Mercurial > projects > dwt2
diff org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/widgets/Canvas.d @ 0:6dd524f61e62
add dwt win and basic java stuff
author | Frank Benoit <benoit@tionex.de> |
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date | Mon, 02 Mar 2009 14:44:16 +0100 |
parents | |
children | 9f4c18c268b2 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/org.eclipse.swt.win32.win32.x86/src/org/eclipse/swt/widgets/Canvas.d Mon Mar 02 14:44:16 2009 +0100 @@ -0,0 +1,503 @@ +/******************************************************************************* + * Copyright (c) 2000, 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 + * Port to the D programming language: + * Frank Benoit <benoit@tionex.de> + *******************************************************************************/ +module org.eclipse.swt.widgets.Canvas; + +import org.eclipse.swt.widgets.Composite; + + +import org.eclipse.swt.SWT; +import org.eclipse.swt.SWTException; +import org.eclipse.swt.graphics.Font; +import org.eclipse.swt.graphics.GC; +import org.eclipse.swt.graphics.Rectangle; +import org.eclipse.swt.internal.win32.OS; +import org.eclipse.swt.widgets.Caret; +import org.eclipse.swt.widgets.Control; +import org.eclipse.swt.widgets.Display; +import org.eclipse.swt.widgets.IME; + +import java.lang.all; + +/** + * Instances of this class provide a surface for drawing + * arbitrary graphics. + * <dl> + * <dt><b>Styles:</b></dt> + * <dd>(none)</dd> + * <dt><b>Events:</b></dt> + * <dd>(none)</dd> + * </dl> + * <p> + * This class may be subclassed by custom control implementors + * who are building controls that are <em>not</em> constructed + * from aggregates of other controls. That is, they are either + * painted using SWT graphics calls or are handled by native + * methods. + * </p> + * + * @see Composite + * @see <a href="http://www.eclipse.org/swt/snippets/#canvas">Canvas 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> + */ + +public class Canvas : Composite { + + alias Composite.drawBackground drawBackground; + alias Composite.windowProc windowProc; + + Caret caret; + IME ime; + +/** + * Prevents uninitialized instances from being created outside the package. + */ +this () { +} + +/** + * 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> + * </ul> + * + * @see SWT + * @see Widget#checkSubclass + * @see Widget#getStyle + */ +public this (Composite parent, int style) { + super (parent, style); +} + +void clearArea (int x, int y, int width, int height) { + checkWidget (); + if (OS.IsWindowVisible (handle)) { + RECT rect; + OS.SetRect (&rect, x, y, x + width, y + height); + auto hDC = OS.GetDCEx (handle, null, OS.DCX_CACHE | OS.DCX_CLIPCHILDREN | OS.DCX_CLIPSIBLINGS); + drawBackground (hDC, &rect); + OS.ReleaseDC (handle, hDC); + } +} + +/** + * Fills the interior of the rectangle specified by the arguments, + * with the receiver's background. + * + * @param gc the gc where the rectangle is to be filled + * @param x the x coordinate of the rectangle to be filled + * @param y the y coordinate of the rectangle to be filled + * @param width the width of the rectangle to be filled + * @param height the height of the rectangle to be filled + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_NULL_ARGUMENT - if the gc is null</li> + * <li>ERROR_INVALID_ARGUMENT - if the gc has been disposed</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> + * + * @since 3.2 + */ +public void drawBackground (GC gc, int x, int y, int width, int height) { + checkWidget (); + if (gc is null) error (SWT.ERROR_NULL_ARGUMENT); + if (gc.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); + RECT rect; + OS.SetRect (&rect, x, y, x + width, y + height); + auto hDC = gc.handle; + int pixel = background is -1 ? gc.getBackground ().handle : -1; + drawBackground (hDC, &rect, pixel); +} + +/** + * Returns the caret. + * <p> + * The caret for the control is automatically hidden + * and shown when the control is painted or resized, + * when focus is gained or lost and when an the control + * is scrolled. To avoid drawing on top of the caret, + * the programmer must hide and show the caret when + * drawing in the window any other time. + * </p> + * + * @return the caret for the receiver, may be 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 Caret getCaret () { + checkWidget (); + return caret; +} + +/** + * Returns the IME. + * + * @return the IME + * + * @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 IME getIME () { + checkWidget (); + return ime; +} + +void releaseChildren (bool destroy) { + if (caret !is null) { + caret.release (false); + caret = null; + } + if (ime !is null) { + ime.release (false); + ime = null; + } + super.releaseChildren (destroy); +} + +/** + * Scrolls a rectangular area of the receiver by first copying + * the source area to the