| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.internal.win32.*; |
| 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 intended to be subclassed <em>only</em> |
| * within the SWT implementation. |
| * </p> |
| */ |
| |
| public class Button extends Control { |
| Image image; |
| static final int ButtonProc; |
| static final TCHAR ButtonClass = new TCHAR (0,"BUTTON", true); |
| static final int CheckWidth, CheckHeight; |
| static { |
| int hBitmap = OS.LoadBitmap (0, OS.OBM_CHECKBOXES); |
| if (hBitmap == 0) { |
| CheckWidth = OS.GetSystemMetrics (OS.IsWinCE ? OS.SM_CXSMICON : OS.SM_CXVSCROLL); |
| CheckHeight = OS.GetSystemMetrics (OS.IsWinCE ? OS.SM_CYSMICON : OS.SM_CYVSCROLL); |
| } else { |
| BITMAP bitmap = new BITMAP (); |
| OS.GetObject (hBitmap, BITMAP.sizeof, bitmap); |
| OS.DeleteObject (hBitmap); |
| CheckWidth = bitmap.bmWidth / 4; |
| CheckHeight = bitmap.bmHeight / 3; |
| } |
| WNDCLASS lpWndClass = new WNDCLASS (); |
| OS.GetClassInfo (0, ButtonClass, lpWndClass); |
| ButtonProc = lpWndClass.lpfnWndProc; |
| } |
| |
| /** |
| * 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#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 sending |
| * it one of the messages defined in the <code>SelectionListener</code> |
| * interface. |
| * <p> |
| * <code>widgetSelected</code> is called when the control is selected. |
| * <code>widgetDefaultSelected</code> is not called. |
| * </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); |
| } |
| |
| int callWindowProc (int msg, int wParam, int lParam) { |
| if (handle == 0) return 0; |
| return OS.CallWindowProc (ButtonProc, handle, msg, wParam, lParam); |
| } |
| |
| static int checkStyle (int style) { |
| style = checkBits (style, SWT.PUSH, SWT.ARROW, SWT.CHECK, SWT.RADIO, SWT.TOGGLE, 0); |
| if ((style & SWT.PUSH) != 0) { |
| return checkBits (style, SWT.CENTER, SWT.LEFT, SWT.RIGHT, 0, 0, 0); |
| } |
| if ((style & (SWT.CHECK | SWT.RADIO | SWT.TOGGLE)) != 0) { |
| return checkBits (style, SWT.LEFT, SWT.RIGHT, SWT.CENTER, 0, 0, 0); |
| } |
| if ((style & SWT.ARROW) != 0) { |
| return checkBits (style, SWT.UP, SWT.DOWN, SWT.LEFT, SWT.RIGHT, 0, 0); |
| } |
| return style; |
| } |
| |
| void click () { |
| /* |
| * Note: BM_CLICK sends WM_LBUTTONDOWN and WM_LBUTTONUP. |
| */ |
| OS.SendMessage (handle, OS.BM_CLICK, 0, 0); |
| } |
| |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget (); |
| int border = getBorderWidth (); |
| int width = border * 2, height = border * 2; |
| if ((style & SWT.ARROW) != 0) { |
| if ((style & (SWT.UP | SWT.DOWN)) != 0) { |
| width += OS.GetSystemMetrics (OS.SM_CXVSCROLL); |
| height += OS.GetSystemMetrics (OS.SM_CYVSCROLL); |
| } else { |
| width += OS.GetSystemMetrics (OS.SM_CXHSCROLL); |
| height += OS.GetSystemMetrics (OS.SM_CYHSCROLL); |
| } |
| if (wHint != SWT.DEFAULT) width = wHint + (border * 2); |
| if (hHint != SWT.DEFAULT) height = hHint + (border * 2); |
| return new Point (width, height); |
| } |
| int extra = 0; |
| int bits = OS.GetWindowLong (handle, OS.GWL_STYLE); |
| if ((bits & (OS.BS_BITMAP | OS.BS_ICON)) == 0) { |
| int oldFont = 0; |
| int hDC = OS.GetDC (handle); |
| int newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0); |
| if (newFont != 0) oldFont = OS.SelectObject (hDC, newFont); |
| TEXTMETRIC lptm = new TEXTMETRIC (); |
| OS.GetTextMetrics (hDC, lptm); |
| int length = OS.GetWindowTextLength (handle); |
| if (length == 0) { |
| height += lptm.tmHeight; |
| } else { |
| extra = Math.max (8, lptm.tmAveCharWidth); |
| TCHAR buffer = new TCHAR (getCodePage (), length + 1); |
| OS.GetWindowText (handle, buffer, length + 1); |
| RECT rect = new RECT (); |
| int flags = OS.DT_CALCRECT | OS.DT_SINGLELINE; |
| OS.DrawText (hDC, buffer, length, rect, flags); |
| width += rect.right - rect.left; |
| height += rect.bottom - rect.top; |
| } |
| if (newFont != 0) OS.SelectObject (hDC, oldFont); |
| OS.ReleaseDC (handle, hDC); |
| } else { |
| if (image != null) { |
| Rectangle rect = image.getBounds (); |
| width = rect.width; |
| height = rect.height; |
| extra = 8; |
| } |
| } |
| if ((style & (SWT.CHECK | SWT.RADIO)) != 0) { |
| width += CheckWidth + extra; |
| height = Math.max (height, CheckHeight + 3); |
| } |
| if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0) { |
| width += 12; height += 10; |
| } |
| if (wHint != SWT.DEFAULT) width = wHint + (border * 2); |
| if (hHint != SWT.DEFAULT) height = hHint + (border * 2); |
| return new Point (width, height); |
| } |
| |
| int defaultBackground () { |
| if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0) { |
| return OS.GetSysColor (OS.COLOR_BTNFACE); |
| } |
| return super.defaultBackground (); |
| } |
| |
| int defaultForeground () { |
| return OS.GetSysColor (OS.COLOR_BTNTEXT); |
| } |
| |
| /** |
| * 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; |
| } |
| |
| boolean getDefault () { |
| if ((style & SWT.PUSH) == 0) return false; |
| int bits = OS.GetWindowLong (handle, OS.GWL_STYLE); |
| return (bits & OS.BS_DEFPUSHBUTTON) != 0; |
| } |
| |
| /** |
| * 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; |
| int state = OS.SendMessage (handle, OS.BM_GETCHECK, 0, 0); |
| return (state & OS.BST_CHECKED) != 0; |
| } |
| |
| /** |
| * Returns the receiver's text, which will be an empty |
| * string if it has never been set. |
| * |
| * @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 (); |
| int length = OS.GetWindowTextLength (handle); |
| if (length == 0) return ""; |
| TCHAR buffer = new TCHAR (getCodePage (), length + 1); |
| OS.GetWindowText (handle, buffer, length + 1); |
| return buffer.toString (0, length); |
| } |
| |
| boolean isTabItem () { |
| //TEMPORARY CODE |
| //if ((style & SWT.PUSH) != 0) return true; |
| return super.isTabItem (); |
| } |
| |
| boolean mnemonicHit (char ch) { |
| if (!setFocus ()) return false; |
| /* |
| * Feature in Windows. When a radio button gets focus, |
| * it selects the button in WM_SETFOCUS. Therefore, it |
| * is not necessary to click the button or send events |
| * because this has already happened in WM_SETFOCUS. |
| */ |
| if ((style & SWT.RADIO) == 0) click (); |
| return true; |
| } |
| |
| boolean mnemonicMatch (char key) { |
| char mnemonic = findMnemonic (getText ()); |
| if (mnemonic == '\0') return false; |
| return Character.toUpperCase (key) == Character.toUpperCase (mnemonic); |
| } |
| |
| void releaseWidget () { |
| super.releaseWidget (); |
| image = null; |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the control is selected. |
| * |
| * @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 #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); |
| } |
| |
| void selectRadio () { |
| /* |
| * This code is intentionally commented. When two groups |
| * of radio buttons with the same parent are separated by |
| * another control, the correct behavior should be that |
| * the two groups act independently. This is consistent |
| * with radio tool and menu items. The commented code |
| * implements this behavior. |
| */ |
| // int index = 0; |
| // Control [] children = parent._getChildren (); |
| // while (index < children.length && children [index] != this) index++; |
| // int i = index - 1; |
| // while (i >= 0 && children [i].setRadioSelection (false)) --i; |
| // int j = index + 1; |
| // while (j < children.length && children [j].setRadioSelection (false)) j++; |
| // setSelection (true); |
| Control [] children = parent._getChildren (); |
| for (int i=0; i<children.length; i++) { |
| Control child = children [i]; |
| if (this != child) child.setRadioSelection (false); |
| } |
| setSelection (true); |
| } |
| |
| /** |
