Mercurial > projects > dwt-linux
changeset 93:c3d44df6708f
CLabel
author | Frank Benoit <benoit@tionex.de> |
---|---|
date | Fri, 18 Jan 2008 02:03:37 +0100 |
parents | ddb19cb18d2e |
children | d516f11aafe3 |
files | dwt/custom/CLabel.d dwt/dwthelper/utils.d dwt/events/KeyEvent.d dwt/widgets/Event.d |
diffstat | 4 files changed, 834 insertions(+), 3 deletions(-) [+] |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/dwt/custom/CLabel.d Fri Jan 18 02:03:37 2008 +0100 @@ -0,0 +1,832 @@ +/******************************************************************************* + * Copyright (c) 2000, 2006 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.custom.CLabel; + + +import dwt.DWT; +import dwt.DWTException; +import dwt.accessibility.ACC; +import dwt.accessibility.Accessible; +import dwt.accessibility.AccessibleAdapter; +import dwt.accessibility.AccessibleControlAdapter; +import dwt.accessibility.AccessibleControlEvent; +import dwt.accessibility.AccessibleEvent; +import dwt.events.DisposeEvent; +import dwt.events.DisposeListener; +import dwt.events.PaintEvent; +import dwt.events.PaintListener; +import dwt.events.TraverseEvent; +import dwt.events.TraverseListener; +import dwt.graphics.Color; +import dwt.graphics.Font; +import dwt.graphics.GC; +import dwt.graphics.Image; +import dwt.graphics.Point; +import dwt.graphics.Rectangle; +import dwt.widgets.Canvas; +import dwt.widgets.Composite; +import dwt.widgets.Control; +import dwt.widgets.Display; + +static import tango.text.Unicode; +static import tango.text.convert.Utf; + +/** + * A Label which supports aligned text and/or an image and different border styles. + * <p> + * If there is not enough space a CLabel uses the following strategy to fit the + * information into the available space: + * <pre> + * ignores the indent in left align mode + * ignores the image and the gap + * shortens the text by replacing the center portion of the label with an ellipsis + * shortens the text by removing the center portion of the label + * </pre> + * <p> + * <dl> + * <dt><b>Styles:</b> + * <dd>LEFT, RIGHT, CENTER, SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd> + * <dt><b>Events:</b> + * <dd></dd> + * </dl> + * + * </p><p> + * IMPORTANT: This class is <em>not</em> intended to be subclassed. + * </p> + */ +public class CLabel : Canvas { + + /** Gap between icon and text */ + private static const int GAP = 5; + /** Left and right margins */ + private static const int INDENT = 3; + /** a string inserted in the middle of text that has been shortened */ + private static const char[] ELLIPSIS = "..."; //$NON-NLS-1$ // could use the ellipsis glyph on some platforms "\u2026" + /** the alignment. Either CENTER, RIGHT, LEFT. Default is LEFT*/ + private int align_ = DWT.LEFT; + private int hIndent = INDENT; + private int vIndent = INDENT; + /** the current text */ + private char[] text; + /** the current icon */ + private Image image; + // The tooltip is used for two purposes - the application can set + // a tooltip or the tooltip can be used to display the full text when the + // the text has been truncated due to the label being too short. + // The appToolTip stores the tooltip set by the application. Control.tooltiptext + // contains whatever tooltip is currently being displayed. + private char[] appToolTipText; + + private Image backgroundImage; + private Color[] gradientColors; + private int[] gradientPercents; + private bool gradientVertical; + private Color background; + + private static int DRAW_FLAGS = DWT.DRAW_MNEMONIC | DWT.DRAW_TAB | DWT.DRAW_TRANSPARENT | DWT.DRAW_DELIMITER; + +/** + * 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 widget which will be the parent of the new instance (cannot be null) + * @param style the style of widget 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#LEFT + * @see DWT#RIGHT + * @see DWT#CENTER + * @see DWT#SHADOW_IN + * @see DWT#SHADOW_OUT + * @see DWT#SHADOW_NONE + * @see #getStyle() + */ +public this(Composite parent, int style) { + super(parent, checkStyle(style)); + if ((style & (DWT.CENTER | DWT.RIGHT)) is 0) style |= DWT.LEFT; + if ((style & DWT.CENTER) !is 