+// ----------------------------------------------------------------------------
+// bitmaps support
+// ----------------------------------------------------------------------------
+
+void wxButton::GTKMouseEnters()
+{
+ m_isCurrent = true;
+
+ GTKUpdateBitmap();
+}
+
+void wxButton::GTKMouseLeaves()
+{
+ m_isCurrent = false;
+
+ GTKUpdateBitmap();
+}
+
+void wxButton::GTKPressed()
+{
+ m_isPressed = true;
+
+ GTKUpdateBitmap();
+}
+
+void wxButton::GTKReleased()
+{
+ m_isPressed = false;
+
+ GTKUpdateBitmap();
+}
+
+void wxButton::GTKOnFocus(wxFocusEvent& event)
+{
+ event.Skip();
+
+ GTKUpdateBitmap();
+}
+
+wxButton::State wxButton::GTKGetCurrentState() const
+{
+ if ( !IsThisEnabled() )
+ return m_bitmaps[State_Disabled].IsOk() ? State_Disabled : State_Normal;
+
+ if ( m_isPressed && m_bitmaps[State_Pressed].IsOk() )
+ return State_Pressed;
+
+ if ( m_isCurrent && m_bitmaps[State_Current].IsOk() )
+ return State_Current;
+
+ if ( HasFocus() && m_bitmaps[State_Focused].IsOk() )
+ return State_Focused;
+
+ return State_Normal;
+}
+
+void wxButton::GTKUpdateBitmap()
+{
+ // if we don't show bitmaps at all, there is nothing to update
+ if ( m_bitmaps[State_Normal].IsOk() )
+ {
+ // if we do show them, this will return a state for which we do have a
+ // valid bitmap
+ State state = GTKGetCurrentState();
+
+ GTKDoShowBitmap(m_bitmaps[state]);
+ }
+}
+
+void wxButton::GTKDoShowBitmap(const wxBitmap& bitmap)
+{
+ wxASSERT_MSG( bitmap.IsOk(), "invalid bitmap" );
+
+ GtkWidget *image;
+ if ( DontShowLabel() )
+ {
+ image = GTK_BIN(m_widget)->child;
+ }
+ else // have both label and bitmap
+ {
+#ifdef __WXGTK26__
+ if ( !gtk_check_version(2,6,0) )
+ {
+ image = gtk_button_get_image(GTK_BUTTON(m_widget));
+ }
+ else
+#endif // __WXGTK26__
+ {
+ // buttons with both label and bitmap are only supported with GTK+
+ // 2.6 so far
+ //
+ // it shouldn't be difficult to implement them ourselves for the
+ // previous GTK+ versions by stuffing a container with a label and
+ // an image inside GtkButton but there doesn't seem to be much
+ // point in doing this for ancient GTK+ versions
+ return;
+ }
+ }
+
+ wxCHECK_RET( image && GTK_IS_IMAGE(image), "must have image widget" );
+
+ gtk_image_set_from_pixbuf(GTK_IMAGE(image), bitmap.GetPixbuf());
+}
+
+wxBitmap wxButton::DoGetBitmap(State which) const
+{
+ return m_bitmaps[which];
+}
+
+void wxButton::DoSetBitmap(const wxBitmap& bitmap, State which)
+{
+ switch ( which )
+ {
+ case State_Normal:
+ if ( DontShowLabel() )
+ {
+ // we only have the bitmap in this button, never remove it but
+ // do invalidate the best size when the bitmap (and presumably
+ // its size) changes
+ InvalidateBestSize();
+ }
+#ifdef __WXGTK26__
+ // normal image is special: setting it enables images for the button and
+ // resetting it to nothing disables all of them
+ else if ( !gtk_check_version(2,6,0) )
+ {
+ GtkWidget *image = gtk_button_get_image(GTK_BUTTON(m_widget));
+ if ( image && !bitmap.IsOk() )
+ {
+ gtk_container_remove(GTK_CONTAINER(m_widget), image);
+ }
+ else if ( !image && bitmap.IsOk() )
+ {
+ image = gtk_image_new();
+ gtk_button_set_image(GTK_BUTTON(m_widget), image);
+ }
+ else // image presence or absence didn't change
+ {
+ // don't invalidate best size below
+ break;
+ }
+
+ InvalidateBestSize();
+ }
+#endif // GTK+ 2.6+
+ break;
+
+ case State_Pressed:
+ if ( bitmap.IsOk() )
+ {
+ if ( !m_bitmaps[which].IsOk() )
+ {
+ // we need to install the callbacks to be notified about
+ // the button pressed state change
+ g_signal_connect
+ (
+ m_widget,
+ "pressed",
+ G_CALLBACK(wxgtk_button_press_callback),
+ this
+ );
+
+ g_signal_connect
+ (
+ m_widget,
+ "released",
+ G_CALLBACK(wxgtk_button_released_callback),
+ this
+ );
+ }
+ }
+ else // no valid bitmap
+ {
+ if ( m_bitmaps[which].IsOk() )
+ {
+ // we don't need to be notified about the button pressed
+ // state changes any more
+ g_signal_handlers_disconnect_by_func
+ (
+ m_widget,
+ (gpointer)wxgtk_button_press_callback,
+ this
+ );
+
+ g_signal_handlers_disconnect_by_func
+ (
+ m_widget,
+ (gpointer)wxgtk_button_released_callback,
+ this
+ );
+
+ // also make sure we don't remain stuck in pressed state
+ if ( m_isPressed )
+ {
+ m_isPressed = false;
+ GTKUpdateBitmap();
+ }
+ }
+ }
+ break;
+
+ case State_Current:
+ // the logic here is the same as above for State_Pressed: we need
+ // to connect the handlers if we must be notified about the changes
+ // in the button current state and we disconnect them when/if we
+ // don't need them any more
+ if ( bitmap.IsOk() )
+ {
+ if ( !m_bitmaps[which].IsOk() )
+ {
+ g_signal_connect
+ (
+ m_widget,
+ "enter",
+ G_CALLBACK(wxgtk_button_enter_callback),
+ this
+ );
+
+ g_signal_connect
+ (
+ m_widget,
+ "leave",
+ G_CALLBACK(wxgtk_button_leave_callback),
+ this
+ );
+ }
+ }
+ else // no valid bitmap
+ {
+ if ( m_bitmaps[which].IsOk() )
+ {
+ g_signal_handlers_disconnect_by_func
+ (
+ m_widget,
+ (gpointer)wxgtk_button_enter_callback,
+ this
+ );
+
+ g_signal_handlers_disconnect_by_func
+ (
+ m_widget,
+ (gpointer)wxgtk_button_leave_callback,
+ this
+ );
+
+ if ( m_isCurrent )
+ {
+ m_isCurrent = false;
+ GTKUpdateBitmap();
+ }
+ }
+ }
+ break;
+
+ case State_Focused:
+ if ( bitmap.IsOk() )
+ {
+ Connect(wxEVT_SET_FOCUS,
+ wxFocusEventHandler(wxButton::GTKOnFocus));
+ Connect(wxEVT_KILL_FOCUS,
+ wxFocusEventHandler(wxButton::GTKOnFocus));
+ }
+ else // no valid focused bitmap
+ {
+ Disconnect(wxEVT_SET_FOCUS,
+ wxFocusEventHandler(wxButton::GTKOnFocus));
+ Disconnect(wxEVT_KILL_FOCUS,
+ wxFocusEventHandler(wxButton::GTKOnFocus));
+ }
+ break;
+
+ default:
+ // no callbacks to connect/disconnect
+ ;
+ }
projects / wxWidgets.git / blobdiff