSelection () { |
| checkWidget (); |
| if ((style & (SWT.CHECK | SWT.RADIO | SWT.TOGGLE)) == 0) return false; |
| if ((style & SWT.CHECK) != 0 && grayed) { |
| int property = OS.ToggleButton_IsCheckedProperty(); |
| int value = OS.DependencyObject_GetValue(handle, property); |
| OS.GCHandle_Free(property); |
| if (value == 0) return true; |
| OS.GCHandle_Free(value); |
| } |
| return OS.ToggleButton_IsChecked (handle); |
| } |
| |
| /** |
| * Returns the receiver's text, which will be an empty |
| * string if it has never been set or if the receiver is |
| * an <code>ARROW</code> button. |
| * |
| * @return the receiver's text |
| * |
| * @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 getText () { |
| checkWidget (); |
| if ((style & SWT.ARROW) != 0) return ""; |
| return text; |
| } |
| |
| void HandleClick (int sender, int e) { |
| if (!checkEvent (e)) return; |
| if ((style & SWT.CHECK) != 0) { |
| if (grayed) { |
| if (OS.ToggleButton_IsChecked (handle)) { |
| ignoreSelection = true; |
| OS.ToggleButton_IsCheckedNullSetter (handle); |
| ignoreSelection = false; |
| } |
| } |
| } |
| if (!ignoreSelection) postEvent (SWT.Selection); |
| } |
| |
| void hookEvents () { |
| super.hookEvents (); |
| if ((style & (SWT.TOGGLE | SWT.RADIO | SWT.CHECK)) != 0) { |
| int handler = OS.gcnew_RoutedEventHandler (jniRef, "HandleClick"); |
| if (handler == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.ToggleButton_Checked (handle, handler); |
| OS.GCHandle_Free (handler); |
| handler = OS.gcnew_RoutedEventHandler (jniRef, "HandleClick"); |
| if (handler == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.ToggleButton_Unchecked (handle, handler); |
| OS.GCHandle_Free (handler); |
| } else { |
| int handler = OS.gcnew_RoutedEventHandler (jniRef, "HandleClick"); |
| if (handler == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.ButtonBase_Click (handle, handler); |
| OS.GCHandle_Free (handler); |
| } |
| } |
| |
| boolean mnemonicHit (char ch) { |
| //TODO |
| return false; |
| } |
| |
| boolean mnemonicMatch (char key) { |
| return super.mnemonicMatch (textHandle, key); |
| } |
| |
| void releaseHandle() { |
| super.releaseHandle (); |
| if (textHandle != 0) OS.GCHandle_Free (textHandle); |
| textHandle = 0; |
| if (imageHandle !=0 )OS.GCHandle_Free (imageHandle); |
| imageHandle = 0; |
| } |
| |
| void releaseWidget () { |
| super.releaseWidget (); |
| text = null; |
| image = null; |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the control is selected by the user. |
| * |
| * @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); |
| } |
| |
| /** |
| * Controls how text, images and arrows will be displayed |
| * in the receiver. The argument should be one of |
| * <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code> |
| * unless the receiver is an <code>ARROW</code> button, in |
| * which case, the argument indicates the direction of |
| * the arrow (one of <code>LEFT</code>, <code>RIGHT</code>, |
| * <code>UP</code> or <code>DOWN</code>). |
| * |
| * @param alignment the new alignment |
| * |
| * @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 setAlignment (int alignment) { |
| checkWidget (); |
| if ((style & SWT.ARROW) != 0) { |
| if ((style & (SWT.UP | SWT.DOWN | SWT.LEFT | SWT.RIGHT)) == 0) return; |
| style &= ~(SWT.UP | SWT.DOWN | SWT.LEFT | SWT.RIGHT); |
| style |= alignment & (SWT.UP | SWT.DOWN | SWT.LEFT | SWT.RIGHT); |
| createArrow (); |
| return; |
| } |
| if ((alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER)) == 0) return; |
| style &= ~(SWT.LEFT | SWT.RIGHT | SWT.CENTER); |
| style |= alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER); |
| int value = OS.HorizontalAlignment_Left; |
| if ((style & SWT.CENTER) != 0) value = OS.HorizontalAlignment_Center; |
| if ((style & SWT.RIGHT) != 0) value = OS.HorizontalAlignment_Right; |
| OS.Control_HorizontalContentAlignment (handle, value); |
| } |
| |
| /** |
| * Sets the grayed state of the receiver. This state change |
| * only applies if the control was created with the SWT.CHECK |
| * style. |
| * |
| * @param grayed the new grayed 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> |
