root/branches/0.2/controlexample/styledtexttab.d

/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
module controlexample.styledtexttab;

private {
import swt.all;
import controlexample.tab;
import controlexample.scrollabletab;
import controlexample.controlexample;
}


class StyledTextTab : ScrollableTab {
    /* Example widgets and groups that contain them */
    StyledText styledText;
    Group styledTextGroup, styledTextStyleGroup;

    /* Style widgets added to the "Style" group */
    Button wrapButton, readOnlyButton, fullSelectionButton;
    
    /* Buttons for adding StyleRanges to StyledText */
    Button boldButton, italicButton, redButton, yellowButton;
    Image boldImage, italicImage, redImage, yellowImage;

    /**
     * Creates the Tab within a given instance_ren of ControlExample.
     */
    this(ControlExample instance_ren) {
        super(instance_ren);
    }
    
    /**
     * Creates a bitmap image. 
     */
    Image createBitmapImage (Display display, String name) {
        ImageData source = new ImageData(name ~ ".bmp");
        ImageData mask = new ImageData(name ~ "_mask.bmp");
        return new Image (display, source, mask);
    }
    
    /**
     * Creates the "Control" widget children.
     */
    void createControlWidgets () {
        super.createControlWidgets ();
        
        /* Add a group for modifying the StyledText widget */
        createStyledTextStyleGroup ();
    }

    /**
     * Creates the "Example" group.
     */
    void createExampleGroup () {
        super.createExampleGroup ();
        
        /* Create a group for the styled text widget */
        styledTextGroup = new Group (exampleGroup, SWT.NONE);
        styledTextGroup.setLayout (new GridLayout ());
        styledTextGroup.setLayoutData (new GridData (GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_FILL));
        styledTextGroup.setText ("StyledText");
    }
    
    /**
     * Creates the "Example" widgets.
     */
    void createExampleWidgets () {
        
        /* Compute the widget style */
        int style = getDefaultStyle();
        if (singleButton.getSelection ()) style |= SWT.SINGLE;
        if (multiButton.getSelection ()) style |= SWT.MULTI;
        if (horizontalButton.getSelection ()) style |= SWT.H_SCROLL;
        if (verticalButton.getSelection ()) style |= SWT.V_SCROLL;
        if (wrapButton.getSelection ()) style |= SWT.WRAP;
        if (readOnlyButton.getSelection ()) style |= SWT.READ_ONLY;
        if (borderButton.getSelection ()) style |= SWT.BORDER;
        if (fullSelectionButton.getSelection ()) style |= SWT.FULL_SELECTION;
    
        /* Create the example widgets */
        styledText = new StyledText (styledTextGroup, style);
        styledText.setText ("The quick brown fox jumps over the lazy dog.");//ControlExample.getResourceString("Example_string"));
        styledText.append ("\n");
        styledText.append ("One Two Three");//ControlExample.getResourceString("One_Two_Three"));
    }
    
    /**
     * Creates the "Style" group.
     */
    void createStyleGroup() {
        super.createStyleGroup();
    
        /* Create the extra widgets */
        wrapButton = new Button (styleGroup, SWT.CHECK);
        wrapButton.setText ("SWT.WRAP");
        readOnlyButton = new Button (styleGroup, SWT.CHECK);
        readOnlyButton.setText ("SWT.READ_ONLY");
        fullSelectionButton = new Button (styleGroup, SWT.CHECK);
        fullSelectionButton.setText ("SWT.FULL_SELECTION");
    }
    
    /**
     * Creates the "StyledText Style" group.
     */
    void createStyledTextStyleGroup () {
        Display display = controlGroup.getDisplay ();
        styledTextStyleGroup = new Group (controlGroup, SWT.NONE);
        styledTextStyleGroup.setText (ControlExample.getResourceString ("StyledText_Styles"));
        styledTextStyleGroup.setLayout (new GridLayout(5, false));
        GridData data = new GridData (GridData.HORIZONTAL_ALIGN_FILL);
        data.horizontalSpan = 2;
        styledTextStyleGroup.setLayoutData (data);
        
        /* Get images */
        boldImage = createBitmapImage (display, "bold");
        italicImage = createBitmapImage (display, "italic");
        redImage = createBitmapImage (display, "red");
        yellowImage = createBitmapImage (display, "yellow");
        
