Rewrote profile graph drawing code.

[apitrace] / gui / graphing / graphview.h

diff --git a/gui/graphing/graphview.h b/gui/graphing/graphview.h
new file mode 100644 (file)
index 0000000..6b881d4
--- /dev/null
+++ b/gui/graphing/graphview.h
@@ -0,0 +1,93 @@
+#ifndef GRAPHVIEW_H
+#define GRAPHVIEW_H
+
+#include "graphing.h"
+
+#include <QWidget>
+
+/**
+ * The generic base class for a graph's view, this is the component that
+ * displays the actual data for the graph.
+ *
+ * - Stores the view area within the graph
+ * - Simple user interaction such as translating and zooming with mouse
+ * - Selection tracking synchronised with axis
+ */
+class GraphView : public QWidget {
+    Q_OBJECT
+public:
+    GraphView(QWidget* parent = 0);
+    virtual ~GraphView(){}
+
+    virtual void update();
+
+    virtual void resizeEvent(QResizeEvent *);
+
+    virtual void wheelEvent(QWheelEvent *e);
+    virtual void mouseMoveEvent(QMouseEvent *e);
+    virtual void mousePressEvent(QMouseEvent *e);
+    virtual void mouseDoubleClickEvent(QMouseEvent *e);
+
+    virtual void setSelectionState(SelectionState* state);
+
+    void setHorizontalView(qint64 start, qint64 end);
+    void setVerticalView(qint64 start, qint64 end);
+
+protected:
+    void setDefaultView(qint64 min, qint64 max);
+
+signals:
+    void selectionChanged();
+
+    void verticalViewChanged(qint64 start, qint64 end);
+    void verticalRangeChanged(qint64 min, qint64 max);
+
+    void horizontalRangeChanged(qint64 min, qint64 max);
+    void horizontalViewChanged(qint64 start, qint64 end);
+
+protected:
+    /* Viewport area */
+    qint64 m_viewLeft;
+    qint64 m_viewRight;
+    qint64 m_viewBottom;
+    qint64 m_viewTop;
+
+    /* Graph limits */
+    qint64 m_graphLeft;
+    qint64 m_graphRight;
+    qint64 m_graphBottom;
+    qint64 m_graphTop;
+
+    /* Viewport width (m_viewRight - m_viewLeft), used for zoom */
+    qint64 m_viewWidth;
+    qint64 m_viewWidthMin;
+    qint64 m_viewWidthMax;
+
+    /* Viewport height (m_viewTop - m_viewBottom), used for zoom */
+    qint64 m_viewHeight;
+    qint64 m_viewHeightMin;
+    qint64 m_viewHeightMax;
+
+    /* Mouse tracking */
+    QPoint m_mousePressPosition;
+    qint64 m_mousePressViewLeft;
+    qint64 m_mousePressViewBottom;
+
+    /* Selection */
+    SelectionState* m_selectionState;
+
+    /* State from the last update() call */
+    struct PreviousUpdate {
+        qint64 m_viewLeft;
+        qint64 m_viewRight;
+        qint64 m_viewBottom;
+        qint64 m_viewTop;
+
+        qint64 m_graphLeft;
+        qint64 m_graphRight;
+        qint64 m_graphBottom;
+        qint64 m_graphTop;
+    } m_previous;
+};
+
+#endif