| /******************************************************************************* |
| * Copyright (c) 2000, 2018 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.accessibility.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.gtk.*; |
| import org.eclipse.swt.internal.gtk3.*; |
| import org.eclipse.swt.internal.gtk4.*; |
| |
| /** |
| * Instances of this class represent a non-selectable |
| * user interface object that displays a string or image. |
| * When SEPARATOR is specified, displays a single |
| * vertical or horizontal line. |
| * <p> |
| * Shadow styles are hints and may not be honored |
| * by the platform. To create a separator label |
| * with the default shadow style for the platform, |
| * do not specify a shadow style. |
| * </p> |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>SEPARATOR, HORIZONTAL, VERTICAL</dd> |
| * <dd>SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd> |
| * <dd>CENTER, LEFT, RIGHT, WRAP</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>(none)</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of SHADOW_IN, SHADOW_OUT and SHADOW_NONE may be specified. |
| * SHADOW_NONE is a HINT. Only one of HORIZONTAL and VERTICAL may be specified. |
| * Only one of CENTER, LEFT and RIGHT may be specified. |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/snippets/#label">Label 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 Label extends Control { |
| long frameHandle, labelHandle, imageHandle, 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 |
| * 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#SEPARATOR |
| * @see SWT#HORIZONTAL |
| * @see SWT#VERTICAL |
| * @see SWT#SHADOW_IN |
| * @see SWT#SHADOW_OUT |
| * @see SWT#SHADOW_NONE |
| * @see SWT#CENTER |
| * @see SWT#LEFT |
| * @see SWT#RIGHT |
| * @see SWT#WRAP |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Label (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| |
| static int checkStyle (int style) { |
| style |= SWT.NO_FOCUS; |
| if ((style & SWT.SEPARATOR) != 0) { |
| style = checkBits (style, SWT.VERTICAL, SWT.HORIZONTAL, 0, 0, 0, 0); |
| return checkBits (style, SWT.SHADOW_OUT, SWT.SHADOW_IN, SWT.SHADOW_NONE, 0, 0, 0); |
| } |
| return checkBits (style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0); |
| } |
| |
| @Override |
| void addRelation (Control control) { |
| if (!control.isDescribedByLabel ()) return; |
| if (labelHandle == 0) return; |
| control._getAccessible().addRelation(ACC.RELATION_LABELLED_BY, _getAccessible()); |
| control.labelRelation = this; |
| } |
| |
| @Override |
| Point computeNativeSize (long h, int wHint, int hHint, boolean changed) { |
| int width = wHint, height = hHint; |
| /* |
| * Feature in GTK3: Labels with long text have an extremely large natural width. |
| * As a result, such Labels created with SWT.WRAP end up being too big. The fix |
| * is to use the minimum width instead of the natural width when SWT.WRAP is specified. |
| * In all other cases, use the natural width. See bug 534768. |
| */ |
| boolean wrap = labelHandle != 0 && (style & SWT.WRAP) != 0 && GTK.gtk_widget_get_visible (labelHandle); |
| if (wrap && wHint == SWT.DEFAULT && hHint == SWT.DEFAULT) { |
| GtkRequisition naturalSize = new GtkRequisition (); |
| GtkRequisition minimumSize = new GtkRequisition (); |
| GTK.gtk_widget_get_preferred_size(h, minimumSize, naturalSize); |
| width = minimumSize.width; |
| height = naturalSize.height; |
| return new Point(width, height); |
| } else { |
| return super.computeNativeSize(h, wHint, hHint, changed); |
| } |
| } |
| @Override |
| Point computeSizeInPixels (int wHint, int hHint, boolean changed) { |
| checkWidget (); |
| if (wHint != SWT.DEFAULT && wHint < 0) wHint = 0; |