| * |
| * @since 3.4 |
| */ |
| public void setGrayed (boolean grayed) { |
| checkWidget (); |
| if ((style & SWT.CHECK) == 0) return; |
| boolean checked = getSelection(); |
| this.grayed = grayed; |
| ignoreSelection = true; |
| if (checked){ |
| if (grayed) { |
| OS.ToggleButton_IsCheckedNullSetter(handle); |
| } else { |
| OS.ToggleButton_IsChecked(handle, true); |
| } |
| } |
| setSelection (checked); |
| ignoreSelection = false; |
| } |
| |
| void setDefault (boolean value) { |
| if ((style & SWT.PUSH) == 0) return; |
| OS.Button_IsDefault (handle, value); |
| } |
| |
| /** |
| * Sets the receiver's image to the argument, which may be |
| * <code>null</code> indicating that no image should be displayed. |
| * <p> |
| * Note that a Button can display an image and text simultaneously |
| * on Windows (starting with XP), GTK+ and OSX. On other platforms, |
| * a Button that has an image and text set into it will display the |
| * image or text that was set most recently. |
| * </p> |
| * @param image the image to display on the receiver (may be <code>null</code>) |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the image 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 void setImage (Image image) { |
| checkWidget (); |
| if (image != null && image.isDisposed()) error (SWT.ERROR_INVALID_ARGUMENT); |
| if ((style & SWT.ARROW) != 0) return; |
| 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); |
| } |
| |
| /** |
| * Sets the selection state of the receiver, if it is of type <code>CHECK</code>, |
| * <code>RADIO</code>, or <code>TOGGLE</code>. |
| * |
| * <p> |
| * When the receiver is of type <code>CHECK</code> or <code>RADIO</code>, |
| * it is selected when it is checked. When it is of type <code>TOGGLE</code>, |
| * it is selected when it is pushed in. |
| * |
| * @param selected the new selection 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 setSelection (boolean selected) { |
| checkWidget (); |
| if ((style & (SWT.CHECK | SWT.RADIO | SWT.TOGGLE)) == 0) return; |
| ignoreSelection = true; |
| if ((style & SWT.CHECK) != 0 && grayed) { |
| OS.ToggleButton_IsCheckedNullSetter (handle); |
| } else { |
| OS.ToggleButton_IsChecked (handle, selected); |
| } |
| ignoreSelection = false; |
| } |
| |
| /** |
| * Sets the receiver's text. |
| * <p> |
| * This method sets the button label. The label may include |
| * the mnemonic character but must not contain line delimiters. |
| * </p> |
| * <p> |
| * Mnemonics are indicated by an '&' that causes the next |
| * character to be the mnemonic. When the user presses a |
| * key sequence that matches the mnemonic, a selection |
| * event occurs. On most platforms, the mnemonic appears |
| * underlined but may be emphasized in a platform specific |
| * manner. The mnemonic indicator character '&' can be |
| * escaped by doubling it in the string, causing a single |
| * '&' to be displayed. |
| * </p><p> |
| * Note that a Button can display an image and text simultaneously |
| * on Windows (starting with XP), GTK+ and OSX. On other platforms, |
| * a Button that has an image and text set into it will display the |
| * image or text that was set most recently. |
| * </p> |
| * @param string the new text |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the text 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 setText (String string) { |
| checkWidget (); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if ((style & SWT.ARROW) != 0) return; |
| if (string.equals (text)) return; |
| text = string; |
| int strPtr = createDotNetString (text, true); |
| if (strPtr == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.AccessText_Text (textHandle, strPtr); |
| OS.GCHandle_Free (strPtr); |
| OS.UIElement_Visibility (textHandle, string.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); |
| } |
| |
| int traversalCode (int key, int event) { |
| int code = super.traversalCode (key, event); |
| if ((style & SWT.ARROW) != 0) code &= ~(SWT.TRAVERSE_TAB_NEXT | SWT.TRAVERSE_TAB_PREVIOUS); |
| if ((style & SWT.RADIO) != 0) code |= SWT.TRAVERSE_ARROW_NEXT | SWT.TRAVERSE_ARROW_PREVIOUS; |
| return code; |
| } |
| |
| } |