        /* Create controls to modify the StyledText */
        Label label = new Label (styledTextStyleGroup, SWT.NONE);
        label.setText (ControlExample.getResourceString ("StyledText_Style_Instructions"));
        data = new GridData(GridData.FILL_HORIZONTAL);
        data.horizontalSpan = 5;
        label.setLayoutData(data);
        with(new Label (styledTextStyleGroup, SWT.NONE)){
            setText (ControlExample.getResourceString ("Bold"));
        }
        boldButton = new Button (styledTextStyleGroup, SWT.PUSH);
        boldButton.setImage (boldImage);
        boldButton.handleSelection(this, delegate(SelectionEvent e) {
            StyledTextTab c = cast(StyledTextTab)e.cData;
            Point sel = c.styledText.getSelectionRange();
            if ((sel is null) || (sel.y == 0)) return;
            StyleRange style;
            for (int i = sel.x; i<sel.x+sel.y; i++) {
                StyleRange range = c.styledText.getStyleRangeAtOffset(i);
                if (range is null) {style = new StyleRange(i, 1, null, null, SWT.BOLD);}
                else {style = new StyleRange(i, 1, range.foreground, range.background, range.fontStyle | SWT.BOLD);};
                c.styledText.setStyleRange(style);
            }
            c.styledText.setSelectionRange(sel.x + sel.y, 0);
        });
        with(new Label (styledTextStyleGroup, SWT.NONE)){
            setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        }
        with(new Label (styledTextStyleGroup, SWT.NONE)) {
            setText (ControlExample.getResourceString ("Foreground_Style"));
        }
        redButton = new Button (styledTextStyleGroup, SWT.PUSH);
        redButton.setImage (redImage);
        with(new Label (styledTextStyleGroup, SWT.NONE)) {
            setText (ControlExample.getResourceString ("Italic"));
        }
        italicButton = new Button (styledTextStyleGroup, SWT.PUSH);
        italicButton.setImage (italicImage);
        italicButton.handleSelection(this, delegate(SelectionEvent e) {
            StyledTextTab c = cast(StyledTextTab)e.cData;
            Point sel = c.styledText.getSelectionRange();
            if ((sel is null) || (sel.y == 0)) return;
            StyleRange style;
            for (int i = sel.x; i<sel.x+sel.y; i++) {
                StyleRange range = c.styledText.getStyleRangeAtOffset(i);
                if (range is null) {style = new StyleRange(i, 1, null, null, SWT.ITALIC);}
                else {style = new StyleRange(i, 1, range.foreground, range.background, range.fontStyle | SWT.ITALIC);};
                c.styledText.setStyleRange(style);
            }
            c.styledText.setSelectionRange(sel.x + sel.y, 0);
        });
        with(new Label (styledTextStyleGroup, SWT.NONE)) {
            setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        }
        with(new Label (styledTextStyleGroup, SWT.NONE)){
            setText (ControlExample.getResourceString ("Background_Style"));
        }
        yellowButton = new Button (styledTextStyleGroup, SWT.PUSH);
        yellowButton.setImage (yellowImage);

        void widgetSelected (SelectionEvent e) {
            StyledTextTab c = cast(StyledTextTab)e.cData;
            Point sel = c.styledText.getSelectionRange();
            if ((sel is null) || (sel.y == 0)) return;
            Color fg, bg;
            if (e.widget is c.redButton) {
                fg = display.getSystemColor (SWT.COLOR_RED);
                bg = null;
            } else if (e.widget is yellowButton) {
                fg = null;
                bg = display.getSystemColor (SWT.COLOR_YELLOW);
            } else {
                fg = bg = null;
            }
            StyleRange style;
            for (int i = sel.x; i<sel.x+sel.y; i++) {
                StyleRange range = c.styledText.getStyleRangeAtOffset(i);
                if (range is null) {
                    style = new StyleRange(i, 1, fg, bg, SWT.NORMAL);
                }
                else {
                    if (range.foreground !== null) fg = range.foreground;
                    if (range.background !== null) bg = range.background;
                    style = new StyleRange(i, 1, fg, bg, range.fontStyle);
                };
                c.styledText.setStyleRange(style);
            }
            c.styledText.setSelectionRange(sel.x + sel.y, 0);
        };
        
        redButton.handleSelection(this, &widgetSelected);
        yellowButton.handleSelection(this, &widgetSelected);
        yellowButton.handleDispose(this, delegate(DisposeEvent e) {
            StyledTextTab c = cast(StyledTextTab)e.cData;
            c.boldImage.dispose();
            c.italicImage.dispose();
            c.redImage.dispose();
            c.yellowImage.dispose();
        });
    }
    
    /**
     * 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.handleEvent(this, SWT.Resize, &setExampleWidgetSize);
        
        return tabFolderPage;
    }

    /**
     * Gets the "Example" widget children.
     */
    Control [] getExampleWidgets () {
        Control [] controls;
        controls ~= styledText;
        return controls;
    }
    
    /**
     * Gets the text for the tab folder item.
     */
    String getTabText () {
        return "StyledText";
    }
    
    /**
     * Sets the state of the "Example" widgets.
     */
    void setExampleWidgetState () {
        super.setExampleWidgetState ();
        wrapButton.setSelection ((styledText.getStyle () & SWT.WRAP) != 0);
        readOnlyButton.setSelection ((styledText.getStyle () & SWT.READ_ONLY) != 0);
        fullSelectionButton.setSelection ((styledText.getStyle () & SWT.FULL_SELECTION) != 0);
        horizontalButton.setEnabled ((styledText.getStyle () & SWT.MULTI) != 0);
        verticalButton.setEnabled ((styledText.getStyle () & SWT.MULTI) != 0);
        wrapButton.setEnabled ((styledText.getStyle () & SWT.MULTI) != 0);
    }
}