Trace: Use scroll bars for popups with too much content

[pulseview.git] / pv / widgets / popup.cpp

diff --git a/pv/widgets/popup.cpp b/pv/widgets/popup.cpp
index 13282cda25e458b6b624de563f09e1fc6668a6b5..ec6d29c981c235b86451353ca620d9c5cf147868 100644 (file)
--- a/pv/widgets/popup.cpp
+++ b/pv/widgets/popup.cpp
@@ -23,6 +23,8 @@
 #include <QApplication>
 #include <QDesktopWidget>
 #include <QLineEdit>
+#include <QScrollBar>
+#include <QStyle>
 #include <QtGui>
 
 #include "popup.hpp"
@@ -37,6 +39,33 @@ const unsigned int Popup::ArrowLength = 10;
 const unsigned int Popup::ArrowOverlap = 3;
 const unsigned int Popup::MarginWidth = 6;
 
+
+QWidthAdjustingScrollArea::QWidthAdjustingScrollArea(QWidget* parent) :
+       QScrollArea(parent)
+{
+}
+
+void QWidthAdjustingScrollArea::setWidget(QWidget* w)
+{
+       QScrollArea::setWidget(w);
+       // It happens that QScrollArea already filters widget events,
+       // but that's an implementation detail that we shouldn't rely on.
+       w->installEventFilter(this);
+}
+
+bool QWidthAdjustingScrollArea::eventFilter(QObject* obj, QEvent* ev)
+{
+       if (obj == widget() && ev->type() == QEvent::Resize) {
+               if (widget()->height() > height())
+                       setMinimumWidth(widget()->width() + qApp->style()->pixelMetric(QStyle::PM_ScrollBarExtent));
+               else
+                       setMinimumWidth(widget()->width());
+       }
+
+       return QScrollArea::eventFilter(obj, ev);
+}
+
+
 Popup::Popup(QWidget *parent) :
        QWidget(parent, Qt::Popup | Qt::FramelessWindowHint),
        point_(),