/**
* Enables the receiver if the argument is <code>true</code>, and disables it otherwise.
*
* <p>A disabled control is typically not selectable from the user interface and draws with an
* inactive or "grayed" look.
*
* @param enabled the new enabled state
* @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 setEnabled(boolean enabled) {
checkWidget();
long /*int*/ topHandle = topHandle();
if (OS.GTK_WIDGET_SENSITIVE(topHandle) == enabled) return;
OS.gtk_widget_set_sensitive(topHandle, enabled);
if (enabled) {
/*
* Bug in GTK. GtkButton requires an enter notify before it
* allows the button to be pressed, but events are dropped when
* widgets are insensitive. The fix is to hide and show the
* button if the pointer is within its bounds.
*/
int[] x = new int[1], y = new int[1];
OS.gdk_window_get_pointer(parent.paintWindow(), x, y, null);
if (getBounds().contains(x[0], y[0])) {
OS.gtk_widget_hide(handle);
OS.gtk_widget_show(handle);
}
} else {
/*
* Bug in GTK. Starting with 2.14, if a button is disabled
* through on a button press, the field which keeps track
* whether the pointer is currently in the button is never updated.
* As a result, when it is re-enabled it automatically enters
* a PRELIGHT state. The fix is to set a NORMAL state.
*/
if (OS.GTK_VERSION >= OS.VERSION(2, 14, 0)) {
OS.gtk_widget_set_state(topHandle, OS.GTK_STATE_NORMAL);
}
}
}
void createHandle(int index) {
state |= HANDLE;
int bits = SWT.SEPARATOR | SWT.RADIO | SWT.CHECK | SWT.PUSH | SWT.DROP_DOWN;
if ((style & SWT.SEPARATOR) == 0) {
labelHandle = OS.gtk_label_new_with_mnemonic(null);
if (labelHandle == 0) error(SWT.ERROR_NO_HANDLES);
imageHandle = OS.gtk_image_new_from_pixbuf(0);
if (imageHandle == 0) error(SWT.ERROR_NO_HANDLES);
}
switch (style & bits) {
case SWT.SEPARATOR:
handle = OS.gtk_separator_tool_item_new();
if (handle == 0) error(SWT.ERROR_NO_HANDLES);
OS.gtk_separator_tool_item_set_draw(handle, true);
break;
case SWT.DROP_DOWN:
if (OS.GTK_VERSION >= OS.VERSION(2, 6, 0)) {
handle = OS.gtk_menu_tool_button_new(0, null);
if (handle == 0) error(SWT.ERROR_NO_HANDLES);
/*
* Feature in GTK. The arrow button of DropDown tool-item is
* disabled when it does not contain menu. The fix is to
* find the arrow button handle and enable it.
*/
long /*int*/ child = OS.gtk_bin_get_child(handle);
long /*int*/ list = OS.gtk_container_get_children(child);
arrowHandle = OS.g_list_nth_data(list, 1);
OS.gtk_widget_set_sensitive(arrowHandle, true);
OS.gtk_widget_set_size_request(OS.gtk_bin_get_child(arrowHandle), 8, 6);
} else {
/*
* GTK does not support GtkMenuToolButton until 2.6.
* So, we try to emulate it on the un-supported version.
*/
handle = OS.gtk_tool_button_new(0, null);
if (handle == 0) error(SWT.ERROR_NO_HANDLES);
arrowBoxHandle = OS.gtk_hbox_new(false, 0);
if (arrowBoxHandle == 0) error(SWT.ERROR_NO_HANDLES);
arrowHandle = OS.gtk_arrow_new(OS.GTK_ARROW_DOWN, OS.GTK_SHADOW_NONE);
if (arrowHandle == 0) error(SWT.ERROR_NO_HANDLES);
OS.gtk_widget_set_size_request(arrowHandle, 8, 6);
OS.gtk_container_add(arrowBoxHandle, labelHandle);
OS.gtk_container_add(arrowBoxHandle, arrowHandle);
/*
* As we are try to emulate GtkMenuToolButton and in order
* to display both the label and image, it is required
* the set the toolitem as important. This will entitle
* to display the label all the times.
*/
OS.gtk_tool_item_set_is_important(handle, true);
}
break;
case SWT.RADIO:
/*
* Because GTK enforces radio behavior in a button group
* a radio group is not created for each set of contiguous
* buttons, each radio button will not draw unpressed.
* The fix is to use toggle buttons instead.
*/
case SWT.CHECK:
handle = OS.gtk_toggle_tool_button_new();
if (handle == 0) error(SWT.ERROR_NO_HANDLES);
break;
case SWT.PUSH:
default:
handle = OS.gtk_tool_button_new(0, null);
if (handle == 0) error(SWT.ERROR_NO_HANDLES);
break;
}
if (labelHandle != 0) {
OS.gtk_tool_button_set_label_widget(handle, labelHandle);
}
if (imageHandle != 0) {
OS.gtk_tool_button_set_icon_widget(handle, imageHandle);
}
if ((parent.state & FOREGROUND) != 0) {
setForegroundColor(parent.getForegroundColor());
}
if ((parent.state & FONT) != 0) {
setFontDescription(parent.getFontDescription());
}
/*
* Feature in GTK. GtkToolButton class uses this property to
* determine whether to show or hide its label when the toolbar
* style is GTK_TOOLBAR_BOTH_HORIZ (or SWT.RIGHT).
*/
if ((parent.style & SWT.RIGHT) != 0) OS.gtk_tool_item_set_is_important(handle, true);
if ((style & SWT.SEPARATOR) == 0) OS.gtk_tool_button_set_use_underline(handle, true);
}