Rewrote profile graph drawing code.

[apitrace] / gui / graphing / graphview.cpp

diff --git a/gui/graphing/graphview.cpp b/gui/graphing/graphview.cpp
new file mode 100644 (file)
index 0000000..6ecac57
--- /dev/null
+++ b/gui/graphing/graphview.cpp
@@ -0,0 +1,187 @@
+#include "graphview.h"
+
+#include <QMouseEvent>
+#include <QApplication>
+
+GraphView::GraphView(QWidget* parent) :
+    QWidget(parent),
+    m_selectionState(NULL),
+    m_viewLeft(0),
+    m_viewRight(0),
+    m_viewBottom(0),
+    m_viewTop(0),
+    m_graphLeft(0),
+    m_graphRight(0),
+    m_graphBottom(0),
+    m_graphTop(0),
+    m_viewWidth(0),
+    m_viewWidthMin(0),
+    m_viewWidthMax(0),
+    m_viewHeight(0),
+    m_viewHeightMin(0),
+    m_viewHeightMax(0)
+{
+    memset(&m_previous, -1, sizeof(m_previous));
+}
+
+void GraphView::update()
+{
+    if (m_graphLeft != m_previous.m_graphLeft || m_graphRight != m_previous.m_graphRight) {
+        m_previous.m_graphLeft = m_graphLeft;
+        m_previous.m_graphRight = m_graphRight;
+
+        emit horizontalRangeChanged(m_graphLeft, m_graphRight);
+    }
+
+    if (m_viewLeft != m_previous.m_viewLeft || m_viewRight != m_previous.m_viewRight) {
+        m_previous.m_viewLeft = m_viewLeft;
+        m_previous.m_viewRight = m_viewRight;
+
+        emit horizontalViewChanged(m_viewLeft, m_viewRight);
+    }
+
+    if (m_graphBottom != m_previous.m_graphBottom || m_graphTop != m_previous.m_graphTop) {
+        m_previous.m_graphBottom = m_graphBottom;
+        m_previous.m_graphTop = m_graphTop;
+
+        emit verticalRangeChanged(m_graphBottom, m_graphTop);
+    }
+
+    if (m_viewBottom != m_previous.m_viewBottom || m_viewTop != m_previous.m_viewTop) {
+        m_previous.m_viewBottom = m_viewBottom;
+        m_previous.m_viewTop = m_viewTop;
+
+        emit verticalViewChanged(m_viewBottom, m_viewTop);
+    }
+
+    QWidget::update();
+}
+
+void GraphView::resizeEvent(QResizeEvent *)
+{
+    m_viewHeight = height();
+    m_viewHeightMin = m_viewHeight;
+    m_viewHeightMax = m_viewHeight;
+
+    m_viewTop = m_viewBottom + m_viewHeight;
+
+    update();
+}
+
+void GraphView::wheelEvent(QWheelEvent *e)
+{
+    int zoomPercent = 10;
+
+    /* If holding Ctrl key then zoom 2x faster */
+    if (QApplication::keyboardModifiers() & Qt::ControlModifier) {
+        zoomPercent = 20;
+    }
+
+    /* Zoom view by adjusting width */
+    double dt = m_viewWidth;
+    double size = dt;
+    size *= -e->delta();
+
+    /* Zoom deltas normally come in increments of 120 */
+    size /= 120 * (100 / zoomPercent);
+
+    m_viewWidth += size;
+    m_viewWidth = qBound(m_viewWidthMin, m_viewWidth, m_viewWidthMax);
+
+    /* Scroll view to zoom around mouse */
+    dt -= m_viewWidth;
+    dt *= e->x();
+    dt /= width();
+
+    m_viewLeft = dt + m_viewLeft;
+    m_viewLeft = qBound(m_graphLeft, m_viewLeft, m_graphRight - m_viewWidth);
+    m_viewRight = m_viewLeft + m_viewWidth;
+
+    update();
+}
+
+void GraphView::mouseMoveEvent(QMouseEvent *e)
+{
+    if (e->buttons().testFlag(Qt::LeftButton)) {
+        /* Horizontal scroll */
+        double dvdx = m_viewWidth / (double)width();
+        dvdx *= m_mousePressPosition.x() - e->pos().x();
+
+        m_viewLeft = m_mousePressViewLeft + dvdx;
+        m_viewLeft = qBound(m_graphLeft, m_viewLeft, m_graphRight - m_viewWidth);
+        m_viewRight = m_viewLeft + m_viewWidth;
+
+        /* Vertical scroll */
+        double dvdy = m_viewHeight / (double)height();
+        dvdy *= m_mousePressPosition.y() - e->pos().y();
+
+        m_viewBottom = m_mousePressViewBottom + dvdy;
+        m_viewBottom = qBound(m_graphBottom, m_viewBottom, m_graphTop - m_viewHeight);
+        m_viewTop = m_viewBottom + m_viewHeight;
+
+        update();
+    }
+}
+
+void GraphView::mousePressEvent(QMouseEvent *e)
+{
+    m_mousePressPosition = e->pos();
+    m_mousePressViewLeft = m_viewLeft;
+    m_mousePressViewBottom = m_viewBottom;
+}
+
+void GraphView::mouseDoubleClickEvent(QMouseEvent *e)
+{
+    if (m_selectionState) {
+        m_selectionState->type = SelectionState::None;
+        emit selectionChanged();
+    }
+}
+
+void GraphView::setSelectionState(SelectionState* state)
+{
+    m_selectionState = state;
+}
+
+void GraphView::setHorizontalView(qint64 start, qint64 end)
+{
+    m_viewLeft = qBound(m_graphLeft, start, m_graphRight - (end - start));
+    m_viewRight = qBound(m_graphLeft, end, m_graphRight);
+    m_viewWidth = m_viewRight - m_viewLeft;
+    update();
+}
+
+void GraphView::setVerticalView(qint64 start, qint64 end)
+{
+    m_viewBottom = qBound(m_graphBottom, start, m_graphTop - (end - start));
+    m_viewTop = qBound(m_graphBottom, end, m_graphTop);
+    m_viewHeight = m_viewTop - m_viewBottom;
+    update();
+}
+
+void GraphView::setDefaultView(qint64 min, qint64 max)
+{
+    m_graphLeft = min;
+    m_graphRight = max;
+    m_viewWidth = max - min;
+
+    m_viewWidthMin = 1;
+    m_viewWidthMax = m_viewWidth;
+
+    m_viewLeft = min;
+    m_viewRight = max;
+
+    m_viewHeight = height();
+    m_viewHeightMin = m_viewHeight;
+    m_viewHeightMax = m_viewHeight;
+
+    m_viewBottom = 0;
+    m_viewTop = m_viewHeight;
+
+    m_graphBottom = 0;
+    m_graphTop = m_viewHeight;
+
+    update();
+}
+
+#include "graphview.moc"