| /******************************************************************************* |
| * Copyright (c) 2000, 2017 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.gtk.*; |
| |
| /** |
| * Instances of the receiver represent a selectable user interface object |
| * that allows the user to drag a rubber banded outline of the sash within |
| * the parent control. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>HORIZONTAL, VERTICAL, SMOOTH</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Selection</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of the styles HORIZONTAL and VERTICAL 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/#sash">Sash 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 Sash extends Control { |
| boolean dragging; |
| int startX, startY, lastX, lastY; |
| long /*int*/ defaultCursor; |
| |
| private final static int INCREMENT = 1; |
| private final static int PAGE_INCREMENT = 9; |
| |
| /** |
| * 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#HORIZONTAL |
| * @see SWT#VERTICAL |
| * @see SWT#SMOOTH |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Sash (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 the user, by sending |
| * it one of the messages defined in the <code>SelectionListener</code> |
| * interface. |
| * <p> |
| * When <code>widgetSelected</code> is called, the x, y, width, and height fields of the event object are valid. |
| * If the receiver is being dragged, the event object detail field contains the value <code>SWT.DRAG</code>. |
| * <code>widgetDefaultSelected</code> is not called. |
| * </p> |
| * |
| * @param listener the listener which should be notified when the control is selected by the user |
| * |
| * @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); |
| } |
| |
| static int checkStyle (int style) { |
| style |= SWT.SMOOTH; |
| return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0); |
| } |
| |
| @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; |
| int border = getBorderWidthInPixels (); |
| int width = border * 2, height = border * 2; |
| if ((style & SWT.HORIZONTAL) != 0) { |
| width += DEFAULT_WIDTH; height += 3; |
| } else { |
| width += 3; height += DEFAULT_HEIGHT; |
| } |
| if (wHint != SWT.DEFAULT) width = wHint + (border * 2); |
| if (hHint != SWT.DEFAULT) height = hHint + (border * 2); |
| return new Point (width, height); |
| } |
| |
| @Override |
| void createHandle (int index) { |
| state |= HANDLE | THEME_BACKGROUND; |
| handle = OS.g_object_new (display.gtk_fixed_get_type (), 0); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.gtk_widget_set_has_window (handle, true); |
| OS.gtk_widget_set_can_focus (handle, true); |
| int type = (style & SWT.VERTICAL) != 0 ? OS.GDK_SB_H_DOUBLE_ARROW : OS.GDK_SB_V_DOUBLE_ARROW; |
| defaultCursor = OS.gdk_cursor_new_for_display (OS.gdk_display_get_default(), type); |
| } |
| |
| void drawBand (int x, int y, int width, int height) { |
| if ((style & SWT.SMOOTH) != 0) return; |
| long /*int*/ window = gtk_widget_get_window (parent.paintHandle()); |
| if (window == 0) return; |
| byte [] bits = {-86, 85, -86, 85, -86, 85, -86, 85}; |
| long /*int*/ stipplePixmap = OS.gdk_bitmap_create_from_data (window, bits, 8, 8); |
| long /*int*/ gc = OS.gdk_gc_new (window); |
| long /*int*/ colormap = OS.gdk_colormap_get_system(); |
| GdkColor color = new GdkColor (); |
| OS.gdk_color_white (colormap, color); |
| OS.gdk_gc_set_foreground (gc, color); |
| OS.gdk_gc_set_stipple (gc, stipplePixmap); |
| OS.gdk_gc_set_subwindow (gc, OS.GDK_INCLUDE_INFERIORS); |
| OS.gdk_gc_set_fill (gc, OS.GDK_STIPPLED); |
| OS.gdk_gc_set_function (gc, OS.GDK_XOR); |
| OS.gdk_draw_rectangle (window, gc, 1, x, y, width, height); |
| OS.g_object_unref (stipplePixmap); |
| OS.g_object_unref (gc); |
| } |
