Added image export functionality.

4 files changed, 113 insertions, 40 deletions

diff --git a/src/mainwindow.cc b/src/mainwindow.cc
index e52b9f3..298c811 100644
--- a/src/mainwindow.cc
+++ b/src/mainwindow.cc
@@ -117,6 +117,11 @@ MainWindow::MainWindow(QString p)
 		connect(act, SIGNAL(triggered()), this, SLOT(reset()));
 	}
 
+	{
+		QAction *act = toolbar->addAction("Image");
+		connect(act, SIGNAL(triggered()), this, SLOT(image()));
+	}
+
 	loadSettings();
 
 	statusBar()->showMessage(tr("Ready"));
@@ -356,6 +361,28 @@ void MainWindow::reset()
 	out->reset();
 }
 
+void MainWindow::image()
+{
+	QString filename
+		= QFileDialog::getSaveFileName(this, tr("Save Kaiman File"),
+		                               "",
+		                               tr("Image Files (*.png)"));
+
+	if(filename == "")
+	{
+		// User clicked cancel
+		return;
+	}
+
+	if(filename.right(4) != ".png")
+	{
+		filename += ".png";
+	}
+
+	auto image = out->acquire(true);
+	image.save(filename);
+}
+
 void MainWindow::programChanged()
 {
 	dirty = true;
diff --git a/src/mainwindow.h b/src/mainwindow.h
index 5943301..2be4731 100644
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -57,6 +57,7 @@ private slots:
 	void stop();
 	void start();
 	void reset();
+	void image();
 
 	void programChanged();
 
diff --git a/src/outputwindow.cc b/src/outputwindow.cc
index b7b1a51..8c4cb7b 100644
--- a/src/outputwindow.cc
+++ b/src/outputwindow.cc
@@ -48,16 +48,6 @@ OutputWindow::OutputWindow()
 	reset();
 }
 
-double OutputWindow::coordX()
-{
-	return x;
-}
-
-double OutputWindow::coordY()
-{
-	return y;
-}
-
 void OutputWindow::stopScript()
 {
 	stop = true;
@@ -103,6 +93,50 @@ void OutputWindow::setColour(int r, int g, int b, int a)
 	sem.acquire();
 }
 
+double OutputWindow::coordX()
+{
+	return x;
+}
+
+double OutputWindow::coordY()
+{
+	return y;
+}
+
+QImage OutputWindow::acquire(bool includePen)
+{
+	double scale = 2.0;
+
+	// Minimum picture size is 32x32
+	double minx = -16;
+	double miny = -16;
+	double maxx = 16;
+	double maxy = 16;
+	for(const auto& line : lines)
+	{
+		maxx = std::max(line.line.p1().x() * scale, maxx);
+		maxx = std::max(line.line.p2().x() * scale, maxx);
+		maxy = std::max(line.line.p1().y() * scale, maxy);
+		maxy = std::max(line.line.p2().y() * scale, maxy);
+
+		minx = std::min(line.line.p1().x() * scale, minx);
+		minx = std::min(line.line.p2().x() * scale, minx);
+		miny = std::min(line.line.p1().y() * scale, miny);
+		miny = std::min(line.line.p2().y() * scale, miny);
+	}
+
+	int border = 100 * scale;
+	int width = maxx - minx + border*2;
+	int height = maxy - miny + border*2;
+
+	QImage img({width, height}, QImage::Format_ARGB32);
+	img.fill(QColor(0,0,0,0));
+	QPainter painter(&img);
+	paint(painter, {-minx + border, -miny + border}, includePen, scale);
+
+	return img;
+}
+
 void OutputWindow::timeout()
 {
 	//x++;
@@ -112,12 +146,28 @@ void OutputWindow::timeout()
 	timer.start(25);
 }
 
+void OutputWindow::reset()
+{
+	speed = 50;
+	penfile = "gfx/kaiman.png";
+	loadpen = true;
+
+	lines.clear();
+	current_points.clear();
+	x = 0;
+	y = 0;
+	r = 0;
+	colour = QColor(150, 0, 0, 150);
+	stop = false;
+	while(sem.tryAcquire())
+	{
+	}
+}
 
 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;
@@ -127,8 +177,14 @@ void OutputWindow::wheelEvent(QWheelEvent* event)
 void OutputWindow::paintEvent(QPaintEvent *)
 {
 	//sem.acquire();
-	QPainter p(this);
+	QPainter painter(this);
+	paint(painter, {width() / 2.0, height() / 2.0}, true, scale);
+	sem.release();
+}
 
+void OutputWindow::paint(QPainter& p, const QPointF& offset,
+                         bool includePen, double scale)
+{
 	if(loadpen)
 	{
 		QPixmap img(penfile);
@@ -136,16 +192,21 @@ void OutputWindow::paintEvent(QPaintEvent *)
 		loadpen = false;
 	}
 
-	QTransform t;
-	t.rotate(-r + 90);
-	t.scale((100.0 / kaiman.width() * scale),
-	        (100.0 / kaiman.width() * scale) );
-	QImage img = kaiman.transformed(t, Qt::SmoothTransformation);
-	p.drawImage((x * scale) - img.width()/2 + width() / 2,
-	            (y * scale) - img.height()/2 + height() / 2, img);
+	if(includePen)
+	{
+		QTransform t;
+		t.rotate(-r + 90);
+		auto m = std::max(kaiman.width(),kaiman.height());
+		t.scale((100.0 / m * scale),
+		        (100.0 / m * scale) );
+		QImage img = kaiman.transformed(t, Qt::SmoothTransformation);
+		p.drawImage((x * scale) - img.width()/2 + offset.x(),
+		            (y * scale) - img.height()/2 + offset.y(),
+		            img);
+	}
 
 	QTransform gt;
-	gt.translate(width() / 2, height() / 2);
+	gt.translate(offset.x(), offset.y());
 	gt.scale(scale, scale);
 	p.setTransform(gt);
 
@@ -190,26 +251,6 @@ void OutputWindow::paintEvent(QPaintEvent *)
 		QPointF p2 = current_points[i + 1];
 		p.drawLine(QLineF(p1, p2));
 	}
-
-	sem.release();
-}
-
-void OutputWindow::reset()
-{
-	speed = 50;
-	penfile = "gfx/kaiman.png";
-	loadpen = true;
-
-	lines.clear();
-	current_points.clear();
-	x = 0;//(width() / 2) / scale;
-	y = 0;//(height() / 2) / scale;
-	r = 0;
-	colour = QColor(150, 0, 0, 150);
-	stop = false;
-	while(sem.tryAcquire())
-	{
-	}
 }
 
 static inline int sign(int x)
diff --git a/src/outputwindow.h b/src/outputwindow.h
index fc63a44..bb7ef7b 100644
--- a/src/outputwindow.h
+++ b/src/outputwindow.h
@@ -58,6 +58,8 @@ public:
 	double coordX();
 	double coordY();
 
+	QImage acquire(bool includePen);
+
 public slots:
 	void timeout();
 	void reset();
@@ -67,6 +69,8 @@ protected:
 	void paintEvent(QPaintEvent* event);
 
 private:
+	void paint(QPainter& p, const QPointF& offset, bool includePen, double scale);
+
 	class ColLine
 	{
 	public: