| package org.eclipse.swt.widgets; |
| |
| /* |
| * (c) Copyright IBM Corp. 2000, 2001. |
| * All Rights Reserved |
| */ |
| |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.gtk.*; |
| 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>LEFT, RIGHT, CENTER</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Selection</dd> |
| * </dl> |
| * <p> |
| * IMPORTANT: This class is intended to be subclassed <em>only</em> |
| * within the SWT implementation. |
| * </p> |
| */ |
| public class Button extends Control { |
| int boxHandle; |
| Image image; |
| String text; |
| |
| /** |
| * 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 |
| * for all SWT widget classes should include a comment which |
| * describes the style constants which are applicable to the class. |
| * </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 |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Button (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| |
| 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; |
| } |
| |
| /** |
| * 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); |
| } |
| |
| void createHandle (int index) { |
| state |= HANDLE; |
| int bits = SWT.ARROW | SWT.TOGGLE | SWT.CHECK | SWT.RADIO | SWT.PUSH; |
| |
| boxHandle = OS.gtk_event_box_new (); |
| if (boxHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| switch (style & bits) { |
| case SWT.ARROW: |
| handle = OS.gtk_button_new (); |
| int arrow = OS.gtk_arrow_new (OS.GTK_ARROW_UP, OS.GTK_SHADOW_OUT); |
| OS.gtk_container_add (handle, arrow); |
| OS.gtk_widget_show (arrow); |
| break; |
| case SWT.TOGGLE: |
| handle = OS.gtk_toggle_button_new (); |
| break; |
| case SWT.CHECK: |
| handle = OS.gtk_check_button_new (); |
| break; |
| case SWT.RADIO: |
| handle = OS.gtk_radio_button_new (parent.radioGroup()); |
| break; |
| case SWT.PUSH: |
| default: |
| handle = OS.gtk_button_new (); |
| break; |
| } |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| } |
| |
| void setHandleStyle() {} |
| |
| void configure() { |
| _connectParent(); |
| OS.gtk_container_add (boxHandle, handle); |
| } |
| |
| void showHandle() { |
| OS.gtk_widget_show (boxHandle); |
| OS.gtk_widget_show (handle); |
| OS.gtk_widget_realize (handle); |
| } |
| |
| void hookEvents () { |
| super.hookEvents(); |
| /* |
| * Feature in GTK. For some reason, when the widget |
| * is a check or radio button, mouse move and key |
| * release events are not signaled. The fix is to |
| * look for them on the parent. |
| */ |
| if ((style & (SWT.CHECK | SWT.RADIO)) != 0) { |
| int mask = OS.GDK_POINTER_MOTION_MASK | OS.GDK_KEY_RELEASE_MASK; |
| OS.gtk_widget_add_events (boxHandle, mask); |
| signal_connect_after (boxHandle, "motion_notify_event", SWT.MouseMove, 3); |
| signal_connect_after (boxHandle, "key_release_event", SWT.KeyUp, 3); |
| } |
| signal_connect (handle, "clicked", SWT.Selection, 2); |
| } |
| |
| void register () { |
| super.register (); |
| WidgetTable.put (boxHandle, this); |
| } |
| |
| void createWidget (int index) { |
| super.createWidget (index); |
| text = ""; |
| } |
| |
| int topHandle () { return boxHandle; } |
| |
| /** |
| * 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 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. 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; |
| return OS.gtk_toggle_button_get_active (handle); |
| } |
| |
| /** |
| * 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); |
| } |
| |
| /** |
| * 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); |
| int arrow_type = OS.GTK_ARROW_UP; |
| switch (alignment) { |
| case SWT.UP: |
| arrow_type = OS.GTK_ARROW_UP; |
