Add ResizeHandle to Scene.

include/window.hpp

@@ -60,6 +60,8 @@ struct Window {
 
 	Window();
 	~Window();
+	math::Vec getSize();
+	void setSize(math::Vec size);
 	void run();
 	void step();
 	/** Takes a screenshot of the screen and saves it to a PNG file. */

src/app/Scene.cpp

@@ -19,10 +19,6 @@ namespace rack {
 namespace app {
 
 
-struct Scene::Internal {
-};
-
-
 struct FrameRateWidget : widget::TransparentWidget {
 	void draw(const DrawArgs& args) override {
 		std::string text = string::f("%.2lf Hz", 1.0 / APP->window->getLastFrameDuration());
@@ -31,6 +27,35 @@ struct FrameRateWidget : widget::TransparentWidget {
 };
 
 
+struct ResizeHandle : widget::OpaqueWidget {
+	math::Vec size;
+
+	void draw(const DrawArgs& args) override {
+		nvgBeginPath(args.vg);
+		nvgMoveTo(args.vg, box.size.x, box.size.y);
+		nvgLineTo(args.vg, 0, box.size.y);
+		nvgLineTo(args.vg, box.size.x, 0);
+		nvgClosePath(args.vg);
+		nvgFillColor(args.vg, nvgRGBAf(1, 1, 1, 0.15));
+		nvgFill(args.vg);
+	}
+
+	void onDragStart(const DragStartEvent& e) override {
+		size = APP->window->getSize();
+	}
+
+	void onDragMove(const DragMoveEvent& e) override {
+		size = size.plus(e.mouseDelta);
+		APP->window->setSize(size.round());
+	}
+};
+
+
+struct Scene::Internal {
+	ResizeHandle* resizeHandle;
+};
+
+
 Scene::Scene() {
 	internal = new Internal;
 
@@ -54,6 +79,10 @@ Scene::Scene() {
 	// frameRateWidget->box.size = math::Vec(80.0, 30.0);
 	// frameRateWidget->hide();
 	// addChild(frameRateWidget);
+
+	internal->resizeHandle = new ResizeHandle;
+	internal->resizeHandle->box.size = math::Vec(15, 15);
+	addChild(internal->resizeHandle);
 }
 
 Scene::~Scene() {
@@ -73,6 +102,8 @@ void Scene::step() {
 
 	// frameRateWidget->box.pos.x = box.size.x - frameRateWidget->box.size.x;
 
+	internal->resizeHandle->box.pos = box.size.minus(internal->resizeHandle->box.size);
+
 	// Resize owned descendants
 	menuBar->box.size.x = box.size.x;
 	rackScroll->box.size = box.size.minus(rackScroll->box.pos);

src/window.cpp

@@ -26,6 +26,9 @@
 namespace rack {
 
 
+static const math::Vec minWindowSize = math::Vec(640, 480);
+
+
 void Font::loadFile(const std::string& filename, NVGcontext* vg) {
 	this->vg = vg;
 	handle = nvgCreateFont(vg, filename.c_str(), filename.c_str());
@@ -240,7 +243,7 @@ Window::Window() {
 	glfwGetWindowContentScale(win, &contentScale, NULL);
 	INFO("Window content scale: %f", contentScale);
 
-	glfwSetWindowSizeLimits(win, 640, 480, GLFW_DONT_CARE, GLFW_DONT_CARE);
+	glfwSetWindowSizeLimits(win, minWindowSize.x, minWindowSize.y, GLFW_DONT_CARE, GLFW_DONT_CARE);
 	if (settings::windowSize.isZero()) {
 		glfwMaximizeWindow(win);
 	}
@@ -342,6 +345,19 @@ Window::~Window() {
 }
 
 
+math::Vec Window::getSize() {
+	int width, height;
+	glfwGetWindowSize(win, &width, &height);
+	return math::Vec(width, height);
+}
+
+
+void Window::setSize(math::Vec size) {
+	size = size.max(minWindowSize);
+	glfwSetWindowSize(win, size.x, size.y);
+}
+
+
 void Window::run() {
 	internal->frame = 0;
 	while (!glfwWindowShouldClose(win)) {