| if (hHint != SWT.DEFAULT && hHint < 0) hHint = 0; |
| if ((style & SWT.SEPARATOR) != 0) { |
| if ((style & SWT.HORIZONTAL) != 0) { |
| if (wHint == SWT.DEFAULT) wHint = DEFAULT_WIDTH; |
| } else { |
| if (hHint == SWT.DEFAULT) hHint = DEFAULT_HEIGHT; |
| } |
| } |
| Point size; |
| /* |
| * Feature in GTK. GTK has a predetermined maximum width for wrapping text. |
| * The fix is to use pango layout directly instead of the label size request |
| * to calculate its preferred size. |
| */ |
| boolean fixWrap = labelHandle != 0 && (style & SWT.WRAP) != 0 && GTK.gtk_widget_get_visible (labelHandle); |
| if (fixWrap || frameHandle != 0) forceResize (); |
| if (fixWrap) { |
| long labelLayout = GTK.gtk_label_get_layout (labelHandle); |
| int pangoWidth = OS.pango_layout_get_width (labelLayout); |
| if (wHint != SWT.DEFAULT) { |
| OS.pango_layout_set_width (labelLayout, wHint * OS.PANGO_SCALE); |
| } else { |
| OS.pango_layout_set_width (labelLayout, -1); |
| } |
| int [] w = new int [1], h = new int [1]; |
| OS.pango_layout_get_pixel_size (labelLayout, w, h); |
| OS.pango_layout_set_width (labelLayout, pangoWidth); |
| if (frameHandle != 0) { |
| int [] labelWidth = new int [1], labelHeight = new int [1]; |
| GTK.gtk_widget_get_size_request (labelHandle, labelWidth, labelHeight); |
| GTK.gtk_widget_set_size_request (labelHandle, 1, 1); |
| size = computeNativeSize (frameHandle, -1, -1, changed); |
| GTK.gtk_widget_set_size_request (labelHandle, labelWidth [0], labelHeight [0]); |
| size.x = size.x - 1; |
| size.y = size.y - 1; |
| } else { |
| size = new Point (0,0); |
| } |
| size.x += wHint == SWT.DEFAULT ? w [0] : wHint; |
| size.y += hHint == SWT.DEFAULT ? h [0] : hHint; |
| } else { |
| if (frameHandle != 0) { |
| int [] reqWidth = new int [1], reqHeight = new int [1]; |
| GTK.gtk_widget_get_size_request (handle, reqWidth, reqHeight); |
| GTK.gtk_widget_set_size_request (handle, wHint, hHint); |
| size = computeNativeSize (frameHandle, -1, -1, changed); |
| GTK.gtk_widget_set_size_request (handle, reqWidth [0], reqHeight [0]); |
| } else { |
| size = computeNativeSize (handle, wHint, hHint, changed); |
| } |
| } |
| /* |
| * Feature in GTK. Instead of using the font height to determine |
| * the preferred height of the widget, GTK uses the text metrics. |
| * The fix is to ensure that the preferred height is at least as |
| * tall as the font height. |
| * |
| * NOTE: This work around does not fix the case when there are |
| * muliple lines of text. |
| */ |
| if (hHint == SWT.DEFAULT && labelHandle != 0) { |
| long layout = GTK.gtk_label_get_layout (labelHandle); |
| long context = OS.pango_layout_get_context (layout); |
| long lang = OS.pango_context_get_language (context); |
| long font = getFontDescription (); |
| long metrics = OS.pango_context_get_metrics (context, font, lang); |
| OS.pango_font_description_free (font); |
| int ascent = OS.PANGO_PIXELS (OS.pango_font_metrics_get_ascent (metrics)); |
| int descent = OS.PANGO_PIXELS (OS.pango_font_metrics_get_descent (metrics)); |
| OS.pango_font_metrics_unref (metrics); |
| int fontHeight = ascent + descent; |
| int [] bufferBottom = new int [1]; |
| int [] bufferTop = new int [1]; |
| OS.g_object_get(labelHandle, OS.margin_bottom, bufferBottom, 0); |
| OS.g_object_get(labelHandle, OS.margin_top, bufferTop, 0); |
| fontHeight += bufferBottom [0] + bufferTop [0]; |
| if (frameHandle != 0) { |
| fontHeight += 2 * getThickness (frameHandle).y; |
| fontHeight += 2 * gtk_container_get_border_width_or_margin (frameHandle); |
| } |
| size.y = Math.max (size.y, fontHeight); |
| } |
| return size; |
| } |
| |
| @Override |
| void createHandle (int index) { |
| state |= HANDLE | THEME_BACKGROUND; |
| |
| fixedHandle = OS.g_object_new(display.gtk_fixed_get_type(), 0); |
