Mercurial > projects > dwt-mac
view dwt/widgets/Canvas.d @ 150:1ec7c20355bd
Fixes #38
author | Jacob Carlborg <doob@me.com> |
---|---|
date | Wed, 10 Jun 2009 20:51:17 +0200 |
parents | c74ba20de292 |
children |
line wrap: on
line source
/******************************************************************************* * 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: * Jacob Carlborg <doob@me.com> *******************************************************************************/ module dwt.widgets.Canvas; import dwt.DWT; import dwt.DWTException; import dwt.graphics.Font; import dwt.graphics.GC; import dwt.graphics.Image; import dwt.graphics.Rectangle; import dwt.internal.cocoa.NSBezierPath; import dwt.internal.cocoa.NSColor; import dwt.internal.cocoa.NSCursor; import dwt.internal.cocoa.NSEvent; import dwt.internal.cocoa.NSGraphicsContext; import dwt.internal.cocoa.NSPoint; import dwt.internal.cocoa.NSRange; import dwt.internal.cocoa.NSRect; import dwt.internal.cocoa.NSSize; import dwt.internal.cocoa.OS; import dwt.dwthelper.utils; import dwt.internal.objc.cocoa.Cocoa; import objc = dwt.internal.objc.runtime; import dwt.widgets.Caret; import dwt.widgets.Composite; import dwt.widgets.Control; import dwt.widgets.IME; /** * 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 DWT 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">DWT Example: ControlExample</a> * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> */ public class Canvas : Composite { Caret caret; IME ime; this () { /* Do nothing */ } objc.id attributedSubstringFromRange (objc.id id, objc.SEL sel, objc.id range) { if (ime !is null) return ime.attributedSubstringFromRange (id, sel, range); return super.attributedSubstringFromRange(id, sel, range); } bool becomeFirstResponder (objc.id id, objc.SEL sel) { if (caret !is null) caret.setFocus (); return super.becomeFirstResponder(id, sel); } bool resignFirstResponder (objc.id id, objc.SEL sel) { if (caret !is null) caret.killFocus (); return super.resignFirstResponder(id, sel); } /** * 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> * </ul> * * @see DWT * @see Widget#checkSubclass * @see Widget#getStyle */ public this (Composite parent, int style) { super (parent, style); } NSInteger characterIndexForPoint (objc.id id, objc.SEL sel, objc.id point) { if (ime !is null) return ime.characterIndexForPoint (id, sel, point); return super.characterIndexForPoint (id, sel, point); } /** * 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 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> * * @since 3.2 */ public void drawBackground (GC gc, int x, int y, int width, int height) { checkWidget (); if (gc is null) error (DWT.ERROR_NULL_ARGUMENT); if (gc.isDisposed ()) error (DWT.ERROR_INVALID_ARGUMENT); Control control = findBackgroundControl (); if (control !is null) { NSRect rect = NSRect(); rect.x = x; rect.y = y; rect.width = width; rect.height = height; control.fillBackground (view, gc.handle, rect); } else { gc.fillRectangle (x, y, width, height); } } void drawWidget (objc.id id, NSRect rect) { super.drawWidget (id, rect); if (caret is null) return; if (caret.isShowing) { NSGraphicsContext context = NSGraphicsContext.currentContext(); Image image = caret.image; if (image !is null) { NSRect fromRect = NSRect (); NSSize size = image.handle.size(); fromRect.width = size.width; fromRect.height = size.height; NSPoint point = NSPoint(); point.x = caret.x; point.y = caret.y; image.handle.drawAtPoint(point, rect, OS.NSCompositeXOR, 1); } else { context.saveGraphicsState(); context.setCompositingOperation(OS.NSCompositeXOR); NSRect drawRect = NSRect(); drawRect.x = caret.x; drawRect.y = caret.y; drawRect.width = caret.width !is 0 ? caret.width : Caret.DEFAULT_WIDTH; drawRect.height = caret.height; context.setShouldAntialias(false); NSColor color = NSColor.colorWithDeviceRed(1, 1, 1, 1); color.set(); NSBezierPath.fillRect(drawRect); context.restoreGraphicsState(); } } } NSRect firstRectForCharacterRange (objc.id