| /******************************************************************************* |
| * Copyright (c) 2000, 2012 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.events.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.internal.win32.*; |
| |
| /** |
| * 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; |
| final static int INCREMENT = 1; |
| 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); |
| } |
| |
| @Override |
| long /*int*/ callWindowProc (long /*int*/ hwnd, int msg, long /*int*/ wParam, long /*int*/ lParam) { |
| if (handle == 0) return 0; |
| return OS.DefWindowProc (hwnd, msg, wParam, lParam); |
| } |
| |
| @Override |
| void createHandle () { |
| super.createHandle (); |
| state |= THEME_BACKGROUND; |
| } |
| |
| static int checkStyle (int style) { |
| return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0); |
| } |
| |
| @Override Point computeSizeInPixels (int wHint, int hHint, boolean changed) { |
| checkWidget (); |
| 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); |
| } |
| |
| void drawBand (int x, int y, int width, int height) { |
| if ((style & SWT.SMOOTH) != 0) return; |
| long /*int*/ hwndTrack = parent.handle; |
| byte [] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0}; |
| long /*int*/ stippleBitmap = OS.CreateBitmap (8, 8, 1, 1, bits); |
| long /*int*/ stippleBrush = OS.CreatePatternBrush (stippleBitmap); |
| long /*int*/ hDC = OS.GetDCEx (hwndTrack, 0, OS.DCX_CACHE); |
| long /*int*/ oldBrush = OS.SelectObject (hDC, stippleBrush); |
| OS.PatBlt (hDC, x, y, width, height, OS.PATINVERT); |
| OS.SelectObject (hDC, oldBrush); |
| OS.ReleaseDC (hwndTrack, hDC); |
| OS.DeleteObject (stippleBrush); |
| OS.DeleteObject (stippleBitmap); |
| } |
| |
| /** |
| * 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 |
| TCHAR windowClass () { |
| return display.windowClass; |
| } |
| |
| @Override |
| long /*int*/ windowProc () { |
| return display.windowProc; |
| } |
| |
| @Override |
| LRESULT WM_ERASEBKGND (long /*int*/ wParam, long /*int*/ lParam) { |
| super.WM_ERASEBKGND (wParam, lParam); |
| drawBackground (wParam); |
| return LRESULT.ONE; |
| } |
| |
| @Override |
| LRESULT WM_KEYDOWN (long /*int*/ wParam, long /*int*/ lParam) { |
| LRESULT result = super.WM_KEYDOWN (wParam, lParam); |
| if (result != null) return result; |
| switch ((int)/*64*/wParam) { |
| case OS.VK_LEFT: |
| case OS.VK_RIGHT: |
| case OS.VK_UP: |
| case OS.VK_DOWN: |
| |
| /* Calculate the new x or y position */ |
| if (OS.GetKeyState (OS.VK_LBUTTON) < 0) return result; |
| int step = OS.GetKeyState (OS.VK_CONTROL) < 0 ? INCREMENT : PAGE_INCREMENT; |
| if ((style & SWT.VERTICAL) != 0) { |
| if (wParam == OS.VK_UP || wParam == OS.VK_DOWN) break; |
| if (wParam == OS.VK_LEFT) step = -step; |
| if ((parent.style & SWT.MIRRORED) != 0) step = -step; |
| } else { |
| if (wParam == OS.VK_LEFT || wParam == OS.VK_RIGHT) break; |
| if (wParam == OS.VK_UP) step = -step; |
| } |
| RECT rect = new RECT (); |
| OS.GetWindowRect (handle, rect); |
| int width = rect.right - rect.left; |
| int height = rect.bottom - rect.top; |
| long /*int*/ hwndTrack = parent.handle; |
| RECT clientRect = new RECT (); |