| if (fixedHandle == 0) error(SWT.ERROR_NO_HANDLES); |
| if (!GTK.GTK4) GTK3.gtk_widget_set_has_window(fixedHandle, true); |
| |
| if ((style & SWT.SEPARATOR) != 0) { |
| if ((style & SWT.HORIZONTAL)!= 0) { |
| handle = GTK.gtk_separator_new (GTK.GTK_ORIENTATION_HORIZONTAL); |
| if (handle != 0) { |
| GTK.gtk_widget_set_valign(handle, GTK.GTK_ALIGN_CENTER); |
| } |
| } else { |
| handle = GTK.gtk_separator_new (GTK.GTK_ORIENTATION_VERTICAL); |
| if (handle != 0) { |
| GTK.gtk_widget_set_halign(handle, GTK.GTK_ALIGN_CENTER); |
| } |
| } |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| } else { |
| if (GTK.GTK4) { |
| handle = gtk_box_new(GTK.GTK_ORIENTATION_HORIZONTAL, false, 0); |
| if (handle == 0) error(SWT.ERROR_NO_HANDLES); |
| |
| labelHandle = GTK.gtk_label_new_with_mnemonic(null); |
| if (labelHandle == 0) error(SWT.ERROR_NO_HANDLES); |
| |
| imageHandle = GTK4.gtk_picture_new(); |
| if (imageHandle == 0) error(SWT.ERROR_NO_HANDLES); |
| |
| GTK4.gtk_box_append(handle, labelHandle); |
| GTK4.gtk_box_append(handle, imageHandle); |
| gtk_box_set_child_packing(handle, labelHandle, true, true, 0, GTK.GTK_PACK_START); |
| gtk_box_set_child_packing(handle, imageHandle, true, true, 0, GTK.GTK_PACK_START); |
| } else { |
| handle = GTK3.gtk_event_box_new(); |
| if (handle == 0) error(SWT.ERROR_NO_HANDLES); |
| |
| boxHandle = gtk_box_new(GTK.GTK_ORIENTATION_HORIZONTAL, false, 0); |
| if (boxHandle == 0) error(SWT.ERROR_NO_HANDLES); |
| |
| labelHandle = GTK.gtk_label_new_with_mnemonic(null); |
| if (labelHandle == 0) error(SWT.ERROR_NO_HANDLES); |
| |
| imageHandle = GTK.gtk_image_new(); |
| if (imageHandle == 0) error(SWT.ERROR_NO_HANDLES); |
| |
| GTK3.gtk_container_add(handle, boxHandle); |
| GTK3.gtk_container_add(boxHandle, labelHandle); |
| GTK3.gtk_container_add(boxHandle, imageHandle); |
| gtk_box_set_child_packing(boxHandle, labelHandle, true, true, 0, GTK.GTK_PACK_START); |
| gtk_box_set_child_packing(boxHandle, imageHandle, true, true, 0, GTK.GTK_PACK_START); |
| } |
| } |
| if ((style & SWT.BORDER) != 0) { |
| frameHandle = GTK.gtk_frame_new (null); |
| if (frameHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| if (GTK.GTK4) { |
| OS.swt_fixed_add(fixedHandle, frameHandle); |
| GTK4.gtk_frame_set_child(frameHandle, handle); |
| } else { |
| GTK3.gtk_container_add (fixedHandle, frameHandle); |
| GTK3.gtk_container_add (frameHandle, handle); |
| GTK3.gtk_frame_set_shadow_type (frameHandle, GTK.GTK_SHADOW_ETCHED_IN); |
| } |
| } else { |
| if (GTK.GTK4) { |
| OS.swt_fixed_add(fixedHandle, handle); |
| } else { |
| GTK3.gtk_container_add (fixedHandle, handle); |
| } |
| } |
| if ((style & SWT.SEPARATOR) != 0) return; |
| if ((style & SWT.WRAP) != 0) { |
| if (GTK.GTK4) { |
| GTK.gtk_label_set_wrap(labelHandle, true); |
| GTK.gtk_label_set_wrap_mode(labelHandle, OS.PANGO_WRAP_WORD_CHAR); |
| } else { |
| GTK.gtk_label_set_line_wrap (labelHandle, true); |
| GTK.gtk_label_set_line_wrap_mode (labelHandle, OS.PANGO_WRAP_WORD_CHAR); |
| } |
| } |
| // In GTK 3 font description is inherited from parent widget which is not how SWT has always worked, |
| // reset to default font to get the usual behavior |
| setFontDescription(defaultFont ().handle); |
| setAlignment (); |
| } |
| |
| @Override |
| void createWidget (int index) { |
| super.createWidget (index); |
| text = ""; |
| } |
| |
| @Override |
| void deregister () { |
| super.deregister (); |
| if (frameHandle != 0) display.removeWidget (frameHandle); |
| if (labelHandle != 0) display.removeWidget (labelHandle); |
| if (imageHandle != 0) display.removeWidget (imageHandle); |
| if (boxHandle != 0) display.removeWidget (boxHandle); |
| } |
| |
| @Override |
| long eventHandle () { |
| return fixedHandle; |
| } |
| |
| @Override |
