From 9f33eb49ccb7fa8fb80f00865819beb499e70025 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sat, 29 Dec 2018 14:32:13 +0100
Subject: Zoom canvas using scroll-wheel.

---
 src/outputwindow.cc | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

(limited to 'src/outputwindow.cc')

diff --git a/src/outputwindow.cc b/src/outputwindow.cc
index 815da8c..b7b1a51 100644
--- a/src/outputwindow.cc
+++ b/src/outputwindow.cc
@@ -29,6 +29,7 @@
 
 #include <QPixmap>
 #include <QPainter>
+#include <QWheelEvent>
 
 #include <math.h>
 
@@ -72,7 +73,11 @@ void OutputWindow::loadPen(QString file)
 void OutputWindow::setScale(double s)
 {
 	scale = s;
-	sem.acquire();
+}
+
+double OutputWindow::getScale() const
+{
+	return scale;
 }
 
 void OutputWindow::setSpeed(int s)
@@ -107,11 +112,22 @@ void OutputWindow::timeout()
 	timer.start(25);
 }
 
+
+void OutputWindow::wheelEvent(QWheelEvent* event)
+{
+	double delta = event->delta() / 120.0 * scale;
+	scale += delta / 10.0;
+	printf("%f\n", scale);
+	if(scale < 0.3)
+	{
+		scale = 0.3;
+	}
+}
+
 void OutputWindow::paintEvent(QPaintEvent *)
 {
 	//sem.acquire();
 	QPainter p(this);
-	//QTransform tp; tp.scale(3, 3); p.setTransform(tp);
 
 	if(loadpen)
 	{
@@ -180,7 +196,6 @@ void OutputWindow::paintEvent(QPaintEvent *)
 
 void OutputWindow::reset()
 {
-	scale = 2.0;
 	speed = 50;
 	penfile = "gfx/kaiman.png";
 	loadpen = true;
-- 
cgit v1.2.3