Fix #717 by only updating the name widget when necessary

[pulseview.git] / pv / view / viewitempaintparams.cpp

diff --git a/pv/view/viewitempaintparams.cpp b/pv/view/viewitempaintparams.cpp
index 4edc30a35e6a13a96dc0e645b0e67b91d3349683..998045c8efdca9a2c189b89e64dde3edbef0e256 100644 (file)
--- a/pv/view/viewitempaintparams.cpp
+++ b/pv/view/viewitempaintparams.cpp
@@ -29,12 +29,11 @@ namespace pv {
 namespace view {
 
 ViewItemPaintParams::ViewItemPaintParams(
-       int left, int right, double scale, double offset) :
-       left_(left),
-       right_(right),
+       const QRect &rect, double scale, const pv::util::Timestamp& offset) :
+       rect_(rect),
        scale_(scale),
-       offset_(offset) {
-       assert(left <= right);
+       offset_(offset)
+{
        assert(scale > 0.0);
 }
 
@@ -43,9 +42,9 @@ QFont ViewItemPaintParams::font()
        return QApplication::font();
 }
 
-int ViewItemPaintParams::text_height() {
-       QFontMetrics m(font());
-       return m.boundingRect(QRect(), 0, "Tg").height();
+int ViewItemPaintParams::text_height()
+{
+       return QFontMetrics(font()).height();
 }
 
 } // namespace view