0) align_ = DWT.CENTER; + if ((style & DWT.RIGHT) !is 0) align_ = DWT.RIGHT; + if ((style & DWT.LEFT) !is 0) align_ = DWT.LEFT; + + addPaintListener(new class() PaintListener{ + public void paintControl(PaintEvent event) { + onPaint(event); + } + }); + + addDisposeListener(new class() DisposeListener{ + public void widgetDisposed(DisposeEvent event) { + onDispose(event); + } + }); + + addTraverseListener(new class() TraverseListener { + public void keyTraversed(TraverseEvent event) { + if (event.detail is DWT.TRAVERSE_MNEMONIC) { + onMnemonic(event); + } + } + }); + + initAccessible(); + +} +/** + * Check the style bits to ensure that no invalid styles are applied. + */ +private static int checkStyle (int style) { + if ((style & DWT.BORDER) !is 0) style |= DWT.SHADOW_IN; + int mask = DWT.SHADOW_IN | DWT.SHADOW_OUT | DWT.SHADOW_NONE | DWT.LEFT_TO_RIGHT | DWT.RIGHT_TO_LEFT; + style = style & mask; + return style |= DWT.NO_FOCUS | DWT.DOUBLE_BUFFERED; +} + +//protected void checkSubclass () { +// String name = getClass().getName (); +// String validName = CLabel.class.getName(); +// if (!validName.equals(name)) { +// DWT.error (DWT.ERROR_INVALID_SUBCLASS); +// } +//} + +public Point computeSize(int wHint, int hHint, bool changed) { + checkWidget(); + Point e = getTotalSize(image, text); + if (wHint is DWT.DEFAULT){ + e.x += 2*hIndent; + } else { + e.x = wHint; + } + if (hHint is DWT.DEFAULT) { + e.y += 2*vIndent; + } else { + e.y = hHint; + } + return e; +} +/** + * Draw a rectangle in the given colors. + */ +private void drawBevelRect(GC gc, int x, int y, int w, int h, Color topleft, Color bottomright) { + gc.setForeground(bottomright); + gc.drawLine(x+w, y, x+w, y+h); + gc.drawLine(x, y+h, x+w, y+h); + + gc.setForeground(topleft); + gc.drawLine(x, y, x+w-1, y); + gc.drawLine(x, y, x, y+h-1); +} +/* + * Return the lowercase of the first non-'&' character following + * an '&' character in the given string. If there are no '&' + * characters in the given string, return '\0'. + */ +dchar _findMnemonic (char[] string) { + if (string is null) return '\0'; + int index = 0; + int length = string.length; + do { + while (index < length && string[index] !is '&') index++; + if (++index >= length) return '\0'; + if (string[index] !is '&') { + dchar[1] tmp; uint ate; + dchar[] tmp2 = tango.text.convert.Utf.toString32( string[index .. Math.min( index + 4, string.length ) ], tmp, &ate ); + assert( tmp2.length == 1 ); + return tango.text.Unicode.toLower( tmp2 )[0]; + } + index++; + } while (index < length); + return '\0'; +} +/** + * Returns the alignment. + * The alignment style (LEFT, CENTER or RIGHT) is returned. + * + * @return DWT.LEFT, DWT.RIGHT or DWT.CENTER + */ +public int getAlignment() { + //checkWidget(); + return align_; +} +/** + * Return the CLabel's image or <code>null</code>. + * + * @return the image of the label or null + */ +public Image getImage() { + //checkWidget(); + return image; +} +/** + * Compute the minimum size. + */ +private Point getTotalSize(Image image, char[] text) { + Point size = new Point(0, 0); + + if (image !is null) { + Rectangle r = image.getBounds(); + size.x += r.width; + size.y += r.height; + } + + GC gc = new GC(this); + if (text !is null && text.length > 0) { + Point e = gc.textExtent(text, DRAW_FLAGS); + size.x += e.x; + size.y = Math.max(size.y, e.y); + if (image !is null) size.x += GAP; + } else { + size.y = Math.max(size.y, gc.getFontMetrics().getHeight()); + } + gc.dispose(); + + return size; +} +public int getStyle () { + int style = super.getStyle(); + switch (align_) { + case DWT.RIGHT: style |= DWT.RIGHT; break; + case DWT.CENTER: style |= DWT.CENTER; break; + case DWT.LEFT: style |= DWT.LEFT; break; + default: + } + return style; +} + +/** + * Return the Label's text. + * + * @return the text of the label or null + */ +public char[] getText() { + //checkWidget(); + return text; +} +public char[] getToolTipText () { + checkWidget(); + return appToolTipText; +} +private void initAccessible() { + Accessible accessible = getAccessible(); + accessible.addAccessibleListener(new class() AccessibleAdapter { + public void