Add `ScaleWidget` based on `GuiBaseWidget`

src/Application/GuiBaseWidget.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "ofEvents.h"
+
+namespace ofx {
+namespace piMapper {
+
+class GuiBaseWidget {
+	public:
+		virtual void setup() = 0;
+		virtual void update() = 0;
+		virtual void draw() = 0;
+	
+		virtual void onMousePressed(ofMouseEventArgs & e) = 0;
+		virtual void onMouseReleased(ofMouseEventArgs & e) = 0;
+		virtual void onMouseDragged(ofMouseEventArgs & e) = 0;
+	
+		virtual bool inside(float x, float y) = 0;
+};
+
+} // namespace piMapper
+} // namespace ofx

src/Application/ScaleWidget.cpp

@@ -0,0 +1,74 @@
+#include "ScaleWidget.h"
+
+namespace ofx {
+namespace piMapper {
+
+ScaleWidget::ScaleWidget(){
+	_line.addVertex(ofPoint(0, 0));
+	_line.addVertex(ofPoint(0, 0));
+	
+	_handle.width = 20;
+	_handle.height = 20;
+}
+
+void ScaleWidget::setup(){
+
+}
+
+void ScaleWidget::update(){
+
+}
+
+void ScaleWidget::draw(){
+	ofPushStyle();
+
+	ofSetColor(255, 255, 255);
+	ofNoFill();
+	
+	ofSetLineWidth(1);
+	_line.draw();
+	
+	ofSetLineWidth(2);
+	ofDrawRectangle(_handle);
+	
+	ofPopStyle();
+}
+
+void ScaleWidget::onMousePressed(ofMouseEventArgs & e){
+	if(_handle.inside(e.x, e.y)){
+		std::cout << "Handle clicked" << std::endl;
+		_dragging = true;
+	}
+}
+
+void ScaleWidget::onMouseReleased(ofMouseEventArgs & e){
+	_dragging = false;
+}
+
+void ScaleWidget::onMouseDragged(ofMouseEventArgs & e){
+	if(_dragging){
+		_handle.x = e.x;
+		_handle.y = e.y;
+	}
+}
+
+bool ScaleWidget::inside(float x, float y){
+	ofPoint p = ofPoint(x, y);
+	return _handle.inside(p);
+}
+
+void ScaleWidget::setRect(ofRectangle rect){
+	ofPoint center = rect.getCenter();
+	
+	_line.getVertices()[0].x = center.x;
+	_line.getVertices()[0].y = center.y;
+	
+	_line.getVertices()[1].x = rect.x + rect.width;
+	_line.getVertices()[1].y = rect.y;
+	
+	_handle.x = rect.x + rect.width;
+	_handle.y = rect.y;
+}
+
+} // namespace piMapper
+} // namespace ofx

src/Application/ScaleWidget.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include "ofRectangle.h"
+#include "ofPolyline.h"
+#include "GuiBaseWidget.h"
+#include "ofGraphics.h"
+
+namespace ofx {
+namespace piMapper {
+
+class ScaleWidget : GuiBaseWidget {
+	public:
+		ScaleWidget();
+	
+		void setup();
+		void update();
+		void draw();
+	
+		void onMousePressed(ofMouseEventArgs & e);
+		void onMouseReleased(ofMouseEventArgs & e);
+		void onMouseDragged(ofMouseEventArgs & e);
+	
+		bool inside(float x, float y);
+	
+		// This should be the size of the objet's bounding box
+		void setRect(ofRectangle rect);
+
+	private:
+		ofRectangle _handle;
+	
+		ofPolyline _line;
+	
+		bool _dragging;
+};
+
+} // namespace piMapper
+} // namespace ofx