/** * 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); }