getName(AccessibleEvent e) { + e.result = getText(); + } + + public void getHelp(AccessibleEvent e) { + e.result = getToolTipText(); + } + + public void getKeyboardShortcut(AccessibleEvent e) { + dchar mnemonic = _findMnemonic(this.outer.text); + if (mnemonic !is '\0') { + dchar[1] d; + d[0] = mnemonic; + e.result = "Alt+" ~ tango.text.convert.Utf.toString(d); //$NON-NLS-1$ + } + } + }); + + accessible.addAccessibleControlListener(new class() AccessibleControlAdapter { + public void getChildAtPoint(AccessibleControlEvent e) { + e.childID = ACC.CHILDID_SELF; + } + + public void getLocation(AccessibleControlEvent e) { + Rectangle rect = getDisplay().map(getParent(), null, getBounds()); + e.x = rect.x; + e.y = rect.y; + e.width = rect.width; + e.height = rect.height; + } + + public void getChildCount(AccessibleControlEvent e) { + e.detail = 0; + } + + public void getRole(AccessibleControlEvent e) { + e.detail = ACC.ROLE_LABEL; + } + + public void getState(AccessibleControlEvent e) { + e.detail = ACC.STATE_READONLY; + } + }); +} +void onDispose(DisposeEvent event) { + gradientColors = null; + gradientPercents = null; + backgroundImage = null; + text = null; + image = null; + appToolTipText = null; +} +void onMnemonic(TraverseEvent event) { + dchar mnemonic = _findMnemonic(text); + if (mnemonic is '\0') return; + dchar[1] d; uint ate; + auto r = tango.text.convert.Utf.toString32( [event.character][], d, &ate ); + if (tango.text.Unicode.toLower(r)[0] !is mnemonic) return; + Composite control = this.getParent(); + while (control !is null) { + Control [] children = control.getChildren(); + int index = 0; + while (index < children.length) { + if (children [index] is this) break; + index++; + } + index++; + if (index < children.length) { + if (children [index].setFocus ()) { + event.doit = true; + event.detail = DWT.TRAVERSE_NONE; + } + } + control = control.getParent(); + } +} + +void onPaint(PaintEvent event) { + Rectangle rect = getClientArea(); + if (rect.width is 0 || rect.height is 0) return; + + bool shortenText_ = false; + char[] t = text; + Image img = image; + int availableWidth = Math.max(0, rect.width - 2*hIndent); + Point extent = getTotalSize(img, t); + if (extent.x > availableWidth) { + img = null; + extent = getTotalSize(img, t); + if (extent.x > availableWidth) { + shortenText_ = true; + } + } + + GC gc = event.gc; + char[][] lines = text is null ? null : splitString(text); + + // shorten the text + if (shortenText_) { + extent.x = 0; + for(int i = 0; i < lines.length; i++) { + Point e = gc.textExtent(lines[i], DRAW_FLAGS); + if (e.x > availableWidth) { + lines[i] = shortenText(gc, lines[i], availableWidth); + extent.x = Math.max(extent.x, getTotalSize(null, lines[i]).x); + } else { + extent.x = Math.max(extent.x, e.x); + } + } + if (appToolTipText is null) { + super.setToolTipText(text); + } + } else { + super.setToolTipText(appToolTipText); + } + + // determine horizontal position + int x = rect.x + hIndent; + if (align_ is DWT.CENTER) { + x = (rect.width - extent.x)/2; + } + if (align_ is DWT.RIGHT) { + x = rect.width - hIndent - extent.x; + } + + // draw a background image behind the text + try { + if (backgroundImage !is null) { + // draw a background image behind the text + Rectangle imageRect = backgroundImage.getBounds(); + // tile image to fill space + gc.setBackground(getBackground()); + gc.fillRectangle(rect); + int xPos = 0; + while (xPos < rect.width) { + int yPos = 0; + while (yPos < rect.height) { + gc.drawImage(backgroundImage, xPos, yPos); + yPos += imageRect.height; + } + xPos += imageRect.width; + } + } else if (gradientColors !is null) { + // draw a gradient behind the text + final Color oldBackground = gc.getBackground(); + if (gradientColors.length is 1) { + if (gradientColors[0] !is null) gc.setBackground(gradientColors[0]); + gc.fillRectangle(0, 0, rect.width, rect.height); + } else { + final Color oldForeground = gc.getForeground(); + Color lastColor = gradientColors[0]; + if (lastColor is null) lastColor = oldBackground; + int pos = 0; + for (int i = 0; i < gradientPercents.length; ++i) { + gc.setForeground(lastColor); + lastColor = gradientColors[i + 1]; + if (lastColor is null) lastColor = oldBackground; + gc.setBackground(lastColor); + if (gradientVertical) { + final int gradientHeight = (gradientPercents[i] * rect.height / 100) - pos; + gc.fillGradientRectangle(0, pos, rect.width, gradientHeight, true); + pos += gradientHeight; + } else { + final int gradientWidth = (gradientPercents[i] * rect.width / 100) - pos; + gc.fillGradientRectangle(pos, 0, gradientWidth, rect.height, false); + pos += gradientWidth; + } + } + if (gradientVertical && pos < rect.height) { + gc.setBackground(getBackground()); + gc.fillRectangle(0, pos, rect.width, rect.height - pos); + } + if (!gradientVertical && pos < rect.width) { + gc.setBackground(getBackground()); + gc.fillRectangle(pos, 0, rect.width - pos, rect.height); + } + gc.setForeground(oldForeground); + } + gc.setBackground(oldBackground); + } else { + if (background !is null || (getStyle() & DWT.DOUBLE_BUFFERED) is 0) { + gc.setBackground(getBackground()); + gc.fillRectangle(rect); + } + } + } catch (DWTException e) { + if ((getStyle() & DWT.DOUBLE_BUFFERED) is 0) { + gc.setBackground(getBackground()); + gc.fillRectangle(rect); + } + } + + // draw border + int style = getStyle(); + if ((style & DWT.SHADOW_IN) !is 0 || (style & DWT.SHADOW_OUT) !is 0) { + paintBorder(gc, rect); + } + + // draw the image + if (img !is null) { + Rectangle imageRect = img.getBounds(); + gc.drawImage(img, 0, 0, imageRect.width, imageRect.height, + x, (rect.height-imageRect.height)/2, imageRect.width, imageRect.height); + x += imageRect.width + GAP; + extent.x -= imageRect.width + GAP; + } + // draw the text + if (lines !is null) { + int lineHeight = gc.getFontMetrics().getHeight(); + int textHeight = lines.length * lineHeight; + int lineY = Math.max(vIndent, rect.y + (rect.height - textHeight) / 2); + gc.setForeground(getForeground()); + for (int i = 0; i < lines.length; i++) { + int lineX = x; + if (lines.length > 1) { + if (align_ is DWT.CENTER) { + int lineWidth = gc.textExtent(lines[i], DRAW_FLAGS).x; + lineX = x + Math.max(0, (extent.x - lineWidth) / 2); + } + if (align_ is DWT.RIGHT) { + int lineWidth = gc.textExtent(lines[i], DRAW_FLAGS).x; + lineX = Math.max(x, rect.x + rect.width - hIndent - lineWidth); + } + } + gc.drawText(lines[i], lineX, lineY, DRAW_FLAGS); + lineY += lineHeight; + } + } +} +/** + * Paint the Label's border. + */ +private void paintBorder(GC gc, Rectangle r) { + Display disp= getDisplay(); + + Color c1 = null; + Color c2 = null; + + int style = getStyle(); + if ((style & DWT.SHADOW_IN) !is 0) { + c1 = disp.getSystemColor(DWT.COLOR_WIDGET_NORMAL_SHADOW); + c2 = disp.getSystemColor(DWT.COLOR_WIDGET_HIGHLIGHT_SHADOW); + } + if ((style & DWT.SHADOW_OUT) !is 0) { + c1 = disp.getSystemColor(DWT.COLOR_WIDGET_LIGHT_SHADOW); + c2 = disp.getSystemColor(DWT.COLOR_WIDGET_NORMAL_SHADOW); + } + + if (c1 !is null && c2 !is null) { + gc.setLineWidth(1); + drawBevelRect(gc, r.x, r.y, r.width-1, r.height-1, c1, c2); + } +} +/** + * Set the alignment of the CLabel. + * Use the values LEFT, CENTER and RIGHT to align image and text within the available space. + * + * @param align the alignment style of LEFT, RIGHT or CENTER + * + * @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> + * <li>ERROR_INVALID_ARGUMENT - if the value of align is not one of DWT.LEFT, DWT.RIGHT or DWT.CENTER</li> + * </ul> + */ +public void setAlignment(int align_) { + checkWidget(); + if (align_ !is DWT.LEFT && align_ !is DWT.RIGHT && align_ !is DWT.CENTER) { + DWT.error(DWT.ERROR_INVALID_ARGUMENT); + } + if (this.align_ !is align_) { + this.align_ = align_; + redraw(); + } +} + +public void setBackground (Color color) { + super.setBackground (color); + // Are these settings the same as before? + if (backgroundImage is null && + gradientColors is null && + gradientPercents is null) { + if (color is null) { + if (background is null) return; + } else { + if (color ==/*eq*/ background) return; + } + } + background = color; + backgroundImage = null; + gradientColors = null; + gradientPercents = null; + redraw (); +} + +/** + * Specify a gradient of colours to be drawn in the