destination and then causing the area + * of the source which is not covered by the destination to + * be repainted. Children that intersect the rectangle are + * optionally moved during the operation. In addition, outstanding + * paint events are flushed before the source area is copied to + * ensure that the contents of the canvas are drawn correctly. + * + * @param destX the x coordinate of the destination + * @param destY the y coordinate of the destination + * @param x the x coordinate of the source + * @param y the y coordinate of the source + * @param width the width of the area + * @param height the height of the area + * @param all <code>true</code>if children should be scrolled, and <code>false</code> otherwise + * + * @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 scroll (int destX, int destY, int x, int y, int width, int height, bool all) { + checkWidget (); + forceResize (); + bool isFocus = caret !is null && caret.isFocusCaret (); + if (isFocus) caret.killFocus (); + RECT sourceRect; + OS.SetRect (&sourceRect, x, y, x + width, y + height); + RECT clientRect; + OS.GetClientRect (handle, &clientRect); + if (OS.IntersectRect (&clientRect, &sourceRect, &clientRect)) { + static if (OS.IsWinCE) { + OS.UpdateWindow (handle); + } else { + int flags = OS.RDW_UPDATENOW | OS.RDW_ALLCHILDREN; + OS.RedrawWindow (handle, null, null, flags); + } + } + int deltaX = destX - x, deltaY = destY - y; + if (findImageControl () !is null) { + static if (OS.IsWinCE) { + OS.InvalidateRect (handle, &sourceRect, true); + } else { + { // scope for flags + int flags = OS.RDW_ERASE | OS.RDW_FRAME | OS.RDW_INVALIDATE; + if (all) flags |= OS.RDW_ALLCHILDREN; + OS.RedrawWindow (handle, &sourceRect, null, flags); + } + } + OS.OffsetRect (&sourceRect, deltaX, deltaY); + static if (OS.IsWinCE) { + OS.InvalidateRect (handle, &sourceRect, true); + } else { + int flags = OS.RDW_ERASE | OS.RDW_FRAME | OS.RDW_INVALIDATE; + if (all) flags |= OS.RDW_ALLCHILDREN; + OS.RedrawWindow (handle, &sourceRect, null, flags); + } + } else { + int flags = OS.SW_INVALIDATE | OS.SW_ERASE; + /* + * Feature in Windows. If any child in the widget tree partially + * intersects the scrolling rectangle, Windows moves the child + * and copies the bits that intersect the scrolling rectangle but + * does not redraw the child. + * + * Feature in Windows. When any child in the widget tree does not + * intersect the scrolling rectangle but the parent does intersect, + * Windows does not move the child. This is the documented (but + * strange) Windows behavior. + * + * The fix is to not use SW_SCROLLCHILDREN and move the children + * explicitly after scrolling. + */ +// if (all) flags |= OS.SW_SCROLLCHILDREN; + OS.ScrollWindowEx (handle, deltaX, deltaY, &sourceRect, null, null, null, flags); + } + if (all) { + Control [] children = _getChildren (); + for (int i=0; i<children.length; i++) { + Control child = children [i]; + Rectangle rect = child.getBounds (); + if (Math.min (x + width, rect.x + rect.width) >= Math.max (x, rect.x) && + Math.min (y + height, rect.y + rect.height) >= Math.max (y, rect.y)) { + child.setLocation (rect.x + deltaX, rect.y + deltaY); + } + } + } + if (isFocus) caret.setFocus (); +} + +/** + * Sets the receiver's caret. + * <p> + * The caret for the control is automatically hidden + * and shown when the control is painted or resized, + * when focus is gained or lost and when an the control + * is scrolled. To avoid drawing on top of the caret, + * the programmer must hide and show the caret when + * drawing in the window any other time. + * </p> + * @param caret the new caret for the receiver, may be null + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_INVALID_ARGUMENT - if the caret has been disposed</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 setCaret (Caret caret) { + checkWidget (); + Caret newCaret = caret; + Caret oldCaret = this.caret; + this.caret = newCaret; + if (hasFocus ()) { + if (oldCaret !is null) oldCaret.killFocus (); + if (newCaret !is null) { + if (newCaret.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT); + newCaret.setFocus (); + } + } +} + +override public void setFont (Font font) { + checkWidget (); + if (caret !is null) caret.setFont (font); + super.setFont (font); +} + +/** + * Sets the receiver's IME. + * + * @param ime the new IME for the receiver, may be null + * + * @exception IllegalArgumentException <ul> + * <li>ERROR_INVALID_ARGUMENT - if the IME has been disposed</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> + * + * @since 3.4 + */ +public void setIME (IME ime) { + checkWidget (); + if (ime !is null && ime.