public void setImage(Image image) {
checkWidget();
if ((style & SWT.SEPARATOR) != 0) return;
if (image != null && image.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
super.setImage(image);
updateImages(getEnabled() && parent.getEnabled());
}
void hookEvents() {
super.hookEvents();
if ((style & SWT.SEPARATOR) != 0) return;
if ((style & (SWT.RADIO | SWT.CHECK)) != 0) {
int handler = OS.gcnew_RoutedEventHandler(jniRef, "HandleChecked");
if (handler == 0) error(SWT.ERROR_NO_HANDLES);
OS.ToggleButton_Checked(handle, handler);
OS.GCHandle_Free(handler);
handler = OS.gcnew_RoutedEventHandler(jniRef, "HandleUnchecked");
if (handler == 0) error(SWT.ERROR_NO_HANDLES);
OS.ToggleButton_Unchecked(handle, handler);
OS.GCHandle_Free(handler);
} else {
int handler = OS.gcnew_RoutedEventHandler(jniRef, "HandleClick");
if (handler == 0) error(SWT.ERROR_NO_HANDLES);
OS.ButtonBase_Click(handle, handler);
OS.GCHandle_Free(handler);
}
int handler = OS.gcnew_MouseEventHandler(jniRef, "HandleMouseEnter");
if (handler == 0) error(SWT.ERROR_NO_HANDLES);
OS.UIElement_MouseEnter(handle, handler);
OS.GCHandle_Free(handler);
handler = OS.gcnew_MouseEventHandler(jniRef, "HandleMouseLeave");
if (handler == 0) error(SWT.ERROR_NO_HANDLES);
OS.UIElement_MouseLeave(handle, handler);
OS.GCHandle_Free(handler);
}
void releaseHandle() {
super.releaseHandle();
if (handle != 0) OS.GCHandle_Free(handle);
handle = 0;
if (imageHandle != 0) {
OS.GCHandle_Free(imageHandle);
imageHandle = 0;
}
if (textHandle != 0) {
OS.GCHandle_Free(textHandle);
textHandle = 0;
}
if (arrowHandle != 0) {
OS.GCHandle_Free(arrowHandle);
arrowHandle = 0;
}
parent = null;
}
/**
* Sets the receiver's text. The string may include the mnemonic character.
*
* <p>Mnemonics are indicated by an '&' that causes the next character to be the mnemonic.
* When the user presses a key sequence that matches the mnemonic, a selection event occurs. On
* most platforms, the mnemonic appears underlined but may be emphasised in a platform specific
* manner. The mnemonic indicator character '&' can be escaped by doubling it in the string,
* causing a single '&' to be displayed.
*
* @param string the new text
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the text is null
* </ul>
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
* </ul>
*/
public void setText(String string) {
checkWidget();
if (string == null) error(SWT.ERROR_NULL_ARGUMENT);
if ((style & SWT.SEPARATOR) != 0) return;
if (string.equals(text)) return;
super.setText(string);
int strPtr = createDotNetString(string, true);
if (strPtr == 0) error(SWT.ERROR_NO_HANDLES);
OS.AccessText_Text(textHandle, strPtr);
OS.GCHandle_Free(strPtr);
OS.UIElement_Visibility(
textHandle,
string.length() == 0 && image != null ? OS.Visibility_Collapsed : OS.Visibility_Visible);
int spacing = image != null && text.length() != 0 ? 3 : 0;
int margin =
(parent.style & SWT.RIGHT) != 0
? OS.gcnew_Thickness(0, 0, spacing, 0)
: OS.gcnew_Thickness(0, 0, 0, spacing);
OS.FrameworkElement_Margin(imageHandle, margin);
OS.GCHandle_Free(margin);
}
void releaseWidget() {
super.releaseWidget();
control = null;
toolTipText = null;
image = disabledImage = hotImage = null;
}