background of the CLabel. + * <p>For example, to draw a gradient that varies from dark blue to blue and then to + * white and stays white for the right half of the label, use the following call + * to setBackground:</p> + * <pre> + * clabel.setBackground(new Color[]{display.getSystemColor(DWT.COLOR_DARK_BLUE), + * display.getSystemColor(DWT.COLOR_BLUE), + * display.getSystemColor(DWT.COLOR_WHITE), + * display.getSystemColor(DWT.COLOR_WHITE)}, + * new int[] {25, 50, 100}); + * </pre> + * + * @param colors an array of Color that specifies the colors to appear in the gradient + * in order of appearance from left to right; The value <code>null</code> + * clears the background gradient; the value <code>null</code> can be used + * inside the array of Color to specify the background color. + * @param percents an array of integers between 0 and 100 specifying the percent of the width + * of the widget at which the color should change; the size of the percents + * array must be one less than the size of the colors array. + * + * @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> + * <li>ERROR_INVALID_ARGUMENT - if the values of colors and percents are not consistent</li> + * </ul> + */ +public void setBackground(Color[] colors, int[] percents) { + setBackground(colors, percents, false); +} +/** + * Specify a gradient of colours to be drawn in the background of the CLabel. + * <p>For example, to draw a gradient that varies from dark blue to white in the vertical, + * direction use the following call + * to setBackground:</p> + * <pre> + * clabel.setBackground(new Color[]{display.getSystemColor(DWT.COLOR_DARK_BLUE), + * display.getSystemColor(DWT.COLOR_WHITE)}, + * new int[] {100}, true); + * </pre> + * + * @param colors an array of Color that specifies the colors to appear in the gradient + * in order of appearance from left/top to right/bottom; The value <code>null</code> + * clears the background gradient; the value <code>null</code> can be used + * inside the array of Color to specify the background color. + * @param percents an array of integers between 0 and 100 specifying the percent of the width/height + * of the widget at which the color should change; the size of the percents + * array must be one less than the size of the colors array. + * @param vertical indicate the direction of the gradient. True is vertical and false is horizontal. + * + * @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> + * <li>ERROR_INVALID_ARGUMENT - if the values of colors and percents are not consistent</li> + * </ul> + * + * @since 3.0 + */ +public void setBackground(Color[] colors, int[] percents, bool vertical) { + checkWidget(); + if (colors !is null) { + if (percents is null || percents.length !is colors.length - 1) { + DWT.error(DWT.ERROR_INVALID_ARGUMENT); + } + if (getDisplay().getDepth() < 15) { + // Don't use gradients on low color displays + colors = [colors[colors.length - 1]]; + percents = null; + } + for (int i = 0; i < percents.length; i++) { + if (percents[i] < 0 || percents[i] > 100) { + DWT.error(DWT.ERROR_INVALID_ARGUMENT); + } + if (i > 0 && percents[i] < percents[i-1]) { + DWT.error(DWT.ERROR_INVALID_ARGUMENT); + } + } + } + + // Are these settings the same as before? + final Color background = getBackground(); + if (backgroundImage is null) { + if ((gradientColors !is null) && (colors !is null) && + (gradientColors.length is colors.length)) { + bool same = false; + for (int i = 0; i < gradientColors.length; i++) { + same = (gradientColors[i] is colors[i]) || + ((gradientColors[i] is null) && (colors[i] is background)) || + ((gradientColors[i] is background) && (colors[i] is null)); + if (!same) break; + } + if (same) { + for (int i = 0; i < gradientPercents.length; i++) { + same = gradientPercents[i] is percents[i]; + if (!same) break; + } + } + if (same && this.gradientVertical is vertical) return; + } + } else { + backgroundImage = null; + } + // Store the new settings + if (colors is null) { + gradientColors = null; + gradientPercents = null; + gradientVertical = false; + } else { + gradientColors = new Color[colors.length]; + for (int i = 0; i < colors.length; ++i) + gradientColors[i] = (colors[i] !is null) ? colors[i] : background; + gradientPercents = new int[percents.length]; + for (int i = 0; i < percents.length; ++i) + gradientPercents[i] = percents[i]; + gradientVertical = vertical; + } + // Refresh with the new settings + redraw(); +} +/** + * Set the image to be drawn in the background of the label. + * + * @param image the image to be drawn in the background + * + * @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 setBackground(Image image) { + checkWidget(); + if (image is backgroundImage) return; + if (image !is null) { + gradientColors = null; + gradientPercents = null; + } + backgroundImage = image; + redraw(); + +} +public void setFont(Font font) { + super.setFont(font); + redraw(); +} +/** + * Set the label's Image. + * The value <code>null</code> clears it. + * + * @param image the image to be displayed in the label or 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 void setImage(Image image) { + checkWidget(); + if (image !is this.image) { + this.image = image; + redraw(); + } +} +/** + * Set the label's text. + * The value <code>null</code> clears it. + * + * @param text the text to be displayed in the label or 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 void setText(char[] text) { + checkWidget(); + if (text is null) text = ""; //$NON-NLS-1$ + if ( text !=/*eq*/ this.text) { + this.text = text; + redraw(); + } +} +public void setToolTipText (char[] string) { + super.setToolTipText (string); + appToolTipText = super.getToolTipText(); +} +/** + * Shorten the given text <code>t</code> so that its length doesn't exceed + * the given width. The default implementation replaces characters in the + * center of the original string with an ellipsis ("..."). + * Override if you need a different strategy. + * + * @param gc the gc to use for text measurement + * @param t the text to shorten + * @param width the width to shorten the text to, in pixels + * @return the shortened text + */ +protected char[] shortenText(GC gc, char[] t, int width) { + if (t is null) return null; + int w = gc.textExtent(ELLIPSIS, DRAW_FLAGS).x; + if (width<=w) return t; + int l = t.length; + int max = l/2; + int min = 0; + int mid = (max+min)/2 - 1; + if (mid <= 0) return t; + while (min < mid && mid < max) { + char[] s1 = t[0 .. mid].dup; + char[] s2 = t[l-mid .. l].dup; + int l1 = gc.textExtent(s1, DRAW_FLAGS).x; + int l2 = gc.textExtent(s2, DRAW_FLAGS).x; + if (l1+w+l2 > width) { + max = mid; + mid = (max+min)/2; + } else if (l1+w+l2 < width) { + min = mid; + mid = (max+min)/2; + } else { + min = max; + } + } + if (mid is 0) return t; + return t[ 0 .. mid ] ~ ELLIPSIS ~ t[ l-mid .. l ]; +} + +private char[][] splitString(char[] text) { + char[][] lines = new char[][1]; + int start = 0, pos; + do { + pos = tango.text.Util.locate( text, '\n', start); + if (pos is text.length ) { + lines[lines.length - 1] = text[start .. $ ]; + } else { + bool crlf = (pos > 0) && (text[ pos - 1 ] is '\r'); + lines[lines.length - 1] = text[ start .. pos - (crlf ? 1 : 0)]; + start = pos + 1; + char[][] newLines = new char[][lines.length+1]; + System.arraycopy(lines, 0, newLines, 0, lines.length); + lines = newLines; + } + } while (pos !is -1); + return lines; +} +}
--- a/dwt/dwthelper/utils.d Fri Jan 18 00:34:32 2008 +0100 +++ b/dwt/dwthelper/utils.d Fri Jan 18 02:03:37 2008 +0100 @@ -32,4 +32,3 @@ -
--- a/dwt/events/KeyEvent.d Fri Jan 18 00:34:32 2008 +0100 +++ b/dwt/events/KeyEvent.d Fri Jan 18 02:03:37 2008 +0100 @@ -47,7 +47,7 @@ * character value based on a stateMask (such as DWT.CTRL) or the resulting * character will not be correct. */ - public char character; + public wchar character = '\0'; /** * the key code of the key that was typed,
--- a/dwt/widgets/Event.d Fri Jan 18 00:34:32 2008 +0100 +++ b/dwt/widgets/Event.d Fri Jan 18 02:03:37 2008 +0100 @@ -146,7 +146,7 @@ * character value based on a stateMask (such as DWT.CTRL) or the * resulting character will not be correct. */ - public char character; + public wchar character = '\0'; /** * depending on the event, the key code of the key that was typed,