| /******************************************************************************* |
| * Copyright (c) 2000, 2016 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.graphics.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.gtk.*; |
| |
| /** |
| * Instances of this class represent a selectable user interface object |
| * corresponding to a tab for a page in a tab folder. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>(none)</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>(none)</dd> |
| * </dl> |
| * <p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/snippets/#tabfolder">TabFolder, TabItem snippets</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 TabItem extends Item { |
| long labelHandle, imageHandle, pageHandle, provider; |
| Control control; |
| TabFolder parent; |
| String toolTipText; |
| |
| /** |
| * Constructs a new instance of this class given its parent |
| * (which must be a <code>TabFolder</code>) and a style value |
| * describing its behavior and appearance. The item is added |
| * to the end of the items maintained by its parent. |
| * <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 |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public TabItem (TabFolder parent, int style) { |
| super (parent, style); |
| this.parent = parent; |
| createWidget (parent.getItemCount ()); |
| } |
| |
| /** |
| * Constructs a new instance of this class given its parent |
| * (which must be a <code>TabFolder</code>), a style value |
| * describing its behavior and appearance, and the index |
| * at which to place it in the items maintained by its parent. |
| * <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 |
| * @param index the zero-relative index to store the receiver in its parent |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)</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 TabItem (TabFolder parent, int style, int index) { |
| super (parent, style); |
| this.parent = parent; |
| createWidget (index); |
| } |
| |
| @Override |
| protected void checkSubclass () { |
| if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS); |
| } |
| |
| @Override |
| void createWidget (int index) { |
| parent.createItem (this, index); |
| setOrientation (true); |
| hookEvents (); |
| register (); |
| text = ""; |
| } |
| |
| @Override |
| void deregister() { |
| super.deregister (); |
| if (labelHandle != 0) display.removeWidget (labelHandle); |
| } |
| |
| @Override |
| void destroyWidget () { |
| parent.destroyItem (this); |
| releaseHandle (); |
| } |
| |
| /** |
| * Returns a rectangle describing the receiver's size and location |
| * relative to its parent. |
| * |
| * @return the receiver's bounding rectangle |
| * |
| * @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 Rectangle getBounds () { |
| checkWidget (); |
| return DPIUtil.autoScaleDown (getBoundsInPixels ()); |
| } |
| |
| Rectangle getBoundsInPixels () { |
| checkWidget(); |
| GtkAllocation allocation = new GtkAllocation (); |
| GTK.gtk_widget_get_allocation (handle, allocation); |
| int x = allocation.x; |
| int y = allocation.y; |
| int width = (state & ZERO_WIDTH) != 0 ? 0 : allocation.width; |
| int height = (state & ZERO_HEIGHT) != 0 ? 0 : allocation.height; |
| if ((parent.style & SWT.MIRRORED) != 0) x = parent.getClientWidth () - width - x; |
| return new Rectangle (x, y, width, height); |
| } |
| |
| /** |
| * Returns the control that is used to fill the client area of |
| * the tab folder when the user selects the tab item. If no |
| * control has been set, return <code>null</code>. |
| * <p> |
| * @return the control |
| * |
| * @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 Control getControl () { |
| checkWidget (); |
| return control; |
| } |
| |
| /** |
| * Returns the receiver's parent, which must be a <code>TabFolder</code>. |
| * |
| * @return the receiver's parent |
| * |
| * @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 TabFolder getParent () { |
| checkWidget (); |
| return parent; |
| } |
| |
| /** |
| * Returns the receiver's tool tip text, or null if it has |
| * not been set. |
| * |
