diff options
Diffstat (limited to 'bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TableDragSourceEffect.java')
-rw-r--r-- | bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TableDragSourceEffect.java | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TableDragSourceEffect.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TableDragSourceEffect.java new file mode 100644 index 0000000000..bc25bd33ae --- /dev/null +++ b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/win32/org/eclipse/swt/dnd/TableDragSourceEffect.java @@ -0,0 +1,199 @@ +/******************************************************************************* + * Copyright (c) 2007, 2008 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.dnd; + +import org.eclipse.swt.*; +import org.eclipse.swt.graphics.*; +import org.eclipse.swt.internal.win32.*; +import org.eclipse.swt.widgets.*; + +/** + * This class provides default implementations to display a source image + * when a drag is initiated from a <code>Table</code>. + * + * <p>Classes that wish to provide their own source image for a <code>Table</code> can + * extend the <code>TableDragSourceEffect</code> class, override the + * <code>TableDragSourceEffect.dragStart</code> method and set the field + * <code>DragSourceEvent.image</code> with their own image.</p> + * + * Subclasses that override any methods of this class must call the corresponding + * <code>super</code> method to get the default drag source effect implementation. + * + * @see DragSourceEffect + * @see DragSourceEvent + * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> + * + * @since 3.3 + */ +public class TableDragSourceEffect extends DragSourceEffect { + Image dragSourceImage = null; + + /** + * Creates a new <code>TableDragSourceEffect</code> to handle drag effect + * from the specified <code>Table</code>. + * + * @param table the <code>Table</code> that the user clicks on to initiate the drag + */ + public TableDragSourceEffect(Table table) { + super(table); + } + + /** + * This implementation of <code>dragFinished</code> disposes the image + * that was created in <code>TableDragSourceEffect.dragStart</code>. + * + * Subclasses that override this method should call <code>super.dragFinished(event)</code> + * to dispose the image in the default implementation. + * + * @param event the information associated with the drag finished event + */ + public void dragFinished(DragSourceEvent event) { + if (dragSourceImage != null) dragSourceImage.dispose(); + dragSourceImage = null; + } + + /** + * This implementation of <code>dragStart</code> will create a default + * image that will be used during the drag. The image should be disposed + * when the drag is completed in the <code>TableDragSourceEffect.dragFinished</code> + * method. + * + * Subclasses that override this method should call <code>super.dragStart(event)</code> + * to use the image from the default implementation. + * + * @param event the information associated with the drag start event + */ + public void dragStart(DragSourceEvent event) { + event.image = getDragSourceImage(event); + } + + Image getDragSourceImage(DragSourceEvent event) { + if (dragSourceImage != null) dragSourceImage.dispose(); + dragSourceImage = null; + if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION (5, 1)) { + SHDRAGIMAGE shdi = new SHDRAGIMAGE(); + int DI_GETDRAGIMAGE = OS.RegisterWindowMessage (new TCHAR (0, "ShellGetDragImage", true)); //$NON-NLS-1$ + if (OS.SendMessage (control.handle, DI_GETDRAGIMAGE, 0, shdi) != 0) { + if ((control.getStyle() & SWT.MIRRORED) != 0) { + event.offsetX = shdi.sizeDragImage.cx - shdi.ptOffset.x; + } else { + event.offsetX = shdi.ptOffset.x; + } + event.offsetY = shdi.ptOffset.y; + int /*long*/ hImage = shdi.hbmpDragImage; + if (hImage != 0) { + BITMAP bm = new BITMAP (); + OS.GetObject (hImage, BITMAP.sizeof, bm); + int srcWidth = bm.bmWidth; + int srcHeight = bm.bmHeight; + + /* Create resources */ + int /*long*/ hdc = OS.GetDC (0); + int /*long*/ srcHdc = OS.CreateCompatibleDC (hdc); + int /*long*/ oldSrcBitmap = OS.SelectObject (srcHdc, hImage); + int /*long*/ memHdc = OS.CreateCompatibleDC (hdc); + BITMAPINFOHEADER bmiHeader = new BITMAPINFOHEADER (); + bmiHeader.biSize = BITMAPINFOHEADER.sizeof; + bmiHeader.biWidth = srcWidth; + bmiHeader.biHeight = -srcHeight; + bmiHeader.biPlanes = 1; + bmiHeader.biBitCount = 32; + bmiHeader.biCompression = OS.BI_RGB; + byte [] bmi = new byte[BITMAPINFOHEADER.sizeof]; + OS.MoveMemory (bmi, bmiHeader, BITMAPINFOHEADER.sizeof); + int /*long*/ [] pBits = new int /*long*/ [1]; + int /*long*/ memDib = OS.CreateDIBSection (0, bmi, OS.DIB_RGB_COLORS, pBits, 0, 0); + if (memDib == 0) SWT.error (SWT.ERROR_NO_HANDLES); + int /*long*/ oldMemBitmap = OS.SelectObject (memHdc, memDib); + + BITMAP dibBM = new BITMAP (); + OS.GetObject (memDib, BITMAP.sizeof, dibBM); + int sizeInBytes = dibBM.bmWidthBytes * dibBM.bmHeight; + + /* Get the foreground pixels */ + OS.BitBlt (memHdc, 0, 0, srcWidth, srcHeight, srcHdc, 0, 0, OS.SRCCOPY); + byte[] srcData = new byte [sizeInBytes]; + OS.MoveMemory (srcData, dibBM.bmBits, sizeInBytes); + + PaletteData palette = new PaletteData(0xFF00, 0xFF0000, 0xFF000000); + ImageData data = new ImageData(srcWidth, srcHeight, bm.bmBitsPixel, palette, bm.bmWidthBytes, srcData); + if (shdi.crColorKey == -1) { + byte[] alphaData = new byte[srcWidth * srcHeight]; + int spinc = dibBM.bmWidthBytes - srcWidth * 4; + int ap = 0, sp = 3; + for (int y = 0; y < srcHeight; ++y) { + for (int x = 0; x < srcWidth; ++x) { + alphaData [ap++] = srcData [sp]; + sp += 4; + } + sp += spinc; + } + data.alphaData = alphaData; + } else { + data.transparentPixel = shdi.crColorKey << 8; + } + dragSourceImage = new Image(control.getDisplay(), data); + OS.SelectObject (memHdc, oldMemBitmap); + OS.DeleteDC (memHdc); + OS.DeleteObject (memDib); + OS.SelectObject (srcHdc, oldSrcBitmap); + OS.DeleteDC (srcHdc); + OS.ReleaseDC (0, hdc); + OS.DeleteObject (hImage); + return dragSourceImage; + } + } + return null; + } + Table table = (Table) control; + //TEMPORARY CODE + if (table.isListening (SWT.EraseItem) || table.isListening (SWT.PaintItem)) return null; + TableItem[] selection = table.getSelection(); + if (selection.length == 0) return null; + int /*long*/ tableImageList = OS.SendMessage (table.handle, OS.LVM_GETIMAGELIST, OS.LVSIL_SMALL, 0); + if (tableImageList != 0) { + int count = Math.min(selection.length, 10); + Rectangle bounds = selection[0].getBounds(0); + for (int i = 1; i < count; i++) { + bounds = bounds.union(selection[i].getBounds(0)); + } + int /*long*/ hDC = OS.GetDC(0); + int /*long*/ hDC1 = OS.CreateCompatibleDC(hDC); + if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION(4, 10)) { + if ((table.getStyle() & SWT.RIGHT_TO_LEFT) != 0) { + OS.SetLayout(hDC1, OS.LAYOUT_RTL | OS.LAYOUT_BITMAPORIENTATIONPRESERVED); + } + } + int /*long*/ bitmap = OS.CreateCompatibleBitmap(hDC, bounds.width, bounds.height); + int /*long*/ hOldBitmap = OS.SelectObject(hDC1, bitmap); + RECT rect = new RECT(); + rect.right = bounds.width; + rect.bottom = bounds.height; + int /*long*/ hBrush = OS.GetStockObject(OS.WHITE_BRUSH); + OS.FillRect(hDC1, rect, hBrush); + for (int i = 0; i < count; i++) { + TableItem selected = selection[i]; + Rectangle cell = selected.getBounds(0); + POINT pt = new POINT(); + int /*long*/ imageList = OS.SendMessage (table.handle, OS.LVM_CREATEDRAGIMAGE, table.indexOf(selected), pt); + OS.ImageList_Draw(imageList, 0, hDC1, cell.x - bounds.x, cell.y - bounds.y, OS.ILD_SELECTED); + OS.ImageList_Destroy(imageList); + } + OS.SelectObject(hDC1, hOldBitmap); + OS.DeleteDC (hDC1); + OS.ReleaseDC (0, hDC); + Display display = table.getDisplay(); + dragSourceImage = Image.win32_new(display, SWT.BITMAP, bitmap); + return dragSourceImage; + } + return null; + } +} |