| OS.GetClientRect (hwndTrack, clientRect); |
| int clientWidth = clientRect.right - clientRect.left; |
| int clientHeight = clientRect.bottom - clientRect.top; |
| OS.MapWindowPoints (0, hwndTrack, rect, 2); |
| POINT cursorPt = new POINT (); |
| int newX = rect.left, newY = rect.top; |
| if ((style & SWT.VERTICAL) != 0) { |
| cursorPt.x = newX = Math.min (Math.max (clientRect.left, newX + step), clientWidth - width); |
| cursorPt.y = rect.top + height / 2; |
| } else { |
| cursorPt.x = rect.left + width / 2; |
| cursorPt.y = newY = Math.min (Math.max (clientRect.top, newY + step), clientHeight - height); |
| } |
| if (newX == rect.left && newY == rect.top) return result; |
| |
| /* Update the pointer position */ |
| OS.ClientToScreen (hwndTrack, cursorPt); |
| OS.SetCursorPos (cursorPt.x, cursorPt.y); |
| |
| Event event = new Event (); |
| event.setBoundsInPixels(new Rectangle(newX, newY, width, height)); |
| sendSelectionEvent (SWT.Selection, event, true); |
| if (isDisposed ()) return LRESULT.ZERO; |
| if (event.doit) { |
| if ((style & SWT.SMOOTH) != 0) { |
| setBoundsInPixels (event.getBoundsInPixels()); |
| } |
| } |
| return result; |
| } |
| return result; |
| } |
| |
| @Override |
| LRESULT WM_GETDLGCODE (long /*int*/ wParam, long /*int*/ lParam) { |
| return new LRESULT (OS.DLGC_STATIC); |
| } |
| |
| @Override |
| LRESULT WM_LBUTTONDOWN (long /*int*/ wParam, long /*int*/ lParam) { |
| LRESULT result = super.WM_LBUTTONDOWN (wParam, lParam); |
| if (result == LRESULT.ZERO) return result; |
| |
| /* Compute the banding rectangle */ |
| long /*int*/ hwndTrack = parent.handle; |
| POINT pt = new POINT (); |
| OS.POINTSTOPOINT (pt, lParam); |
| RECT rect = new RECT (); |
| OS.GetWindowRect (handle, rect); |
| OS.MapWindowPoints (handle, 0, pt, 1); |
| startX = pt.x - rect.left; |
| startY = pt.y - rect.top; |
| OS.MapWindowPoints (0, hwndTrack, rect, 2); |
| lastX = rect.left; |
| lastY = rect.top; |
| int width = rect.right - rect.left; |
| int height = rect.bottom - rect.top; |
| |
| /* The event must be sent because doit flag is used */ |
| Event event = new Event (); |
| event.setBoundsInPixels(new Rectangle(lastX, lastY, width, height)); |
| if ((style & SWT.SMOOTH) == 0) { |
| event.detail = SWT.DRAG; |
| } |
| sendSelectionEvent (SWT.Selection, event, true); |
| if (isDisposed ()) return LRESULT.ZERO; |
| |
| /* Draw the banding rectangle */ |
| Rectangle bounds = event.getBoundsInPixels(); |
| if (event.doit) { |
| dragging = true; |
| lastX = bounds.x; |
| lastY = bounds.y; |
| menuShell ().bringToTop (); |
| if (isDisposed ()) return LRESULT.ZERO; |
| int flags = OS.RDW_UPDATENOW | OS.RDW_ALLCHILDREN; |
| OS.RedrawWindow (hwndTrack, null, 0, flags); |
| drawBand (bounds.x, bounds.y, width, height); |
| if ((style & SWT.SMOOTH) != 0) { |
| setBoundsInPixels (bounds.x, bounds.y, width, height); |
| // widget could be disposed at this point |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| LRESULT WM_LBUTTONUP (long /*int*/ wParam, long /*int*/ lParam) { |
| LRESULT result = super.WM_LBUTTONUP (wParam, lParam); |
| if (result == LRESULT.ZERO) return result; |
| |
| /* Compute the banding rectangle */ |
| if (!dragging) return result; |
