gistfile1.txt

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup(){
	ofxAssets::AssetRegister.addAddon("ofxCvGui");
	ofSetWindowShape(512, 512);
	ofSetFrameRate(60.0f);
	
	this->x = 50.0f;
	this->min = 0.0f;
	this->max = 100.0f;
	this->caption = "Tilt";
	this->units = "%";
	
	this->zoom = 1.0f;
	this->startMouseHoldTime = 0;
	this->mouseHoldState = None;
	
	{
		auto & marker = this->marker;
		marker.addVertex(-5, -10);
		marker.addVertex(-5, -5);
		marker.addVertex(0, 0);
		marker.addVertex(+5, -5);
		marker.addVertex(+5, -10);
		marker.bezierTo(+5, -25, +5, -25, 0, -25);
		marker.bezierTo(-5, -25, -5, -25, -5, -10);
		marker.close();
		marker.setClosed(true);
	}
	
	{
		auto & ticks = this->ticks;
		for(float x = 0.0f; x<= 1.0f; x+= 0.01f) {
			ticks.addVertex(ofVec3f(x, 0.0f, 0.0f));
		}
		ticks.setMode(OF_PRIMITIVE_POINTS);
	}
	this->width = 300.0f;
	this->editBounds = ofRectangle(width - 16,1,15, 15);
}

//--------------------------------------------------------------
void ofApp::update(){
	this->x = ofClamp(this->x, this->min, this->max);
	if(this->mouseHoldState == Holding) {
		const auto mouseHoldTime = float(ofGetElapsedTimeMillis() - startMouseHoldTime) / 1000.0f;
		if (mouseHoldTime > 1.0f) {
			zoom = mouseHoldTime;
		}
	} else if (this->mouseHoldState == None) {
		zoom = (zoom - 1.0f) * 0.9f + 1.0f;
	}
}

//--------------------------------------------------------------
void ofApp::draw(){
	ofBackground(50);
	
	auto & font = ofxAssets::AssetRegister.getFont("ofxCvGui::swisop3", 12);
	ofxAssets::AssetRegister.getImage("ofxCvGui::edit").draw(this->editBounds);
	font.drawString(this->caption + " : " + ofToString(x) + this->units, 5, 15);
	
	const auto center = this->startMouseHoldX;
	const auto centerPx = ofMap(center, this->min, this->max, 0, this->width);
	const auto xPx = (this->x - center) * (zoom * width) / (this->max - this->min)+ centerPx;
	
	ofPushMatrix();
	ofTranslate(0.0f, 40.0f);

	ofPushMatrix();
	ofTranslate(xPx, 0.0f);
	this->marker.draw();
	ofPopMatrix();
	

	ofTranslate(+centerPx, 0.0f);
	ofScale(zoom, 1.0f);
	ofTranslate(-centerPx, 0.0f);
	ofScale(width, 1.0f);
	this->ticks.draw();
	
	ofPopMatrix();
}

//--------------------------------------------------------------
void ofApp::keyPressed(int key){

}

//--------------------------------------------------------------
void ofApp::keyReleased(int key){

}

//--------------------------------------------------------------
void ofApp::mouseMoved(int x, int y ){

}

//--------------------------------------------------------------
void ofApp::mouseDragged(int x, int y, int button){
	this->mouseHoldState = Dragging;

	float dNormX = (x - this->startMouseHoldMouseX) / (this->width * zoom);
	this->x = dNormX * (this->max - this->min) + startMouseHoldX;
}

//--------------------------------------------------------------
void ofApp::mousePressed(int x, int y, int button){
	if (y > 15) {
		if (ofGetElapsedTimeMillis() - startMouseHoldTime < 500) {
			this->x = ofMap(x, 0, this->width, this->min, this->max, true);
		}
		this->startMouseHoldTime = ofGetElapsedTimeMillis();
		this->startMouseHoldX = this->x;
		this->startMouseHoldMouseX = x;
		this->mouseHoldState = Holding;
	} else if (this->editBounds.inside(x, y)) {
		auto result = ofSystemTextBoxDialog(this->caption + " (" + ofToString(this->x) + ")");
		if (!result.empty()) {
			this->x = ofToFloat(result);
		}
	}
}

//--------------------------------------------------------------
void ofApp::mouseReleased(int x, int y, int button){
	this->mouseHoldState = None;
}

//--------------------------------------------------------------
void ofApp::windowResized(int w, int h){

}

//--------------------------------------------------------------
void ofApp::gotMessage(ofMessage msg){

}

//--------------------------------------------------------------
void ofApp::dragEvent(ofDragInfo dragInfo){ 

}