| * @return the receiver's tool tip 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 getToolTipText () { |
| checkWidget (); |
| return toolTipText; |
| } |
| |
| @Override |
| long gtk_enter_notify_event (long widget, long event) { |
| parent.gtk_enter_notify_event (widget, event); |
| return 0; |
| } |
| |
| @Override |
| long gtk_mnemonic_activate (long widget, long arg1) { |
| return parent.gtk_mnemonic_activate (widget, arg1); |
| } |
| |
| @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); |
| if (GTK.GTK4) { |
| long motionController = GTK.gtk_event_controller_motion_new(); |
| GTK.gtk_widget_add_controller(handle, motionController); |
| GTK.gtk_event_controller_set_propagation_phase(motionController, GTK.GTK_PHASE_TARGET); |
| |
| long enterMotionAddress = display.enterMotionScrollCallback.getAddress(); |
| OS.g_signal_connect (motionController, OS.enter, enterMotionAddress, ENTER); |
| } else { |
| OS.g_signal_connect_closure_by_id (handle, display.signalIds [ENTER_NOTIFY_EVENT], 0, display.getClosure (ENTER_NOTIFY_EVENT), false); |
| } |
| } |
| |
| @Override |
| void register () { |
| super.register (); |
| if (labelHandle != 0) display.addWidget (labelHandle, this); |
| } |
| |
| |
| @Override |
| void release (boolean destroy) { |
| //Since controls are now nested under the tabItem, |
| //tabItem is responsible for it's release. |
| if (control != null && !control.isDisposed ()) { |
| Control.gtk_widget_reparent (control, parent.parentingHandle()); |
| } |
| super.release (destroy); |
| } |
| |
| @Override |
| void releaseHandle () { |
| super.releaseHandle (); |
| pageHandle = labelHandle = imageHandle = 0; |
| parent = null; |
| } |
| |
| @Override |
| void releaseParent () { |
| super.releaseParent (); |
| int index = parent.indexOf (this); |
| if (index == parent.getSelectionIndex ()) { |
| if (control != null) control.setVisible (false); |
| } |
| } |
| |
| /** |
| * Sets the control that is used to fill the client area of |
| * the tab folder when the user selects the tab item. |
| * <p> |
| * @param control the new control (or null) |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the control has been disposed</li> |
| * <li>ERROR_INVALID_PARENT - if the control is not in the same widget tree</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 setControl (Control control) { |
| checkWidget (); |
| if (control != null) { |
| if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); |
| if (control.parent != parent) error (SWT.ERROR_INVALID_PARENT); |
| } |
| |
| if (control != null) { |
| // To understand why we reparent, see implementation note about bug 454936 at the start of TabFolder. |
| if (GTK.GTK4) { |
| long widget = control.topHandle(); |
| long parentContainer = GTK.gtk_widget_get_parent (widget); |
| if (parentContainer != 0) { |
| OS.g_object_ref (widget); //so that it won't get destroyed due to lack of references. |
| GTK.gtk_container_remove (parentContainer, widget); |
| GTK.gtk_container_add (pageHandle, widget); |
| OS.g_object_unref (widget); |
| GTK.gtk_widget_show(widget); |
| } |
| } else { |
| Control.gtk_widget_reparent (control, pageHandle); |
| } |
| } |
| |
| Control oldControl = this.control, newControl = control; |
| this.control = control; |
| int index = parent.indexOf (this), selectionIndex = parent.getSelectionIndex(); |
| if (index != selectionIndex) { |
| if (newControl != null) { |
| if (selectionIndex != -1) { |
| Control selectedControl = parent.getItem(selectionIndex).getControl(); |
| if (selectedControl == newControl) return; |
| } |
| newControl.setVisible(false); |
| return; |
| } |
| } |
| if (newControl != null) { |
| newControl.setBoundsInPixels (parent.getClientAreaInPixels ()); |
| newControl.setVisible (true); |
| } |
| |
| if ((oldControl != null) && (oldControl != newControl)) { |
| Control.gtk_widget_reparent (oldControl, parent.parentingHandle()); |
| if (newControl != null) { |
| oldControl.setVisible (false); |
| } |
| } |
| } |
| |
| void setFontDescription (long font) { |
| setFontDescription (labelHandle, font); |
| setFontDescription (imageHandle, font); |
| } |
| |
| void setForegroundRGBA (GdkRGBA rgba) { |