| long cssHandle () { |
| if ((style & SWT.SEPARATOR) == 0) { |
| return labelHandle; |
| } |
| return handle; |
| } |
| |
| /** |
| * 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 a <code>SEPARATOR</code> label, in |
| * which case, <code>NONE</code> is returned. |
| * |
| * @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.SEPARATOR) != 0) return 0; |
| 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; |
| } |
| |
| @Override |
| int getBorderWidthInPixels () { |
| checkWidget(); |
| if (frameHandle != 0) { |
| return getThickness (frameHandle).x; |
| } |
| return 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; |
| } |
| |
| @Override |
| String getNameText () { |
| return getText (); |
| } |
| |
| /** |
| * Returns the receiver's text, which will be an empty |
| * string if it has never been set or if the receiver is |
| * a <code>SEPARATOR</code> label. |
| * |
| * @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.SEPARATOR) != 0) return ""; |
| return text; |
| } |
| |
| @Override |
| void hookEvents () { |
| super.hookEvents(); |
| if (labelHandle != 0) { |
| OS.g_signal_connect_closure_by_id (labelHandle, display.signalIds [MNEMONIC_ACTIVATE], 0, display.getClosure (MNEMONIC_ACTIVATE), false); |
| } |
| } |
| |
| @Override |
| boolean isDescribedByLabel () { |
| return false; |
| } |
| |
| @Override |
| boolean mnemonicHit (char key) { |
| if (labelHandle == 0) return false; |
| boolean result = super.mnemonicHit (labelHandle, key); |
| if (result) { |
| Control control = this; |
| while (control.parent != null) { |
| Control [] children = control.parent._getChildren (); |
| int index = 0; |
| while (index < children.length) { |
| if (children [index] == control) break; |
| index++; |
| } |
| index++; |
| if (index < children.length) { |
| if (children [index].setFocus ()) return result; |
| } |
| control = control.parent; |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| boolean mnemonicMatch (char key) { |
| if (labelHandle == 0) return false; |
| return mnemonicMatch (labelHandle, key); |
| } |
| |
| @Override |
| void register () { |
| super.register (); |
| if (boxHandle != 0) display.addWidget (boxHandle, this); |
| if (frameHandle != 0) display.addWidget (frameHandle, this); |
| if (labelHandle != 0) display.addWidget (labelHandle, this); |
| if (imageHandle != 0) display.addWidget (imageHandle, this); |
| } |
| |
| @Override |
| void releaseHandle () { |
| super.releaseHandle (); |
| frameHandle = imageHandle = labelHandle = boxHandle = 0; |
| } |
| |
| @Override |
| void releaseWidget () { |
| super.releaseWidget (); |
| image = null; |
| text = null; |
| } |
| |
| @Override |
| void resizeHandle (int width, int height) { |
| OS.swt_fixed_resize (GTK.gtk_widget_get_parent (fixedHandle), fixedHandle, width, height); |
| long child = frameHandle != 0 ? frameHandle : handle; |
| Point sizes = resizeCalculationsGTK3 (child, width, height); |
| width = sizes.x; |
| height = sizes.y; |
| OS.swt_fixed_resize (GTK.gtk_widget_get_parent (child), child, width, height); |
| } |
| |
| /** |
| * Controls how text and images will be displayed in the receiver. |
| * The argument should be one of <code>LEFT</code>, <code>RIGHT</code> |
| * or <code>CENTER</code>. If the receiver is a <code>SEPARATOR</code> |
| * label, the argument is ignored and the alignment is not changed. |
| * |
| * @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.SEPARATOR) != 0) 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); |
| setAlignment (); |
| } |
| |
| void setAlignment () { |
| if ((style & SWT.LEFT) != 0) { |
| gtk_widget_set_align(labelHandle,GTK.GTK_ALIGN_START, GTK.GTK_ALIGN_START); //Aligns widget |
| gtk_label_set_align (0.0f, 0.0f); //Aligns text inside the widget. |