| * 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); |
| OS.InvalidateRect (handle, null, true); |
| 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 bits = OS.GetWindowLong (handle, OS.GWL_STYLE); |
| bits &= ~(OS.BS_LEFT | OS.BS_CENTER | OS.BS_RIGHT); |
| if ((style & SWT.LEFT) != 0) bits |= OS.BS_LEFT; |
| if ((style & SWT.CENTER) != 0) bits |= OS.BS_CENTER; |
| if ((style & SWT.RIGHT) != 0) bits |= OS.BS_RIGHT; |
| OS.SetWindowLong (handle, OS.GWL_STYLE, bits); |
| OS.InvalidateRect (handle, null, true); |
| } |
| |
| void setDefault (boolean value) { |
| if ((style & SWT.PUSH) == 0) return; |
| int hwndShell = menuShell ().handle; |
| int bits = OS.GetWindowLong (handle, OS.GWL_STYLE); |
| if (value) { |
| bits |= OS.BS_DEFPUSHBUTTON; |
| OS.SendMessage (hwndShell, OS.DM_SETDEFID, handle, 0); |
| } else { |
| bits &= ~OS.BS_DEFPUSHBUTTON; |
| OS.SendMessage (hwndShell, OS.DM_SETDEFID, 0, 0); |
| } |
| OS.SendMessage (handle, OS.BM_SETSTYLE, bits, 1); |
| } |
| |
| public boolean setFocus () { |
| checkWidget(); |
| if ((style & SWT.ARROW) != 0) return false; |
| return super.setFocus (); |
| } |
| |
| /** |
| * Sets the receiver's image to the argument, which may be |
| * null indicating that no image should be displayed. |
| * |
| * @param image the image to display on the receiver (may be null) |
| * |
| * @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 (); |
| int hImage = 0, imageBits = 0, fImageType = 0; |
| if (image != null) { |
| if (image.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT); |
| hImage = image.handle; |
| switch (image.type) { |
| case SWT.BITMAP: |
| imageBits = OS.BS_BITMAP; |
| fImageType = OS.IMAGE_BITMAP; |
| break; |
| case SWT.ICON: |
| imageBits = OS.BS_ICON; |
| fImageType = OS.IMAGE_ICON; |
| break; |
| default: |
| return; |
| } |
| } |
| this.image = image; |
| int newBits = OS.GetWindowLong (handle, OS.GWL_STYLE); |
| int oldBits = newBits; |
| newBits &= ~(OS.BS_BITMAP | OS.BS_ICON); |
| newBits |= imageBits; |
| if (newBits != oldBits) { |
| OS.SetWindowLong (handle, OS.GWL_STYLE, newBits); |
| } |
| OS.SendMessage (handle, OS.BM_SETIMAGE, fImageType, hImage); |
| } |
| |
| boolean setRadioFocus () { |
| if ((style & SWT.RADIO) == 0 || !getSelection ()) return false; |
| return setFocus (); |
| } |
| |
| boolean setRadioSelection (boolean value) { |
| if ((style & SWT.RADIO) == 0) return false; |
| if (getSelection () != value) { |
| setSelection (value); |
| postEvent (SWT.Selection); |
| } |
| return true; |
| } |
| |
| boolean setSavedFocus () { |
| /* |
| * Feature in Windows. When a radio button gets focus, |
| * it selects the button in WM_SETFOCUS. If the previous |
| * saved focus widget was a radio button, allowing the shell |
| * to automatically restore the focus to the previous radio |
| * button will unexpectedly check that button. The fix is |
| * to disallow focus to be restored to radio button that is |
| * not selected. |
| */ |
| if ((style & SWT.RADIO) != 0 && !getSelection ()) return false; |
| return super.setSavedFocus (); |
| } |
| |
| /** |
| * 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; |
| int flags = selected ? OS.BST_CHECKED : OS.BST_UNCHECKED; |
| |
| /* |
| * Feature in Windows. When BM_SETCHECK is used |
| * to set the checked state of a radio or check |
| * button, it sets the WM_TABSTOP style. This |
| * is undocumented and unwanted. The fix is |
| * to save and restore the window style bits. |
| */ |
| int bits = OS.GetWindowLong (handle, OS.GWL_STYLE); |
| OS.SendMessage (handle, OS.BM_SETCHECK, flags, 0); |
| OS.SetWindowLong (handle, OS.GWL_STYLE, bits); |
| } |
| |
| /** |
| * 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 emphasised 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> |
| * |
| * @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); |