| |
| @Override |
| long /*int*/ gtk_button_press_event (long /*int*/ widget, long /*int*/ eventPtr) { |
| long /*int*/ result = super.gtk_button_press_event (widget, eventPtr); |
| if (result != 0) return result; |
| GdkEventButton gdkEvent = new GdkEventButton (); |
| OS.memmove (gdkEvent, eventPtr, GdkEventButton.sizeof); |
| int button = gdkEvent.button; |
| if (button != 1) return 0; |
| if (gdkEvent.type == OS.GDK_2BUTTON_PRESS) return 0; |
| if (gdkEvent.type == OS.GDK_3BUTTON_PRESS) return 0; |
| long /*int*/ window = gtk_widget_get_window (widget); |
| int [] origin_x = new int [1], origin_y = new int [1]; |
| OS.gdk_window_get_origin (window, origin_x, origin_y); |
| startX = (int) (gdkEvent.x_root - origin_x [0]); |
| startY = (int) (gdkEvent.y_root - origin_y [0]); |
| GtkAllocation allocation = new GtkAllocation (); |
| OS.gtk_widget_get_allocation(handle, allocation); |
| int x = allocation.x; |
| int y = allocation.y; |
| int width = allocation.width; |
| int height = allocation.height; |
| lastX = x; |
| lastY = y; |
| Event event = new Event (); |
| event.time = gdkEvent.time; |
| Rectangle eventRect = new Rectangle (lastX, lastY, width, height); |
| event.setBounds (DPIUtil.autoScaleDown (eventRect)); |
| if ((style & SWT.SMOOTH) == 0) { |
| event.detail = SWT.DRAG; |
| } |
| if ((parent.style & SWT.MIRRORED) != 0) event.x = DPIUtil.autoScaleDown (parent.getClientWidth () - width) - event.x; |
| sendSelectionEvent (SWT.Selection, event, true); |
| if (isDisposed ()) return 0; |
| if (event.doit) { |
| dragging = true; |
| Rectangle rect = DPIUtil.autoScaleUp (event.getBounds ()); |
| lastX = rect.x; |
| lastY = rect.y; |
| if ((parent.style & SWT.MIRRORED) != 0) lastX = parent.getClientWidth () - width - lastX; |
| parent.update (true, (style & SWT.SMOOTH) == 0); |
| drawBand (lastX, rect.y, width, height); |
| if ((style & SWT.SMOOTH) != 0) { |
| setBoundsInPixels (rect.x, rect.y, width, height); |
| // widget could be disposed at this point |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| long /*int*/ gtk_button_release_event (long /*int*/ widget, long /*int*/ eventPtr) { |
| long /*int*/ result = super.gtk_button_release_event (widget, eventPtr); |
| if (result != 0) return result; |
| GdkEventButton gdkEvent = new GdkEventButton (); |
| OS.memmove (gdkEvent, eventPtr, GdkEventButton.sizeof); |
| int button = gdkEvent.button; |
| if (button != 1) return 0; |
| if (!dragging) return 0; |
| dragging = false; |
| GtkAllocation allocation = new GtkAllocation (); |
| OS.gtk_widget_get_allocation (handle, allocation); |
| int width = allocation.width; |
| int height = allocation.height; |
| Event event = new Event (); |
| event.time = gdkEvent.time; |
| Rectangle eventRect = new Rectangle (lastX, lastY, width, height); |
| event.setBounds (DPIUtil.autoScaleDown (eventRect)); |
| drawBand (lastX, lastY, width, height); |
| if ((parent.style & SWT.MIRRORED) != 0) event.x = DPIUtil.autoScaleDown (parent.getClientWidth () - width) - event.x; |
| sendSelectionEvent (SWT.Selection, event, true); |
| if (isDisposed ()) return result; |
| if (event.doit) { |
| if ((style & SWT.SMOOTH) != 0) { |
| Rectangle rect = DPIUtil.autoScaleUp (event.getBounds ()); |
| setBoundsInPixels (rect.x, rect.y, width, height); |
| // widget could be disposed at this point |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| long /*int*/ gtk_draw (long /*int*/ widget, long /*int*/ cairo) { |
| if (OS.GTK_VERSION >= OS.VERSION(3, 14, 0)) { |
| long /*int*/ context = OS.gtk_widget_get_style_context(widget); |
| GtkAllocation allocation = new GtkAllocation(); |
| OS.gtk_widget_get_allocation (widget, allocation); |
| int width = (state & ZERO_WIDTH) != 0 ? 0 : allocation.width; |
| int height = (state & ZERO_HEIGHT) != 0 ? 0 : allocation.height; |