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT); + this.ime = ime; +} + +override int windowProc (HWND hwnd, int msg, int wParam, int lParam) { + if (msg is Display.SWT_RESTORECARET) { + if ((state & CANVAS) !is 0) { + if (caret !is null) { + caret.killFocus (); + caret.setFocus (); + return 1; + } + } + } + return super.windowProc (hwnd, msg, wParam, lParam); +} + +override LRESULT WM_CHAR (int wParam, int lParam) { + LRESULT result = super.WM_CHAR (wParam, lParam); + if (result !is null) return result; + if (caret !is null) { + switch (wParam) { + case SWT.DEL: + case SWT.BS: + case SWT.ESC: + break; + default: { + if (OS.GetKeyState (OS.VK_CONTROL) >= 0) { + int value; + if (OS.SystemParametersInfo (OS.SPI_GETMOUSEVANISH, 0, &value, 0)) { + if (value !is 0) OS.SetCursor (null); + } + } + } + } + } + return result; +} + +override LRESULT WM_IME_COMPOSITION (int /*long*/ wParam, int /*long*/ lParam) { + if (ime !is null) { + LRESULT result = ime.WM_IME_COMPOSITION (wParam, lParam); + if (result !is null) return result; + } + + /* + * Bug in Windows. On Korean Windows XP, the IME window + * for the Korean Input System (MS-IME 2002) always opens + * in the top left corner of the screen, despite the fact + * that ImmSetCompositionWindow() was called to position + * the IME when focus is gained. The fix is to position + * the IME on every WM_IME_COMPOSITION message. + */ + if (!OS.IsWinCE && OS.WIN32_VERSION is OS.VERSION (5, 1)) { + if (OS.IsDBLocale) { + short langID = OS.GetSystemDefaultUILanguage (); + short primaryLang = OS.PRIMARYLANGID (langID); + if (primaryLang is OS.LANG_KOREAN) { + if (caret !is null && caret.isFocusCaret ()) { + POINT ptCurrentPos; + if (OS.GetCaretPos (&ptCurrentPos)) { + COMPOSITIONFORM lpCompForm; + lpCompForm.dwStyle = OS.CFS_POINT; + lpCompForm.ptCurrentPos.x = ptCurrentPos.x; + lpCompForm.ptCurrentPos.y = ptCurrentPos.y; + auto hIMC = OS.ImmGetContext (handle); + OS.ImmSetCompositionWindow (hIMC, &lpCompForm); + OS.ImmReleaseContext (handle, hIMC); + } + } + } + } + } + return super.WM_IME_COMPOSITION (wParam, lParam); +} + +override LRESULT WM_IME_COMPOSITION_START (int /*long*/ wParam, int /*long*/ lParam) { + if (ime !is null) { + LRESULT result = ime.WM_IME_COMPOSITION_START (wParam, lParam); + if (result !is null) return result; + } + return super.WM_IME_COMPOSITION_START (wParam, lParam); +} + +override LRESULT WM_IME_ENDCOMPOSITION (int /*long*/ wParam, int /*long*/ lParam) { + if (ime !is null) { + LRESULT result = ime.WM_IME_ENDCOMPOSITION (wParam, lParam); + if (result !is null) return result; + } + return super.WM_IME_ENDCOMPOSITION (wParam, lParam); +} + +override LRESULT WM_INPUTLANGCHANGE (int wParam, int lParam) { + LRESULT result = super.WM_INPUTLANGCHANGE (wParam, lParam); + if (caret !is null && caret.isFocusCaret ()) { + caret.setIMEFont (); + caret.resizeIME (); + } + return result; +} + +override LRESULT WM_KILLFOCUS (int wParam, int lParam) { + if (ime !is null) { + LRESULT result = ime.WM_KILLFOCUS (wParam, lParam); + if (result !is null) return result; + } + LRESULT result = super.WM_KILLFOCUS (wParam, lParam); + if (caret !is null) caret.killFocus (); + return result; +} + +override LRESULT WM_LBUTTONDOWN (int /*long*/ wParam, int /*long*/ lParam) { + if (ime !is null) { + LRESULT result = ime.WM_LBUTTONDOWN (wParam, lParam); + if (result !is null) return result; + } + return super.WM_LBUTTONDOWN (wParam, lParam); +} + +override LRESULT WM_SETFOCUS (int wParam, int lParam) { + LRESULT result = super.WM_SETFOCUS (wParam, lParam); + if (caret !is null) caret.setFocus (); + return result; +} + +override LRESULT WM_SIZE (int wParam, int lParam) { + LRESULT result = super.WM_SIZE (wParam, lParam); + if (caret !is null && caret.isFocusCaret ()) caret.resizeIME (); + return result; +} + +override LRESULT WM_WINDOWPOSCHANGED (int wParam, int lParam) { + LRESULT result = super.WM_WINDOWPOSCHANGED (wParam, lParam); + //if (result !is null) return result; + /* + * Bug in Windows. When a window with style WS_EX_LAYOUTRTL + * that contains a caret is resized, Windows does not move the + * caret in relation to the mirrored origin in the top right. + * The fix is to hide the caret in WM_WINDOWPOSCHANGING and + * show the caret in WM_WINDOWPOSCHANGED. + */ + bool isFocus = (style & SWT.RIGHT_TO_LEFT) !is 0 && caret !is null && caret.isFocusCaret (); + if (isFocus) caret.setFocus (); + return result; +} + +override LRESULT WM_WINDOWPOSCHANGING (int wParam, int lParam) { + LRESULT result = super.WM_WINDOWPOSCHANGING (wParam, lParam); + if (result !is null) return result; + /* + * Bug in Windows. When a window with style WS_EX_LAYOUTRTL + * that contains a caret is resized, Windows does not move the + * caret in relation to the mirrored origin in the top right. + * The fix is to hide the caret in WM_WINDOWPOSCHANGING and + * show the caret in WM_WINDOWPOSCHANGED. + */ + bool isFocus = (style & SWT.RIGHT_TO_LEFT) !is 0 && caret !is null && caret.isFocusCaret (); + if (isFocus) caret.killFocus (); + return result; +} + +}