| dragging = false; |
| RECT rect = new RECT (); |
| OS.GetWindowRect (handle, rect); |
| int width = rect.right - rect.left; |
| int height = rect.bottom - rect.top; |
| |
| /* The event must be sent because doit flag is used */ |
| Event event = new Event (); |
| event.setBoundsInPixels(new Rectangle(lastX, lastY, width, height)); |
| drawBand (lastX, lastY, width, height); |
| sendSelectionEvent (SWT.Selection, event, true); |
| if (isDisposed ()) return result; |
| Rectangle bounds = event.getBoundsInPixels(); |
| if (event.doit) { |
| if ((style & SWT.SMOOTH) != 0) { |
| setBoundsInPixels (bounds.x, bounds.y, width, height); |
| // widget could be disposed at this point |
| } |
| } |
| return result; |
| } |
| |
| @Override |
| LRESULT WM_MOUSEMOVE (long /*int*/ wParam, long /*int*/ lParam) { |
| LRESULT result = super.WM_MOUSEMOVE (wParam, lParam); |
| if (result != null) return result; |
| if (!dragging || (wParam & OS.MK_LBUTTON) == 0) return result; |
| |
| /* Compute the banding rectangle */ |
| POINT pt = new POINT (); |
| OS.POINTSTOPOINT (pt, lParam); |
| long /*int*/ hwndTrack = parent.handle; |
| OS.MapWindowPoints (handle, hwndTrack, pt, 1); |
| RECT rect = new RECT (), clientRect = new RECT (); |
| OS.GetWindowRect (handle, rect); |
| int width = rect.right - rect.left; |
| int height = rect.bottom - rect.top; |
| OS.GetClientRect (hwndTrack, clientRect); |
| int newX = lastX, newY = lastY; |
| if ((style & SWT.VERTICAL) != 0) { |
| int clientWidth = clientRect.right - clientRect.left; |
| newX = Math.min (Math.max (0, pt.x - startX), clientWidth - width); |
| } else { |
| int clientHeight = clientRect.bottom - clientRect.top; |
| newY = Math.min (Math.max (0, pt.y - startY), clientHeight - height); |
| } |
| if (newX == lastX && newY == lastY) return result; |
| drawBand (lastX, lastY, width, height); |
| |
| /* The event must be sent because doit flag is used */ |
| Event event = new Event (); |
| event.setBoundsInPixels(new Rectangle(newX, newY, width, height)); |
| if ((style & SWT.SMOOTH) == 0) { |
| event.detail = SWT.DRAG; |
| } |
| sendSelectionEvent (SWT.Selection, event, true); |
| if (isDisposed ()) return LRESULT.ZERO; |
| if (event.doit) { |
| Rectangle boundsInPixels = event.getBoundsInPixels(); |
| lastX = boundsInPixels.x; |
| lastY = boundsInPixels.y; |
| } |
| int flags = OS.RDW_UPDATENOW | OS.RDW_ALLCHILDREN; |
| OS.RedrawWindow (hwndTrack, null, 0, flags); |
| drawBand (lastX, lastY, width, height); |
| if ((style & SWT.SMOOTH) != 0) { |
| setBoundsInPixels (lastX, lastY, width, height); |
| // widget could be disposed at this point |
| } |
| return result; |
| } |
| |
| @Override |
| LRESULT WM_SETCURSOR (long /*int*/ wParam, long /*int*/ lParam) { |
| LRESULT result = super.WM_SETCURSOR (wParam, lParam); |
| if (result != null) return result; |
| int hitTest = (short) OS.LOWORD (lParam); |
| if (hitTest == OS.HTCLIENT) { |
| long /*int*/ hCursor = 0; |
| if ((style & SWT.HORIZONTAL) != 0) { |
| hCursor = OS.LoadCursor (0, OS.IDC_SIZENS); |
| } else { |
| hCursor = OS.LoadCursor (0, OS.IDC_SIZEWE); |
| } |
| OS.SetCursor (hCursor); |
| return LRESULT.ONE; |
| } |
| return result; |
| } |
| |
| } |