| gtk_widget_set_align(imageHandle, GTK.GTK_ALIGN_START, GTK.GTK_ALIGN_CENTER); |
| GTK.gtk_label_set_justify (labelHandle, GTK.GTK_JUSTIFY_LEFT); |
| return; |
| } |
| if ((style & SWT.CENTER) != 0) { |
| gtk_widget_set_align(labelHandle,GTK.GTK_ALIGN_CENTER, GTK.GTK_ALIGN_START); //Aligns widget |
| gtk_label_set_align (0.5f, 0.0f); //Aligns text inside the widget. |
| gtk_widget_set_align(imageHandle, GTK.GTK_ALIGN_CENTER, GTK.GTK_ALIGN_CENTER); |
| |
| GTK.gtk_label_set_justify (labelHandle, GTK.GTK_JUSTIFY_CENTER); |
| return; |
| } |
| if ((style & SWT.RIGHT) != 0) { |
| gtk_widget_set_align(labelHandle,GTK.GTK_ALIGN_END, GTK.GTK_ALIGN_START); //Aligns widget. |
| gtk_label_set_align (1.0f, 0.0f); //Aligns text inside the widget. |
| gtk_widget_set_align(imageHandle, GTK.GTK_ALIGN_END, GTK.GTK_ALIGN_CENTER); |
| GTK.gtk_label_set_justify (labelHandle, GTK.GTK_JUSTIFY_RIGHT); |
| return; |
| } |
| } |
| |
| private void gtk_label_set_align (float xalign, float yalign) { |
| GTK.gtk_label_set_xalign (labelHandle, xalign); |
| GTK.gtk_label_set_yalign (labelHandle, yalign); |
| } |
| |
| @Override |
| int setBounds (int x, int y, int width, int height, boolean move, boolean resize) { |
| /* |
| * Bug in GTK. For some reason, when the label is |
| * wrappable and its container is resized, it does not |
| * cause the label to be wrapped. The fix is to |
| * determine the size that will wrap the label |
| * and expilictly set that size to force the label |
| * to wrap. |
| * |
| * This part of the fix causes the label to be |
| * resized to the preferred size but it still |
| * won't draw properly. |
| */ |
| boolean fixWrap = resize && labelHandle != 0 && (style & SWT.WRAP) != 0; |
| if (fixWrap) GTK.gtk_widget_set_size_request (labelHandle, -1, -1); |
| int result = super.setBounds (x, y, width, height, move, resize); |
| /* |
| * Bug in GTK. For some reason, when the label is |
| * wrappable and its container is resized, it does not |
| * cause the label to be wrapped. The fix is to |
| * determine the size that will wrap the label |
| * and expilictly set that size to force the label |
| * to wrap. |
| * |
| * This part of the fix forces the label to be |
| * resized so that it will draw wrapped. |
| */ |
| if (fixWrap) { |
| GtkAllocation allocation = new GtkAllocation(); |
| GTK.gtk_widget_get_allocation (handle, allocation); |
| int labelWidth = allocation.width; |
| int labelHeight = allocation.height; |
| GTK.gtk_widget_set_size_request (labelHandle, labelWidth, labelHeight); |
| /* |
| * Bug in GTK. Setting the size request should invalidate the label's |
| * layout, but it does not. The fix is to resize the label directly. |
| */ |
| GtkRequisition requisition = new GtkRequisition (); |
| gtk_widget_get_preferred_size (labelHandle, requisition); |
| GTK.gtk_widget_get_allocation(labelHandle, allocation); |
| allocation.width = labelWidth; |
| allocation.height = labelHeight; |
| GTK.gtk_widget_size_allocate (labelHandle, allocation); |
| } |
| return result; |
| } |
| |
| @Override |
| void setFontDescription (long font) { |
| super.setFontDescription (font); |
| if (labelHandle != 0) setFontDescription (labelHandle, font); |
| |
| if (labelHandle != 0) { |
| // Bug 445801: Work around for computeSize not returning a different value after |
| // changing font, see https://bugzilla.gnome.org/show_bug.cgi?id=753116 |
| // This updates the pango context and also clears the size request cache on the GTK side. |
| int originalDirection = (style & SWT.RIGHT_TO_LEFT) != 0 ? GTK.GTK_TEXT_DIR_RTL : GTK.GTK_TEXT_DIR_LTR; |
| int tempDirection = (style & SWT.RIGHT_TO_LEFT) != 0 ? GTK.GTK_TEXT_DIR_LTR : GTK.GTK_TEXT_DIR_RTL; |
| GTK.gtk_widget_set_direction (labelHandle, tempDirection); |