| int newBits = OS.GetWindowLong (handle, OS.GWL_STYLE); |
| int oldBits = newBits; |
| newBits &= ~(OS.BS_BITMAP | OS.BS_ICON); |
| if (newBits != oldBits) { |
| OS.SetWindowLong (handle, OS.GWL_STYLE, newBits); |
| } |
| TCHAR buffer = new TCHAR (getCodePage (), string, true); |
| OS.SetWindowText (handle, buffer); |
| } |
| |
| int widgetStyle () { |
| int bits = super.widgetStyle () | OS.BS_NOTIFY; |
| if ((style & SWT.FLAT) != 0) bits |= OS.BS_FLAT; |
| if ((style & SWT.ARROW) != 0) return bits | OS.BS_OWNERDRAW; |
| if ((style & SWT.LEFT) != 0) bits |= OS.BS_LEFT; |
| if ((style & SWT.CENTER) != 0) bits |= OS.BS_CENTER; |
| if ((style & SWT.RIGHT) != 0) bits |= OS.BS_RIGHT; |
| if ((style & SWT.PUSH) != 0) return bits | OS.BS_PUSHBUTTON | OS.WS_TABSTOP; |
| if ((style & SWT.CHECK) != 0) return bits | OS.BS_CHECKBOX | OS.WS_TABSTOP; |
| if ((style & SWT.RADIO) != 0) return bits | OS.BS_RADIOBUTTON; |
| if ((style & SWT.TOGGLE) != 0) return bits | OS.BS_PUSHLIKE | OS.BS_CHECKBOX; |
| return bits | OS.BS_PUSHBUTTON | OS.WS_TABSTOP; |
| } |
| |
| TCHAR windowClass () { |
| return ButtonClass; |
| } |
| |
| int windowProc () { |
| return ButtonProc; |
| } |
| |
| LRESULT WM_GETDLGCODE (int wParam, int lParam) { |
| LRESULT result = super.WM_GETDLGCODE (wParam, lParam); |
| if (result != null) return result; |
| if ((style & SWT.ARROW) != 0) { |
| return new LRESULT (OS.DLGC_STATIC); |
| } |
| return result; |
| } |
| |
| LRESULT WM_KILLFOCUS (int wParam, int lParam) { |
| LRESULT result = super.WM_KILLFOCUS (wParam, lParam); |
| if ((style & SWT.PUSH) != 0 && getDefault ()) { |
| menuShell ().setDefaultButton (null, false); |
| } |
| return result; |
| } |
| |
| LRESULT WM_SETFOCUS (int wParam, int lParam) { |
| /* |
| * Feature in Windows. When Windows sets focus to |
| * a radio button, it sets the WM_TABSTOP style. |
| * This is undocumented and unwanted. The fix is |
| * to save and restore the window style bits. |
| */ |
| int bits = 0; |
| if ((style & SWT.RADIO) != 0) { |
| bits = OS.GetWindowLong (handle, OS.GWL_STYLE); |
| } |
| LRESULT result = super.WM_SETFOCUS (wParam, lParam); |
| if ((style & SWT.RADIO) != 0) { |
| OS.SetWindowLong (handle, OS.GWL_STYLE, bits); |
| } |
| if ((style & SWT.PUSH) != 0) { |
| menuShell ().setDefaultButton (this, false); |
| } |
| return result; |
| } |
| |
| LRESULT wmCommandChild (int wParam, int lParam) { |
| int code = wParam >> 16; |
| switch (code) { |
| case OS.BN_CLICKED: |
| case OS.BN_DOUBLECLICKED: |
| if ((style & (SWT.CHECK | SWT.TOGGLE)) != 0) { |
| setSelection (!getSelection ()); |
| } else { |
| if ((style & SWT.RADIO) != 0) { |
| if ((parent.getStyle () & SWT.NO_RADIO_GROUP) != 0) { |
| setSelection (!getSelection ()); |
| } else { |
| selectRadio (); |
| } |
| } |
| } |
| postEvent (SWT.Selection); |
| } |
| return super.wmCommandChild (wParam, lParam); |
| } |
| |
| LRESULT wmDrawChild (int wParam, int lParam) { |
| if ((style & SWT.ARROW) == 0) return super.wmDrawChild (wParam, lParam); |
| DRAWITEMSTRUCT struct = new DRAWITEMSTRUCT (); |
| OS.MoveMemory (struct, lParam, DRAWITEMSTRUCT.sizeof); |
| int uState = OS.DFCS_SCROLLLEFT; |
| switch (style & (SWT.UP | SWT.DOWN | SWT.LEFT | SWT.RIGHT)) { |
| case SWT.UP: uState = OS.DFCS_SCROLLUP; break; |
| case SWT.DOWN: uState = OS.DFCS_SCROLLDOWN; break; |
| case SWT.LEFT: uState = OS.DFCS_SCROLLLEFT; break; |
| case SWT.RIGHT: uState = OS.DFCS_SCROLLRIGHT; break; |
| } |
| if (!getEnabled ()) uState |= OS.DFCS_INACTIVE; |
| if ((style & SWT.FLAT) == SWT.FLAT) uState |= OS.DFCS_FLAT; |
| if ((struct.itemState & OS.ODS_SELECTED) != 0) uState |= OS.DFCS_PUSHED; |
| RECT rect = new RECT (); |
| OS.SetRect (rect, struct.left, struct.top, struct.right, struct.bottom); |
| OS.DrawFrameControl (struct.hDC, rect, OS.DFC_SCROLL, uState); |
| return null; |
| } |
| |
| } |