| // We specify a 0 value for x & y as we want the whole widget to be |
| // colored, not some portion of it. |
| OS.gtk_render_background(context, cairo, 0, 0, width, height); |
| } |
| return super.gtk_draw(widget, cairo); |
| } |
| |
| @Override |
| long /*int*/ gtk_focus_in_event (long /*int*/ widget, long /*int*/ event) { |
| long /*int*/ result = super.gtk_focus_in_event (widget, event); |
| if (result != 0) return result; |
| // widget could be disposed at this point |
| if (handle != 0) { |
| GtkAllocation allocation = new GtkAllocation (); |
| OS.gtk_widget_get_allocation (handle, allocation); |
| lastX = allocation.x; |
| lastY = allocation.y; |
| } |
| return 0; |
| } |
| |
| @Override |
| long /*int*/ gtk_key_press_event (long /*int*/ widget, long /*int*/ eventPtr) { |
| long /*int*/ result = super.gtk_key_press_event (widget, eventPtr); |
| if (result != 0) return result; |
| GdkEventKey gdkEvent = new GdkEventKey (); |
| OS.memmove (gdkEvent, eventPtr, GdkEventKey.sizeof); |
| int keyval = gdkEvent.keyval; |
| switch (keyval) { |
| case OS.GDK_Left: |
| case OS.GDK_Right: |
| case OS.GDK_Up: |
| case OS.GDK_Down: |
| int xChange = 0, yChange = 0; |
| int stepSize = PAGE_INCREMENT; |
| if ((gdkEvent.state & OS.GDK_CONTROL_MASK) != 0) stepSize = INCREMENT; |
| if ((style & SWT.VERTICAL) != 0) { |
| if (keyval == OS.GDK_Up || keyval == OS.GDK_Down) break; |
| xChange = keyval == OS.GDK_Left ? -stepSize : stepSize; |
| } else { |
| if (keyval == OS.GDK_Left ||keyval == OS.GDK_Right) break; |
| yChange = keyval == OS.GDK_Up ? -stepSize : stepSize; |
| } |
| int parentBorder = 0; |
| GtkAllocation allocation = new GtkAllocation (); |
| OS.gtk_widget_get_allocation (handle, allocation); |
| int width = allocation.width; |
| int height = allocation.height; |
| OS.gtk_widget_get_allocation (parent.handle, allocation); |
| int parentWidth = allocation.width; |
| int parentHeight = allocation.height; |
| int newX = lastX, newY = lastY; |
| if ((style & SWT.VERTICAL) != 0) { |
| newX = Math.min (Math.max (0, lastX + xChange - parentBorder - startX), parentWidth - width); |
| } else { |
| newY = Math.min (Math.max (0, lastY + yChange - parentBorder - startY), parentHeight - height); |
| } |
| if (newX == lastX && newY == lastY) return result; |
| |
| /* Ensure that the pointer image does not change */ |
| long /*int*/ window = gtk_widget_get_window (handle); |
| int grabMask = OS.GDK_POINTER_MOTION_MASK | OS.GDK_BUTTON_RELEASE_MASK; |
| long /*int*/ gdkCursor = cursor != null ? cursor.handle : defaultCursor; |
| int ptrGrabResult = gdk_pointer_grab (window, OS.GDK_OWNERSHIP_NONE, false, grabMask, window, gdkCursor, OS.GDK_CURRENT_TIME); |
| |
| /* The event must be sent because its doit flag is used. */ |
| Event event = new Event (); |
| event.time = gdkEvent.time; |
| Rectangle eventRect = new Rectangle (newX, newY, width, height); |
| event.setBounds (DPIUtil.autoScaleDown (eventRect)); |
| if ((parent.style & SWT.MIRRORED) != 0) event.x = DPIUtil.autoScaleDown (parent.getClientWidth () - width) - event.x; |
| sendSelectionEvent (SWT.Selection, event, true); |
| if (ptrGrabResult == OS.GDK_GRAB_SUCCESS) gdk_pointer_ungrab (window, OS.GDK_CURRENT_TIME); |
| if (isDisposed ()) break; |
| |
| if (event.doit) { |
| Rectangle rect = DPIUtil.autoScaleUp (event.getBounds ()); |
| lastX = rect.x; |
| lastY = rect.y; |
| if ((parent.style & SWT.MIRRORED) != 0) lastX = parent.getClientWidth () - width - lastX; |
| if ((style & SWT.SMOOTH) != 0) { |
| setBoundsInPixels (rect.x, rect.y, width, height); |
| if (isDisposed ()) break; |
| } |
| int cursorX = rect.x, cursorY = rect.y; |
| if ((style & SWT.VERTICAL) != 0) { |
| cursorY += height / 2; |
| } else { |
| cursorX += width / 2; |
| } |
