Mercurial > projects > dwt-samples
view examples/controlexample/CanvasTab.d @ 80:8a1930f94cbb
fix package renaming
author | Frank Benoit <benoit@tionex.de> |
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date | Sun, 11 May 2008 21:03:41 +0200 |
parents | 4a04b6759f98 |
children | eb84f9418bbf |
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/******************************************************************************* * 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 * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module examples.controlexample.CanvasTab; import dwt.DWT; import dwt.events.ControlAdapter; import dwt.events.ControlEvent; import dwt.events.PaintEvent; import dwt.events.PaintListener; import dwt.events.SelectionAdapter; import dwt.events.SelectionEvent; import dwt.graphics.Color; import dwt.graphics.Font; import dwt.graphics.GC; import dwt.graphics.Point; import dwt.graphics.Rectangle; import dwt.layout.GridData; import dwt.layout.GridLayout; import dwt.widgets.Button; import dwt.widgets.Canvas; import dwt.widgets.Caret; import dwt.widgets.Composite; import dwt.widgets.Group; import dwt.widgets.ScrollBar; import dwt.widgets.TabFolder; import dwt.widgets.Widget; import examples.controlexample.Tab; import examples.controlexample.ControlExample; class CanvasTab : Tab { static const int colors [] = [ DWT.COLOR_RED, DWT.COLOR_GREEN, DWT.COLOR_BLUE, DWT.COLOR_MAGENTA, DWT.COLOR_YELLOW, DWT.COLOR_CYAN, DWT.COLOR_DARK_RED, DWT.COLOR_DARK_GREEN, DWT.COLOR_DARK_BLUE, DWT.COLOR_DARK_MAGENTA, DWT.COLOR_DARK_YELLOW, DWT.COLOR_DARK_CYAN ]; static final char[] canvasString = "Canvas"; //$NON-NLS-1$ /* Example widgets and groups that contain them */ Canvas canvas; Group canvasGroup; /* Style widgets added to the "Style" group */ Button horizontalButton, verticalButton, noBackgroundButton, noFocusButton, noMergePaintsButton, noRedrawResizeButton, doubleBufferedButton; /* Other widgets added to the "Other" group */ Button caretButton, fillDamageButton; int paintCount; int cx, cy; int maxX, maxY; /** * Creates the Tab within a given instance of ControlExample. */ this(ControlExample instance) { super(instance); } /** * Creates the "Other" group. */ void createOtherGroup () { super.createOtherGroup (); /* Create display controls specific to this example */ caretButton = new Button (otherGroup, DWT.CHECK); caretButton.setText (ControlExample.getResourceString("Caret")); fillDamageButton = new Button (otherGroup, DWT.CHECK); fillDamageButton.setText (ControlExample.getResourceString("FillDamage")); /* Add the listeners */ caretButton.addSelectionListener (new class() SelectionAdapter { public void widgetSelected (SelectionEvent event) { setCaret (); } }); } /** * Creates the "Example" group. */ void createExampleGroup () { super.createExampleGroup (); /* Create a group for the canvas widget */ canvasGroup = new Group (exampleGroup, DWT.NONE); canvasGroup.setLayout (new GridLayout ()); canvasGroup.setLayoutData (new GridData (DWT.FILL, DWT.FILL, true, true)); canvasGroup.setText ("Canvas"); } /** * Creates the "Example" widgets. */ void createExampleWidgets () { /* Compute the widget style */ int style = getDefaultStyle(); if (horizontalButton.getSelection ()) style |= DWT.H_SCROLL; if (verticalButton.getSelection ()) style |= DWT.V_SCROLL; if (borderButton.getSelection ()) style |= DWT.BORDER; if (noBackgroundButton.getSelection ()) style |= DWT.NO_BACKGROUND; if (noFocusButton.getSelection ()) style |= DWT.NO_FOCUS; if (noMergePaintsButton.getSelection ()) style |= DWT.NO_MERGE_PAINTS; if (noRedrawResizeButton.getSelection ()) style |= DWT.NO_REDRAW_RESIZE; if (doubleBufferedButton.getSelection ()) style |= DWT.DOUBLE_BUFFERED; /* Create the example widgets */ paintCount = 0; cx = 0; cy = 0; canvas = new Canvas (canvasGroup, style); canvas.addPaintListener(new class() PaintListener { public void paintControl(PaintEvent e) { paintCount++; GC gc = e.gc; if (fillDamageButton.getSelection ()) { Color color = e.display.getSystemColor (colors [paintCount % colors.length]); gc.setBackground(color); gc.fillRectangle(e.x, e.y, e.width, e.height); } Point size = canvas.getSize (); gc.drawArc(cx + 1, cy + 1, size.x - 2, size.y - 2, 0, 360); gc.drawRectangle(cx + (size.x - 10) / 2, cy + (size.y - 10) / 2, 10, 10); Point extent = gc.textExtent(canvasString); gc.drawString(canvasString, cx + (size.x - extent.x) / 2, cy - extent.y + (size.y - 10) / 2, true); } }); canvas.addControlListener(new class() ControlAdapter { public void controlResized(ControlEvent event) { Point size = canvas.getSize (); maxX = size.x * 3 / 2; maxY = size.y * 3 / 2; resizeScrollBars (); } }); ScrollBar bar = canvas.getHorizontalBar(); if (bar !is null) { hookListeners (bar); bar.addSelectionListener(new class() SelectionAdapter { public void widgetSelected(SelectionEvent event) { scrollHorizontal (cast(ScrollBar)event.widget); } }); } bar = canvas.getVerticalBar(); if (bar !is null) { hookListeners (bar); bar.addSelectionListener(new class() SelectionAdapter { public void widgetSelected(SelectionEvent event) { scrollVertical (cast(ScrollBar)event.widget); } }); } } /** * Creates the "Style" group. */ void createStyleGroup() { super.createStyleGroup(); /* Create the extra widgets */ horizontalButton = new Button (styleGroup, DWT.CHECK); horizontalButton.setText ("DWT.H_SCROLL"); horizontalButton.setSelection(true); verticalButton = new Button (styleGroup, DWT.CHECK); verticalButton.setText ("DWT.V_SCROLL"); verticalButton.setSelection(true); borderButton = new Button (styleGroup, DWT.CHECK); borderButton.setText ("DWT.BORDER"); noBackgroundButton = new Button (styleGroup, DWT.CHECK); noBackgroundButton.setText ("DWT.NO_BACKGROUND"); noFocusButton = new Button (styleGroup, DWT.CHECK); noFocusButton.setText ("DWT.NO_FOCUS"); noMergePaintsButton = new Button (styleGroup, DWT.CHECK); noMergePaintsButton.setText ("DWT.NO_MERGE_PAINTS"); noRedrawResizeButton = new Button (styleGroup, DWT.CHECK); noRedrawResizeButton.setText ("DWT.NO_REDRAW_RESIZE"); doubleBufferedButton = new Button (styleGroup, DWT.CHECK); doubleBufferedButton.setText ("DWT.DOUBLE_BUFFERED"); } /** * Creates the tab folder page. * * @param tabFolder org.eclipse.swt.widgets.TabFolder * @return the new page for the tab folder */ Composite createTabFolderPage (TabFolder tabFolder) { super.createTabFolderPage (tabFolder); /* * Add a resize listener to the tabFolderPage so that * if the user types into the example widget to change * its preferred size, and then resizes the shell, we * recalculate the preferred size correctly. */ tabFolderPage.addControlListener(new class() ControlAdapter { public void controlResized(ControlEvent e) { setExampleWidgetSize (); } }); return tabFolderPage; } /** * Gets the "Example" widget children. */ Widget [] getExampleWidgets () { return [ cast(Widget) canvas ]; } /** * Returns a list of set/get API method names (without the set/get prefix) * that can be used to set/get values in the example control(s). */ char[][] getMethodNames() { return ["ToolTipText"]; } /** * Gets the text for the tab folder item. */ char[] getTabText () { return "Canvas"; } /** * Resizes the maximum and thumb of both scrollbars. */ void resizeScrollBars () { Rectangle clientArea = canvas.getClientArea(); ScrollBar bar = canvas.getHorizontalBar(); if (bar !is null) { bar.setMaximum(maxX); bar.setThumb(clientArea.width); bar.setPageIncrement(clientArea.width); } bar = canvas.getVerticalBar(); if (bar !is null) { bar.setMaximum(maxY); bar.setThumb(clientArea.height); bar.setPageIncrement(clientArea.height); } } /** * Scrolls the canvas horizontally. * * @param scrollBar */ void scrollHorizontal (ScrollBar scrollBar) { Rectangle bounds = canvas.getClientArea(); int x = -scrollBar.getSelection(); if (x + maxX < bounds.width) { x = bounds.width - maxX; } canvas.scroll(x, cy, cx, cy, maxX, maxY, false); cx = x; } /** * Scrolls the canvas vertically. * * @param scrollBar */ void scrollVertical (ScrollBar scrollBar) { Rectangle bounds = canvas.getClientArea(); int y = -scrollBar.getSelection(); if (y + maxY < bounds.height) { y = bounds.height - maxY; } canvas.scroll(cx, y, cx, cy, maxX, maxY, false); cy = y; } /** * Sets or clears the caret in the "Example" widget. */ void setCaret () { Caret oldCaret = canvas.getCaret (); if (caretButton.getSelection ()) { Caret newCaret = new Caret(canvas, DWT.NONE); Font font = canvas.getFont(); newCaret.setFont(font); GC gc = new GC(canvas); gc.setFont(font); newCaret.setBounds(1, 1, 1, gc.getFontMetrics().getHeight()); gc.dispose(); canvas.setCaret (newCaret); canvas.setFocus(); } else { canvas.setCaret (null); } if (oldCaret !is null) oldCaret.dispose (); } /** * Sets the state of the "Example" widgets. */ void setExampleWidgetState () { super.setExampleWidgetState (); horizontalButton.setSelection ((canvas.getStyle () & DWT.H_SCROLL) !is 0); verticalButton.setSelection ((canvas.getStyle () & DWT.V_SCROLL) !is 0); borderButton.setSelection ((canvas.getStyle () & DWT.BORDER) !is 0); noBackgroundButton.setSelection ((canvas.getStyle () & DWT.NO_BACKGROUND) !is 0); noFocusButton.setSelection ((canvas.getStyle () & DWT.NO_FOCUS) !is 0); noMergePaintsButton.setSelection ((canvas.getStyle () & DWT.NO_MERGE_PAINTS) !is 0); noRedrawResizeButton.setSelection ((canvas.getStyle () & DWT.NO_REDRAW_RESIZE) !is 0); doubleBufferedButton.setSelection ((canvas.getStyle () & DWT.DOUBLE_BUFFERED) !is 0); if (!instance.startup) setCaret (); } }