Community
Participate
Working Groups
20030730 When you give focus to a toolbar button that is a toggle button it is read as a checkbox by MSAA rather than as a toggle button. STEPS 1) Select a toggle button on a tool bar 2) Look at it using Inspect Objects - its type will be checkbox
Ignore previous priority reassignment to P4. Meant to reassign to P1, but used wheel mouse to scroll down.... which changed the priority to P4 when I wasn't looking...
This is because there is no such thing as a "toggle" button in a toolbar on Windows... it is actually a "check" button. Here's the relevant paragraph from the MSDN. BTNS_CHECK Version 5.80. Creates a dual-state push button that toggles between the pressed and nonpressed states each time the user clicks it. The button has a different background color when it is in the pressed state. Having said that, however, we can fake it so that the MS inspector reads "push button" for the role, and "pressed" (or nothing) for the state. Now think about this... is that what you really want? What is wrong with JAWS saying "checkbox, checked" or "checkbox, not checked" for a 'toggle-ish' button in a toolbar? I sounds ok to me, and makes more sense - i.e. conveys more information - than having JAWS read "push button, pressed" when it's pressed, and just "push button" when it isn't. Please make sure you really want to change the current behavior before you do anything further... Moving this bug back to UI to make this decision, and if you decide to do it (against my recommendation <g>) then you need to implement it as outlined in the SWT snippet example below. So... here's an SWT snippet to play with, to help you make your decision. Compare this, using MSAA Inspector and using JAWS, to the equivalent buttons in MS Word. To make the snippet behave like Word, uncomment the commented lines. Word does not give focus to tool buttons, so they are less accessible than we are there... but also, I don't think that saying "push button" is very accessible for an unselected toggle. import org.eclipse.swt.*; import org.eclipse.swt.graphics.*; import org.eclipse.swt.widgets.*; import org.eclipse.swt.layout.*; import org.eclipse.swt.accessibility.*; public class ToggleButtonInToolBarTest { static Display display; static Shell shell; static String[] toolNames = {"B", "I", "U"}; static String[] toolTips = {"Bold", "Italic", "Underline"}; public static void main(String[] args) { display = new Display(); shell = new Shell(display); shell.setLayout(new GridLayout()); shell.setText("Toggles In ToolBar"); ToolBar toolBar = new ToolBar(shell, SWT.FLAT); for (int tool = 0; tool < toolNames.length; tool++) { ToolItem item = new ToolItem(toolBar, SWT.CHECK); item.setText(toolNames[tool]); item.setToolTipText(toolTips[tool]); } toolBar.getAccessible().addAccessibleListener(new AccessibleAdapter() { public void getName(AccessibleEvent e) { if (e.childID != ACC.CHILDID_SELF) { Accessible accessible = (Accessible) e.getSource(); ToolBar toolBar = (ToolBar) accessible.getControl(); ToolItem item = toolBar.getItem (e.childID); if (item != null) { e.result = item.getToolTipText (); } } } }); // toolBar.getAccessible().addAccessibleControlListener(new AccessibleControlAdapter() { // public void getRole(AccessibleControlEvent e) { // if (e.childID != ACC.CHILDID_SELF) { // Accessible accessible = (Accessible) e.getSource(); // ToolBar toolBar = (ToolBar) accessible.getControl(); // ToolItem item = toolBar.getItem (e.childID); // if (item != null) { // e.detail = ACC.ROLE_PUSHBUTTON; // } // } // } // public void getState(AccessibleControlEvent e) { // if (e.childID != ACC.CHILDID_SELF) { // Accessible accessible = (Accessible) e.getSource(); // ToolBar toolBar = (ToolBar) accessible.getControl(); // ToolItem item = toolBar.getItem (e.childID); // if (item != null) { // e.detail = ACC.STATE_FOCUSABLE; // if (item.getSelection()) { // e.detail |= ACC.STATE_PRESSED; // } // } // } // } // }); shell.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } static Image createToolBarIcon(Display display, String fileName) { try { ImageData source = new ImageData (ToggleButtonInToolBarTest.class.getResourceAsStream(fileName + ".gif")); ImageData mask = source.getTransparencyMask(); return new Image(display, source, mask); } catch (Exception e) { } return null; } }
We won't want to do this for every button we create - that would be overkill. We can leave it as is if that is the OS support.
