various scrolling fixes for the effect keyframes

panels/effectcontrols.cpp

@@ -11,6 +11,7 @@
 #include <QLabel>
 #include <QVBoxLayout>
 #include <QIcon>
+#include <QApplication>
 
 #include "panels/panels.h"
 #include "project/effect.h"
@@ -52,6 +53,7 @@ EffectControls::EffectControls(QWidget *parent) :
 
 	lblMultipleClipsSelected->setVisible(false);
 
+    connect(keyframeView, SIGNAL(wheel_event_signal(QWheelEvent*)), effects_area, SLOT(receive_wheel_event(QWheelEvent*)));
 	connect(horizontalScrollBar, SIGNAL(valueChanged(int)), headers, SLOT(set_scroll(int)));
 	connect(horizontalScrollBar, SIGNAL(resize_move(double)), keyframeView, SLOT(resize_move(double)));
 	connect(horizontalScrollBar, SIGNAL(valueChanged(int)), keyframeView, SLOT(set_x_scroll(int)));
@@ -439,7 +441,17 @@ void EffectControls::setup_ui() {
 
 	hlayout->addWidget(splitter);
 
-	setWidget(contents);
+    setWidget(contents);
+}
+
+void EffectControls::update_scrollbar() {
+    verticalScrollBar->setMaximum(qMax(0, effects_area->height() - keyframeView->height() - headers->height()));
+    verticalScrollBar->setPageStep(verticalScrollBar->height());
+}
+
+void EffectControls::queue_post_update() {
+    keyframeView->update();
+    update_scrollbar();
 }
 
 void EffectControls::load_effects() {
@@ -469,10 +481,10 @@ void EffectControls::load_effects() {
 		}
 		if (selected_clips.size() > 0) {
 			setWindowTitle(panel_name + sequence->clips.at(selected_clips.at(0))->name);
-			verticalScrollBar->setMaximum(qMax(0, effects_area->sizeHint().height() - headers->height() + scrollArea->horizontalScrollBar()->height()/* - keyframeView->height() - headers->height()*/));
 			keyframeView->setEnabled(true);
 			headers->setVisible(true);
-			keyframeView->update();
+
+            QTimer::singleShot(50, this, SLOT(queue_post_update()));
 		}
 	}
 }
@@ -532,7 +544,7 @@ void EffectControls::audio_transition_click() {
 }
 
 void EffectControls::resizeEvent(QResizeEvent*) {
-	verticalScrollBar->setMaximum(qMax(0, effects_area->height() - keyframeView->height() - headers->height()));
+    update_scrollbar();
 }
 
 bool EffectControls::is_focused() {
@@ -556,8 +568,6 @@ EffectsArea::EffectsArea(QWidget* parent) :
 	QWidget(parent)
 {}
 
-void EffectsArea::resizeEvent(QResizeEvent*) {
-//    parent_widget->setMinimumWidth(sizeHint().width());
-//    parent_widget->resize(sizeHint().width(), parent_widget->height());
-//    parent_widget->updateGeometry();
+void EffectsArea::receive_wheel_event(QWheelEvent *e) {
+    QApplication::sendEvent(this, e);
 }

panels/effectcontrols.h

@@ -19,12 +19,14 @@ class QScrollBar;
 class QHBoxLayout;
 
 class EffectsArea : public QWidget {
+    Q_OBJECT
 public:
-	EffectsArea(QWidget* parent = 0);
-	void resizeEvent(QResizeEvent *event);
+    EffectsArea(QWidget* parent = 0);
 	QScrollArea* parent_widget;
 	KeyframeView* keyframe_area;
 	TimelineHeader* header;
+public slots:
+    void receive_wheel_event(QWheelEvent* e);
 };
 
 class EffectControls : public QDockWidget
@@ -65,6 +67,9 @@ private slots:
 	void audio_transition_click();
 
 	void deselect_all_effects(QWidget*);
+
+    void update_scrollbar();
+    void queue_post_update();
 protected:
 	void resizeEvent(QResizeEvent *event);
 private:

ui/keyframeview.cpp

@@ -167,7 +167,11 @@ void KeyframeView::paintEvent(QPaintEvent*) {
 
 	/*if (mouseover && mouseover_row < rowY.size()) {
 		draw_keyframe(p, getScreenPointFromFrame(panel_effect_controls->zoom, mouseover_frame - visible_in), rowY.at(mouseover_row), true);
-	}*/
+    }*/
+}
+
+void KeyframeView::wheelEvent(QWheelEvent *e) {
+    emit wheel_event_signal(e);
 }
 
 bool KeyframeView::keyframeIsSelected(EffectField *field, int keyframe) {

ui/keyframeview.h

@@ -21,6 +21,8 @@ public:
 
 	long visible_in;
 	long visible_out;
+signals:
+    void wheel_event_signal(QWheelEvent*);
 public slots:
 	void set_x_scroll(int);
 	void set_y_scroll(int);
@@ -36,6 +38,7 @@ private:
 	void mouseMoveEvent(QMouseEvent* event);
 	void mouseReleaseEvent(QMouseEvent *event);
 	void paintEvent(QPaintEvent *event);
+    void wheelEvent(QWheelEvent* e);
 	bool mousedown;
 	bool dragging;
 	bool keys_selected;