fix more x errors due to using an invalid background

1 files changed, 5 insertions, 0 deletions

diff --git a/src/FbTk/FbWindow.cc b/src/FbTk/FbWindow.cc
index b996edc..090b788 100644
--- a/src/FbTk/FbWindow.cc
+++ b/src/FbTk/FbWindow.cc
@@ -153,6 +153,11 @@ void FbWindow::setBackgroundPixmap(Pixmap bg_pixmap) {
     updateBackground(false);
 }
 
+void FbWindow::invalidateBackground() {
+    m_lastbg_pm = None;
+    m_lastbg_color_set = false;
+}
+
 void FbWindow::updateBackground(bool only_if_alpha) {
     Pixmap newbg = m_lastbg_pm;
     unsigned char alpha = 255;