id, objc.SEL sel, objc.id range) { if (ime !is null) return ime.firstRectForCharacterRange (id, sel, range); return super.firstRectForCharacterRange (id, sel, range); } /** * 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 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> */ public Caret getCaret () { checkWidget(); return caret; } /** * Returns the IME. * * @return the IME * * @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> * * @since 3.4 */ public IME getIME () { checkWidget(); return ime; } bool hasMarkedText (objc.id id, objc.SEL sel) { if (ime !is null) return ime.hasMarkedText (id, sel); return super.hasMarkedText (id, sel); } bool insertText (objc.id id, objc.SEL sel, objc.id string) { if (ime !is null) { if (!ime.insertText (id, sel, string)) return false; } return super.insertText (id, sel, string); } NSRange markedRange (objc.id id, objc.SEL sel) { if (ime !is null) return ime.markedRange (id, sel); return super.markedRange (id, sel); } //void redrawWidget (int control, bool children) { // bool isFocus = OS.VERSION < 0x1040 && caret !is null && caret.isFocusCaret (); // if (isFocus) caret.killFocus (); // super.redrawWidget (control, children); // if (isFocus) caret.setFocus (); //} // //void redrawWidget (int control, int x, int y, int width, int height, bool all) { // bool isFocus = OS.VERSION < 0x1040 && caret !is null && caret.isFocusCaret (); // if (isFocus) caret.killFocus (); // super.redrawWidget (control, x, y, width, height, all); // if (isFocus) caret.setFocus (); //} 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 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> */ public void scroll (int destX, int destY, int x, int y, int width, int height, bool all) { checkWidget(); if (width <= 0 || height <= 0) return; int deltaX = destX - x, deltaY = destY - y; if (deltaX is 0 && deltaY is 0) return; // if (!isDrawing (handle)) return; bool isFocus = caret !is null && caret.isFocusCaret (); if (isFocus) caret.killFocus (); Rectangle clientRect = getClientArea (); Rectangle sourceRect = new Rectangle (x, y, width, height); if (sourceRect.intersects (clientRect)) { update (all); } NSRect damage = NSRect(); damage.x = x; damage.y = y; damage.width = width; damage.height = height; view.setNeedsDisplayInRect(damage); damage.x = destX; damage.y = destY; view.setNeedsDisplayInRect(damage); // Control control = findBackgroundControl (); // if ((control !is null && control.backgroundImage !is null)) { // redrawWidget (handle, x, y, width, height, false); // redrawWidget (handle, destX, destY, width, height, false); // } else { // GC gc = new GC (this); // gc.copyArea (x, y, width, height, destX, destY); // gc.dispose (); // } 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 (); } NSRange selectedRange (objc.id id, objc.SEL sel) { if (ime !is null) return ime.selectedRange (id, sel); return super.selectedRange (id, sel); } bool sendKeyEvent (NSEvent nsEvent, int type) { if (caret !is null) NSCursor.setHiddenUntilMouseMoves (true); return super.sendKeyEvent (nsEvent, type); } /** * 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 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> */ 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(DWT.ERROR_INVALID_ARGUMENT); newCaret.setFocus (); } } } 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 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> * * @since 3.4 */ public void setIME (IME ime) { checkWidget (); if (ime !is null && ime.isDisposed()) error(DWT.ERROR_INVALID_ARGUMENT); this.ime = ime; } bool setMarkedText_selectedRange (objc.id id, objc.SEL sel, objc.id string, objc.id range) { if (ime !is null) { if (!ime.setMarkedText_selectedRange (id, sel, string, range)) return false; } return super.setMarkedText_selectedRange (id, sel, string, range); } objc.id validAttributesForMarkedText (objc.id id, objc.SEL sel) { if (ime !is null) return ime.validAttributesForMarkedText (id, sel); return super.validAttributesForMarkedText(id, sel); } }