X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=video_widget.cpp;h=1d899d2507182f8f7c6d98cc206632101d97b85f;hb=d86834b0c2ecc2df21d70a7db8a2a9d949dccc74;hp=3cb5fa1faa38d8a33cd615d014e8ba1a6ebf96e4;hpb=3ea646d51ad82169f61354700d729c703d31c9d3;p=pkanalytics

diff --git a/video_widget.cpp b/video_widget.cpp
index 3cb5fa1..1d899d2 100644
--- a/video_widget.cpp
+++ b/video_widget.cpp
@@ -32,6 +32,7 @@ extern "C" {
 
 #include <QOpenGLFunctions>
 #include <QWheelEvent>
+#include <QMouseEvent>
 
 using namespace std;
 using namespace std::chrono;
@@ -493,6 +494,40 @@ void VideoWidget::wheelEvent(QWheelEvent *event)
 	fixup_zoom_matrix();
 }
 
+void VideoWidget::mousePressEvent(QMouseEvent *e)
+{
+	if (e->button() == Qt::LeftButton) {
+		dragging = true;
+		last_drag_x = e->position().x();
+		last_drag_y = e->position().y();
+	}
+}
+
+void VideoWidget::mouseReleaseEvent(QMouseEvent *e)
+{
+	if (e->button() == Qt::LeftButton) {
+		dragging = false;
+	}
+}
+
+void VideoWidget::mouseMoveEvent(QMouseEvent *e)
+{
+	if (!dragging) {
+		return;
+	}
+	float dx = (e->position().x() - last_drag_x) / width();
+	float dy = (e->position().y() - last_drag_y) / height();
+
+	//zoom_matrix[6] += dx * zoom_matrix[0];
+	//zoom_matrix[7] += dy * zoom_matrix[4];
+	zoom_matrix[6] += dx;
+	zoom_matrix[7] -= dy;
+	fixup_zoom_matrix();
+
+	last_drag_x = e->position().x();
+	last_drag_y = e->position().y();
+}
+
 // Normalize the matrix so that we never get skew or similar,
 // and also never can zoom or pan too far out.
 void VideoWidget::fixup_zoom_matrix()