| GTK.gtk_widget_set_direction (labelHandle, originalDirection); |
| } |
| } |
| |
| @Override |
| void setForegroundGdkRGBA (GdkRGBA rgba) { |
| super.setForegroundGdkRGBA (rgba); |
| setForegroundGdkRGBA (fixedHandle, rgba); |
| if (labelHandle != 0) setForegroundGdkRGBA (labelHandle, rgba); |
| if (imageHandle != 0) setForegroundGdkRGBA (imageHandle, rgba); |
| } |
| |
| @Override |
| void setOrientation (boolean create) { |
| super.setOrientation (create); |
| if ((style & SWT.RIGHT_TO_LEFT) != 0 || !create) { |
| int dir = (style & SWT.RIGHT_TO_LEFT) != 0 ? GTK.GTK_TEXT_DIR_RTL : GTK.GTK_TEXT_DIR_LTR; |
| if (labelHandle != 0) GTK.gtk_widget_set_direction (labelHandle, dir); |
| if (imageHandle != 0) GTK.gtk_widget_set_direction (imageHandle, dir); |
| } |
| } |
| |
| /** |
| * 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 (); |
| if (image != null && image.isDisposed ()) { |
| error(SWT.ERROR_INVALID_ARGUMENT); |
| } |
| if ((style & SWT.SEPARATOR) != 0) return; |
| this.image = image; |
| if (image != null) { |
| if (GTK.GTK4) { |
| long pixbuf = ImageList.createPixbuf(image); |
| long texture = GDK.gdk_texture_new_for_pixbuf(pixbuf); |
| OS.g_object_unref(pixbuf); |
| GTK4.gtk_picture_set_paintable(imageHandle, texture); |
| } else { |
| GTK.gtk_image_set_from_surface(imageHandle, image.surface); |
| } |
| GTK.gtk_widget_hide (labelHandle); |
| GTK.gtk_widget_show (imageHandle); |
| } else { |
| if (GTK.GTK4) { |
| GTK4.gtk_picture_set_paintable(imageHandle, 0); |
| } else { |
| GTK.gtk_image_set_from_surface(imageHandle, 0); |
| } |
| GTK.gtk_widget_show (labelHandle); |
| GTK.gtk_widget_hide (imageHandle); |
| } |
| } |
| |
| /** |
| * Sets the receiver's text. |
| * <p> |
| * This method sets the widget label. The label may include |
| * the mnemonic character and 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, focus is assigned |
| * to the control that follows the label. 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> |
| * <p> |
| * Note: If control characters like '\n', '\t' etc. are used |
| * in the string, then the behavior is platform dependent. |
| * </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.SEPARATOR) != 0) return; |
| text = string; |
| char [] chars = fixMnemonic (string); |
| byte [] buffer = Converter.wcsToMbcs (chars, true); |
| GTK.gtk_label_set_text_with_mnemonic (labelHandle, buffer); |
| GTK.gtk_widget_hide (imageHandle); |
| GTK.gtk_widget_show (labelHandle); |
| } |
| |
| @Override |
| void setWidgetBackground () { |
| GdkRGBA rgba = (state & BACKGROUND) != 0 ? getBackgroundGdkRGBA () : null; |
| super.setBackgroundGdkRGBA (handle, rgba); |
| } |
| |
| @Override |
| void showWidget () { |
| super.showWidget (); |
| if (frameHandle != 0) GTK.gtk_widget_show (frameHandle); |
| if (labelHandle != 0) GTK.gtk_widget_show (labelHandle); |
| if (boxHandle != 0) GTK.gtk_widget_show (boxHandle); |
| } |
| |
| @Override |
| long windowProc (long handle, long arg0, long user_data) { |
| /* |
| * For Labels/Buttons, the first widget in the tree with a GdkWindow is SwtFixed. |
| * Unfortunately this fails the check in !GTK_IS_CONTAINER check Widget.windowProc(). |
| * Instead lets override windowProc() here and check for paintHandle() compatibility. |
| * Fixes bug 481485 without re-introducing bug 483791. |
| */ |
| switch ((int)user_data) { |
| case DRAW: { |
| if (paintHandle() == handle) { |
| return gtk_draw(handle, arg0); |
| } |
| } |
| } |
| return super.windowProc(handle, arg0, user_data); |
| } |
| |
| @Override |
| long dpiChanged(long object, long arg0) { |
| super.dpiChanged(object, arg0); |
| |
| if (image != null) { |
| image.internal_gtk_refreshImageForZoom(); |
| setImage(image); |
| } |
| |
| return 0; |
| } |
| } |