Rewrote profile graph drawing code.

[apitrace] / gui / graphing / histogramview.h

diff --git a/gui/graphing/histogramview.h b/gui/graphing/histogramview.h
new file mode 100644 (file)
index 0000000..563d664
--- /dev/null
+++ b/gui/graphing/histogramview.h
@@ -0,0 +1,41 @@
+#ifndef HISTOGRAMVIEW_H
+#define HISTOGRAMVIEW_H
+
+#include "graphview.h"
+
+/**
+ * Histogram graph view.
+ *
+ * When the view is zoomed such that there is more than one item occupying
+ * a single pixel the one with the highest value will be displayed.
+ */
+class HistogramView : public GraphView {
+public:
+    HistogramView(QWidget* parent);
+
+    void setDataProvider(GraphDataProvider* data);
+    void setSelectionState(SelectionState* state);
+
+    /* Gradient colours for selected and unselected items */
+    void setSelectedGradient(const QLinearGradient& gradient);
+    void setUnelectedGradient(const QLinearGradient& gradient);
+
+    virtual void mouseMoveEvent(QMouseEvent *e);
+    virtual void mouseDoubleClickEvent(QMouseEvent *e);
+
+    virtual void update();
+    virtual void resizeEvent(QResizeEvent *e);
+    virtual void paintEvent(QPaintEvent *e);
+
+protected:
+    qint64 itemAtPosition(QPoint pos);
+    qint64 valueAtPosition(QPoint pos);
+
+protected:
+    QLinearGradient m_gradientSelected;
+    QLinearGradient m_gradientUnselected;
+
+    GraphDataProvider* m_data;
+};
+
+#endif