| setForegroundGdkRGBA (labelHandle, rgba); |
| setForegroundGdkRGBA (imageHandle, rgba); |
| } |
| |
| void setForegroundGdkRGBA (long handle, GdkRGBA rgba) { |
| GdkRGBA toSet = new GdkRGBA(); |
| if (rgba != null) { |
| toSet = rgba; |
| } else { |
| toSet = display.COLOR_WIDGET_FOREGROUND_RGBA; |
| } |
| long context = GTK.gtk_widget_get_style_context (handle); |
| // Form foreground string |
| String color = display.gtk_rgba_to_css_string(toSet); |
| String css = "* {color: " + color + ";}"; |
| |
| // Cache and apply foreground color |
| parent.cssForeground = css; |
| gtk_css_provider_load_from_css(context, css); |
| } |
| |
| void gtk_css_provider_load_from_css (long context, String css) { |
| /* Utility function. */ |
| //@param css : a 'css java' string like "{\nbackground: red;\n}". |
| if (provider == 0) { |
| provider = GTK.gtk_css_provider_new (); |
| GTK.gtk_style_context_add_provider (context, provider, GTK.GTK_STYLE_PROVIDER_PRIORITY_APPLICATION); |
| OS.g_object_unref (provider); |
| } |
| if (GTK.GTK4) { |
| GTK.gtk_css_provider_load_from_data (provider, Converter.wcsToMbcs (css, true), -1); |
| } else { |
| GTK.gtk_css_provider_load_from_data (provider, Converter.wcsToMbcs (css, true), -1, null); |
| } |
| } |
| |
| @Override |
| public void setImage (Image image) { |
| checkWidget (); |
| super.setImage (image); |
| if (image != null) { |
| ImageList imageList = parent.imageList; |
| if (imageList == null) imageList = parent.imageList = new ImageList (); |
| int imageIndex = imageList.indexOf (image); |
| if (imageIndex == -1) { |
| imageIndex = imageList.add (image); |
| } else { |
| imageList.put (imageIndex, image); |
| } |
| long pixbuf = imageList.getPixbuf (imageIndex); |
| gtk_image_set_from_gicon (imageHandle, pixbuf); |
| GTK.gtk_widget_show (imageHandle); |
| } else { |
| gtk_image_set_from_gicon (imageHandle, 0); |
| GTK.gtk_widget_hide (imageHandle); |
| } |
| } |
| |
| @Override |
| void setOrientation (boolean create) { |
| if ((parent.style & SWT.RIGHT_TO_LEFT) != 0 || !create) { |
| int dir = (parent.style & SWT.RIGHT_TO_LEFT) != 0 ? GTK.GTK_TEXT_DIR_RTL : GTK.GTK_TEXT_DIR_LTR; |
| if (handle != 0) GTK.gtk_widget_set_direction (handle, dir); |
| if (labelHandle != 0) GTK.gtk_widget_set_direction (labelHandle, dir); |
| if (imageHandle != 0) GTK.gtk_widget_set_direction (imageHandle, dir); |
| if (pageHandle != 0) GTK.gtk_widget_set_direction (pageHandle, dir); |
| } |
| } |
| |
| /** |
| * Sets the receiver's text. The string may include |
| * the mnemonic character. |
| * <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> |
| * |
| */ |
| @Override |
| public void setText (String string) { |
| checkWidget (); |
| if (string == null) error (SWT.ERROR_NULL_ARGUMENT); |
| super.setText (string); |
| char [] chars = fixMnemonic (string); |
| byte [] buffer = Converter.wcsToMbcs (chars, true); |
| GTK.gtk_label_set_text_with_mnemonic (labelHandle, buffer); |
| if (string.length () != 0) { |
| GTK.gtk_widget_show (labelHandle); |
| } else { |
| GTK.gtk_widget_hide (labelHandle); |
| } |
| } |
| |
| /** |
| * Sets the receiver's tool tip text to the argument, which |
| * may be null indicating that the default tool tip for the |
| * control will be shown. For a control that has a default |
| * tool tip, such as the Tree control on Windows, setting |
| * the tool tip text to an empty string replaces the default, |
| * causing no tool tip text to be shown. |
| * <p> |
| * The mnemonic indicator (character '&') is not displayed in a tool tip. |
| * To display a single '&' in the tool tip, the character '&' can be |
| * escaped by doubling it in the string. |
| * </p> |
| * <p> |
| * NOTE: This operation is a hint and behavior is platform specific, on Windows |
| * for CJK-style mnemonics of the form " (&C)" at the end of the tooltip text |
| * are not shown in tooltip. |
| * </p> |
| * |
| * @param string the new tool tip text (or null) |
| * |
| * @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 setToolTipText (String string) { |
| checkWidget (); |
| Shell shell = parent._getShell (); |
| shell.setToolTipText (handle, string); |
| toolTipText = string; |
| } |
| |
| } |