--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dwt/widgets/Sash.d	Mon Jan 28 04:47:28 2008 +0100
@@ -0,0 +1,427 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2007 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
+ *******************************************************************************/
+module dwt.widgets.Sash;
+
+import dwt.widgets.Control;
+class Sash : Control {
+}
+/++
+import dwt.DWT;
+import dwt.DWTException;
+import dwt.events.SelectionEvent;
+import dwt.events.SelectionListener;
+import dwt.graphics.Point;
+import dwt.internal.win32.LRESULT;
+import dwt.internal.win32.OS;
+import dwt.internal.win32.POINT;
+import dwt.internal.win32.RECT;
+import dwt.internal.win32.TCHAR;
+
+/**
+ * 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 intended to be subclassed <em>only</em>
+ * within the DWT implementation.
+ * </p>
+ */
+public class Sash extends Control {
+    bool 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>DWT</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>DWT</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 DWTException <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 DWT#HORIZONTAL
+ * @see DWT#VERTICAL
+ * @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>DWT.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 DWTException <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 is null) error (DWT.ERROR_NULL_ARGUMENT);
+    TypedListener typedListener = new TypedListener (listener);
+    addListener (DWT.Selection,typedListener);
+    addListener (DWT.DefaultSelection,typedListener);
+}
+
+int callWindowProc (int hwnd, int msg, int wParam, int lParam) {
+    if (handle is 0) return 0;
+    return OS.DefWindowProc (hwnd, msg, wParam, lParam);
+}
+
+void createHandle () {
+    super.createHandle ();
+    state |= THEME_BACKGROUND;
+}
+
+static int checkStyle (int style) {
+    return checkBits (style, DWT.HORIZONTAL, DWT.VERTICAL, 0, 0, 0, 0);
+}
+
+public Point computeSize (int wHint, int hHint, bool changed) {
+    checkWidget ();
+    int border = getBorderWidth ();
+    int width = border * 2, height = border * 2;
+    if ((style & DWT.HORIZONTAL) !is 0) {
+        width += DEFAULT_WIDTH;  height += 3;
+    } else {
+        width += 3; height += DEFAULT_HEIGHT;
+    }
+    if (wHint !is DWT.DEFAULT) width = wHint + (border * 2);
+    if (hHint !is DWT.DEFAULT) height = hHint + (border * 2);
+    return new Point (width, height);
+}
+
+void drawBand (int x, int y, int width, int height) {
+    if ((style & DWT.SMOOTH) !is 0) return;
+    int hwndTrack = parent.handle;
+    byte [] bits = {-86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0, -86, 0, 85, 0};
+    int stippleBitmap = OS.CreateBitmap (8, 8, 1, 1, bits);
+    int stippleBrush = OS.CreatePatternBrush (stippleBitmap);
+    int hDC = OS.GetDCEx (hwndTrack, 0, OS.DCX_CACHE);
+    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 DWTException <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 is null) error (DWT.ERROR_NULL_ARGUMENT);
+    if (eventTable is null) return;
+    eventTable.unhook (DWT.Selection, listener);
+    eventTable.unhook (DWT.DefaultSelection,listener);
+}
+
+TCHAR windowClass () {
+    return display.windowClass;
+}
+
+int windowProc () {
+    return display.windowProc;
+}
+
+LRESULT WM_ERASEBKGND (int wParam, int lParam) {
+    super.WM_ERASEBKGND (wParam, lParam);
+    drawBackground (wParam);
+    return LRESULT.ONE;
+}
+
+LRESULT WM_KEYDOWN (int wParam, int lParam) {
+    LRESULT result = super.WM_KEYDOWN (wParam, lParam);
+    if (result !is null) return result;
+    switch (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;
+            POINT pt = new POINT ();
+            if ((style & DWT.VERTICAL) !is 0) {
+                if (wParam is OS.VK_UP || wParam is OS.VK_DOWN) break;
+                pt.x = wParam is OS.VK_LEFT ? -step : step;
+            } else {
+                if (wParam is OS.VK_LEFT || wParam is OS.VK_RIGHT) break;
+                pt.y = wParam is OS.VK_UP ? -step : step;
+            }
+            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 clientWidth = clientRect.right - clientRect.left;
+            int clientHeight = clientRect.bottom - clientRect.top;
+            int newX = lastX, newY = lastY;
+            if ((style & DWT.VERTICAL) !is 0) {
+                newX = Math.min (Math.max (0, pt.x - startX), clientWidth - width);
+            } else {
+                newY = Math.min (Math.max (0, pt.y - startY), clientHeight - height);
+            }
+            if (newX is lastX && newY is lastY) return result;
+
+            /* Update the pointer position */
+            POINT cursorPt = new POINT ();
+            cursorPt.x = pt.x;  cursorPt.y = pt.y;
+            OS.ClientToScreen (hwndTrack, cursorPt);
