diff options
Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Button.java')
| -rw-r--r-- | bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Button.java | 493 |
1 files changed, 493 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Button.java b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Button.java new file mode 100644 index 0000000000..c08b892a20 --- /dev/null +++ b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Button.java @@ -0,0 +1,493 @@ +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; +} + +}
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