| break; |
| case SWT.DOWN: |
| arrow_type = OS.GTK_ARROW_DOWN; |
| break; |
| case SWT.LEFT: |
| arrow_type = OS.GTK_ARROW_LEFT; |
| break; |
| case SWT.RIGHT: |
| arrow_type = OS.GTK_ARROW_RIGHT; |
| break; |
| } |
| int list = OS.gtk_container_children (handle); |
| int arrow = OS.g_list_nth_data (list, 0); |
| OS.gtk_arrow_set (arrow, arrow_type, OS.GTK_SHADOW_OUT); |
| 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 list = OS.gtk_container_children (handle); |
| int label = OS.g_list_nth_data (list, 0); |
| if (label == 0) return; |
| boolean isText = OS.GTK_WIDGET_TYPE (handle) == OS.gtk_label_get_type (); |
| if ((style & SWT.LEFT) != 0) { |
| OS.gtk_misc_set_alignment (label, 0.0f, 0.5f); |
| if (isText) OS.gtk_label_set_justify (label, OS.GTK_JUSTIFY_LEFT); |
| return; |
| } |
| if ((style & SWT.CENTER) != 0) { |
| OS.gtk_misc_set_alignment (label, 0.5f, 0.5f); |
| if (isText) OS.gtk_label_set_justify (label, OS.GTK_JUSTIFY_CENTER); |
| return; |
| } |
| if ((style & SWT.RIGHT) != 0) { |
| OS.gtk_misc_set_alignment (label, 1.0f, 0.5f); |
| if (isText) OS.gtk_label_set_justify (label, OS.GTK_JUSTIFY_RIGHT); |
| return; |
| } |
| } |
| |
| /** |
| * 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 (); |
| this.image = image; |
| if ((style & SWT.ARROW) != 0) return; |
| int list = OS.gtk_container_children (handle); |
| if (list != 0) { |
| int widget = OS.g_list_nth_data (list, 0); |
| if (widget != 0) OS.gtk_widget_destroy (widget); |
| } |
| if (image != null) { |
| int pixmap = OS.gtk_pixmap_new (image.pixmap, image.mask); |
| OS.gtk_container_add (handle, pixmap); |
| OS.gtk_widget_show (pixmap); |
| } |
| } |
| |
| /** |
| * 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(); |
| return text; |
| } |
| |
| /** |
| * 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. |
| * |
| * @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; |
| OS.gtk_signal_handler_block_by_data (handle, SWT.Selection); |
| OS.gtk_toggle_button_set_active (handle, selected); |
| OS.gtk_signal_handler_unblock_by_data (handle, SWT.Selection); |
| } |
| |
| /** |
| * 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> |
| * |
| * @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); |
| text = string; |
| if ((style & SWT.ARROW) != 0) return; |
| int length = string.length (); |
| char [] text = new char [length + 1]; |
| char [] pattern = new char [length + 1]; |
| string.getChars (0, length, text, 0); |
| int i = 0, j = 0; |
| while (i < length) { |
| pattern [j] = ' '; |
| if (text [i] == '&') { |
| i++; |
| if (i < length && text [i] != '&') { |
| pattern [j] = '_'; |
| } |
| } |
| text [j++] = text [i++]; |
| } |
| while (j < i) { |
| text [j] = pattern [j] = '\0'; |
| j++; |
| } |
| int list = OS.gtk_container_children (handle); |
| if (list != 0) { |
| int widget = OS.g_list_nth_data (list, 0); |
| if (widget != 0) OS.gtk_widget_destroy (widget); |
| } |
| byte [] buffer1 = Converter.wcsToMbcs (null, text); |
| int label = OS.gtk_label_new (buffer1); |
| byte [] buffer2 = Converter.wcsToMbcs (null, pattern); |
| OS.gtk_label_set_pattern (label, buffer2); |
| OS.gtk_container_add (handle, label); |
| OS.gtk_widget_show (label); |
| } |
| |
| int processSelection (int int0, int int1, int int2) { |
| postEvent(SWT.Selection); |
| return 0; |
| } |
| |
| void deregister () { |
| super.deregister (); |
| WidgetTable.remove (boxHandle); |
| } |
| |
| void releaseWidget () { |
| super.releaseWidget (); |
| image = null; |
| text = null; |
| } |
| |
| void releaseHandle () { |
| super.releaseHandle (); |
| boxHandle = 0; |
| } |
| |
| } |