made all keyframes editable and undoable

panels/effectcontrols.cpp

@@ -89,6 +89,10 @@ void EffectControls::update_keyframes() {
 	ui->keyframeView->update();
 }
 
+void EffectControls::delete_selected_keyframes() {
+	ui->keyframeView->delete_selected_keyframes();
+}
+
 void EffectControls::show_effect_menu(bool video, bool transitions) {
     video_menu = video;
 	transition_menu = transitions;

panels/effectcontrols.h

@@ -38,6 +38,7 @@ public:
     void reload_clips();
 	void set_zoom(bool in);
 	bool keyframe_focus();
+	void delete_selected_keyframes();
 
 	double zoom;
 public slots:

panels/timeline.cpp

@@ -22,12 +22,19 @@
 #include <QtMath>
 #include <QGuiApplication>
 #include <QScreen>
+#include <QPainter>
 
 long refactor_frame_number(long framenumber, double source_frame_rate, double target_frame_rate) {
     if (source_frame_rate == target_frame_rate) return framenumber;
     return qRound(((double)framenumber/source_frame_rate)*target_frame_rate);
 }
 
+void draw_selection_rectangle(QPainter& painter, const QRect& rect) {
+	painter.setPen(QColor(204, 204, 204));
+	painter.setBrush(QColor(0, 0, 0, 32));
+	painter.drawRect(rect);
+}
+
 Timeline::Timeline(QWidget *parent) :
     QDockWidget(parent),
     playhead(0),

panels/timeline.h

@@ -24,6 +24,7 @@ int lerp(int a, int b, double t);
 long refactor_frame_number(long framenumber, double source_frame_rate, double target_frame_rate);
 int getScreenPointFromFrame(double zoom, long frame);
 long getFrameFromScreenPoint(double zoom, int x);
+void draw_selection_rectangle(QPainter& painter, const QRect& rect);
 
 struct Ghost {
     int clip;