+            if ((style & DWT.VERTICAL) !is 0) {
+                cursorPt.y += height / 2;
+            }
+            else {
+                cursorPt.x += width / 2;
+            }
+            OS.SetCursorPos (cursorPt.x, cursorPt.y);
+
+            Event event = new Event ();
+            event.x = newX;
+            event.y = newY;
+            event.width = width;
+            event.height = height;
+            sendEvent (DWT.Selection, event);
+            if (isDisposed ()) return LRESULT.ZERO;
+            if (event.doit) {
+                if ((style & DWT.SMOOTH) !is 0) {
+                    setBounds (event.x, event.y, width, height);
+                }
+            }
+            return result;
+    }
+    return result;
+}
+
+LRESULT WM_GETDLGCODE (int wParam, int lParam) {
+    return new LRESULT (OS.DLGC_STATIC);
+}
+
+LRESULT WM_LBUTTONDOWN (int wParam, int lParam) {
+    LRESULT result = super.WM_LBUTTONDOWN (wParam, lParam);
+    if (result is LRESULT.ZERO) return result;
+
+    /* Compute the banding rectangle */
+    int hwndTrack = parent.handle;
+    POINT pt = new POINT ();
+    pt.x = (short) (lParam & 0xFFFF);
+    pt.y = (short) (lParam >> 16);
+    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.x = lastX;
+    event.y = lastY;
+    event.width = width;
+    event.height = height;
+    if ((style & DWT.SMOOTH) is 0) {
+        event.detail = DWT.DRAG;
+    }
+    sendEvent (DWT.Selection, event);
+    if (isDisposed ()) return LRESULT.ZERO;
+
+    /* Draw the banding rectangle */
+    if (event.doit) {
+        dragging = true;
+        lastX = event.x;
+        lastY = event.y;
+        menuShell ().bringToTop ();
+        if (isDisposed ()) return LRESULT.ZERO;
+        if (OS.IsWinCE) {
+            OS.UpdateWindow (hwndTrack);
+        } else {
+            int flags = OS.RDW_UPDATENOW | OS.RDW_ALLCHILDREN;
+            OS.RedrawWindow (hwndTrack, null, 0, flags);
+        }
+        drawBand (event.x, event.y, width, height);
+        if ((style & DWT.SMOOTH) !is 0) {
+            setBounds (event.x, event.y, width, height);
+            // widget could be disposed at this point
+        }
+    }
+    return result;
+}
+
+LRESULT WM_LBUTTONUP (int wParam, int lParam) {
+    LRESULT result = super.WM_LBUTTONUP (wParam, lParam);
+    if (result is 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.x = lastX;
+    event.y = lastY;
+    event.width = width;
+    event.height = height;
+    drawBand (event.x, event.y, width, height);
+    sendEvent (DWT.Selection, event);
+    if (isDisposed ()) return result;
+    if (event.doit) {
+        if ((style & DWT.SMOOTH) !is 0) {
+            setBounds (event.x, event.y, width, height);
+            // widget could be disposed at this point
+        }
+    }
+    return result;
+}
+
+LRESULT WM_MOUSEMOVE (int wParam, int lParam) {
+    LRESULT result = super.WM_MOUSEMOVE (wParam, lParam);
+    if (result !is null) return result;
+    if (!dragging || (wParam & OS.MK_LBUTTON) is 0) return result;
+
+    /* Compute the banding rectangle */
+    POINT pt = new POINT ();
+    pt.x = (short) (lParam & 0xFFFF);
+    pt.y = (short) (lParam >> 16);
+    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 & DWT.VERTICAL) !is 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 is lastX && newY is lastY) return result;
+    drawBand (lastX, lastY, width, height);
+
+    /* The event must be sent because doit flag is used */
+    Event event = new Event ();
+    event.x = newX;
+    event.y = newY;
+    event.width = width;
+    event.height = height;
+    if ((style & DWT.SMOOTH) is 0) {
+        event.detail = DWT.DRAG;
+    }
+    sendEvent (DWT.Selection, event);
+    if (isDisposed ()) return LRESULT.ZERO;
+    if (event.doit) {
+        lastX = event.x;
+        lastY = event.y;
+    }
+    if (OS.IsWinCE) {
+        OS.UpdateWindow (hwndTrack);
+    } else {
+        int flags = OS.RDW_UPDATENOW | OS.RDW_ALLCHILDREN;
+        OS.RedrawWindow (hwndTrack, null, 0, flags);
+    }
+    drawBand (lastX, lastY, width, height);
+    if ((style & DWT.SMOOTH) !is 0) {
+        setBounds (lastX, lastY, width, height);
+        // widget could be disposed at this point
+    }
+    return result;
+}
+
+LRESULT WM_SETCURSOR (int wParam, int lParam) {
+    LRESULT result = super.WM_SETCURSOR (wParam, lParam);
+    if (result !is null) return result;
+    int hitTest = lParam & 0xFFFF;
+    if (hitTest is OS.HTCLIENT) {
+        int hCursor = 0;
+        if ((style & DWT.HORIZONTAL) !is 0) {
+            hCursor = OS.LoadCursor (0, OS.IDC_SIZENS);
+        } else {
+            hCursor = OS.LoadCursor (0, OS.IDC_SIZEWE);
+        }
+        OS.SetCursor (hCursor);
+        return LRESULT.ONE;
+    }
+    return result;
+}
+
+}
+++/