| display.setCursorLocation (parent.toDisplayInPixels (cursorX, cursorY)); |
| } |
| break; |
| } |
| |
| return result; |
| } |
| |
| @Override |
| long /*int*/ gtk_motion_notify_event (long /*int*/ widget, long /*int*/ eventPtr) { |
| long /*int*/ result = super.gtk_motion_notify_event (widget, eventPtr); |
| if (result != 0) return result; |
| if (!dragging) return 0; |
| GdkEventMotion gdkEvent = new GdkEventMotion (); |
| OS.memmove (gdkEvent, eventPtr, GdkEventButton.sizeof); |
| int eventX, eventY, eventState; |
| if (gdkEvent.is_hint != 0) { |
| int [] pointer_x = new int [1], pointer_y = new int [1], mask = new int [1]; |
| gdk_window_get_device_position (gdkEvent.window, pointer_x, pointer_y, mask); |
| eventX = pointer_x [0]; |
| eventY = pointer_y [0]; |
| eventState = mask [0]; |
| } else { |
| int [] origin_x = new int [1], origin_y = new int [1]; |
| OS.gdk_window_get_origin (gdkEvent.window, origin_x, origin_y); |
| eventX = (int) (gdkEvent.x_root - origin_x [0]); |
| eventY = (int) (gdkEvent.y_root - origin_y [0]); |
| eventState = gdkEvent.state; |
| } |
| if ((eventState & OS.GDK_BUTTON1_MASK) == 0) return 0; |
| GtkAllocation allocation = new GtkAllocation (); |
| OS.gtk_widget_get_allocation (handle, allocation); |
| int x = allocation.x; |
| int y = allocation.y; |
| int width = allocation.width; |
| int height = allocation.height; |
| int parentBorder = 0; |
| OS.gtk_widget_get_allocation (parent.handle, allocation); |
| int parentWidth = allocation.width; |
| int parentHeight = allocation.height; |
| int newX = lastX, newY = lastY; |
| if ((style & SWT.VERTICAL) != 0) { |
| newX = Math.min (Math.max (0, eventX + x - startX - parentBorder), parentWidth - width); |
| } else { |
| newY = Math.min (Math.max (0, eventY + y - startY - parentBorder), parentHeight - height); |
| } |
| if (newX == lastX && newY == lastY) return 0; |
| drawBand (lastX, lastY, width, height); |
| |
| Event event = new Event (); |
| event.time = gdkEvent.time; |
| Rectangle eventRect = new Rectangle (newX, newY, width, height); |
| event.setBounds (DPIUtil.autoScaleDown (eventRect)); |
| if ((style & SWT.SMOOTH) == 0) { |
| event.detail = SWT.DRAG; |
| } |
| if ((parent.style & SWT.MIRRORED) != 0) event.x = DPIUtil.autoScaleDown (parent.getClientWidth () - width) - event.x; |
| sendSelectionEvent (SWT.Selection, event, true); |
| if (isDisposed ()) return 0; |
| Rectangle rect = DPIUtil.autoScaleUp (event.getBounds ()); |
| if (event.doit) { |
| lastX = rect.x; |
| lastY = rect.y; |
| if ((parent.style & SWT.MIRRORED) != 0) lastX = parent.getClientWidth () - width - lastX; |
| } |
| parent.update (true, (style & SWT.SMOOTH) == 0); |
| drawBand (lastX, lastY, width, height); |
| if ((style & SWT.SMOOTH) != 0) { |
| setBoundsInPixels (rect.x, lastY, width, height); |
| // widget could be disposed at this point |
| } |
| return result; |
| } |
| |
| @Override |
| long /*int*/ gtk_realize (long /*int*/ widget) { |
| setCursor (cursor != null ? cursor.handle : 0); |
| return super.gtk_realize (widget); |
| } |
| |
| @Override |
| void hookEvents () { |
| super.hookEvents (); |
| OS.gtk_widget_add_events (handle, OS.GDK_POINTER_MOTION_HINT_MASK); |
| } |
| |
| @Override |
| void releaseWidget () { |
| super.releaseWidget (); |
| if (defaultCursor != 0) gdk_cursor_unref (defaultCursor); |
| defaultCursor = 0; |
| } |
| |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the control is selected by the user. |
| * |
| * @param listener the listener which should no longer 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); |
| } |
| |
| @Override |
| void setCursor (long /*int*/ cursor) { |
| super.setCursor (cursor != 0 ? cursor : defaultCursor); |
| } |
| |
| @Override |
| int traversalCode (int key, GdkEventKey event) { |
| return 0; |
| } |
| |
| } |