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/*
 *  ofxSimpleSlider.cpp
 *  Created by Golan Levin on 2/24/12.
 *
 */

#include "ofxSimpleSlider.h"

//----------------------------------------------------
ofxSimpleSlider::ofxSimpleSlider(){
	bWasSetup = false;
}

//----------------------------------------------------
ofxSimpleSlider::~ofxSimpleSlider(){
	clear();
}

//-----------------------------------------------------------------------------------------------------------------------
void ofxSimpleSlider::setup(float inx, float iny, float inw, float inh, float loVal, float hiVal, float initialValue, bool bVert, bool bDrawNum){
	x = inx;
	y = iny; 
	width = inw; 
	height = inh;
	box.set(x,y, width, height); 
	numberDisplayPrecision = 2;
	
	bVertical = bVert;
	bDrawNumber = bDrawNum;
	bHasFocus = false;

	lowValue = loVal;
	highValue = hiVal;
	percent = ofMap(initialValue, lowValue,highValue, 0,1); 
	percent = ofClamp(percent, 0,1);
	
	labelString = ""; 
	
	if(!bWasSetup){
		ofAddListener(ofEvents().draw, this, &ofxSimpleSlider::draw);
		ofAddListener(ofEvents().mouseMoved, this, &ofxSimpleSlider::mouseMoved);
		ofAddListener(ofEvents().mousePressed, this, &ofxSimpleSlider::mousePressed);
		ofAddListener(ofEvents().mouseReleased, this, &ofxSimpleSlider::mouseReleased);
		ofAddListener(ofEvents().mouseDragged, this, &ofxSimpleSlider::mouseDragged);
		bWasSetup = true;
	}
}

//----------------------------------------------------
void ofxSimpleSlider::clear(){
	if(bWasSetup){
		ofRemoveListener(ofEvents().draw, this, &ofxSimpleSlider::draw);
		ofRemoveListener(ofEvents().mouseMoved, this, &ofxSimpleSlider::mouseMoved);
		ofRemoveListener(ofEvents().mousePressed, this, &ofxSimpleSlider::mousePressed);
		ofRemoveListener(ofEvents().mouseReleased, this, &ofxSimpleSlider::mouseReleased);
		ofRemoveListener(ofEvents().mouseDragged, this, &ofxSimpleSlider::mouseDragged);
	}
	bWasSetup = false;
}

//----------------------------------------------------
void ofxSimpleSlider::setLabelString (string str){
	labelString = str;
}


//----------------------------------------------------
void ofxSimpleSlider::draw(ofEventArgs& event){
	
	ofPushStyle();
	ofEnableAlphaBlending();
	ofDisableSmoothing();
	ofPushMatrix();
	ofTranslate(x,y,0);
	
	// Use different alphas if we're actively maniupulating me. 
	float sliderAlpha = (bHasFocus) ? 128:64;
	float spineAlpha  = (bHasFocus) ? 192:128;
	float thumbAlpha  = (bHasFocus) ? 255:160;
	
	// draw box outline
	ofNoFill();
	ofSetLineWidth(1.0);
	ofSetColor(64,64,64, sliderAlpha); 
	ofDrawRectangle(0,0, width,height); 
	
	// draw spine
	ofSetLineWidth(1.0);
	ofSetColor(0,0,0, spineAlpha); 
	if (bVertical){
		ofDrawLine(width/2,0, width/2,height); 
	} else {
		ofDrawLine(0,height/2, width,height/2); 
	}
	
	// draw thumb
	ofSetLineWidth(5.0);
	ofSetColor(0,0,0, thumbAlpha);
	if (bVertical){
		float thumbY = ofMap(percent, 0,1, height,0, true);
		ofDrawLine(0,thumbY, width,thumbY); 
	} else {
		float thumbX = ofMap(percent, 0,1, 0,width, true);
		ofDrawLine(thumbX,0, thumbX,height); 
	}
	
	// draw numeric value 
	if (bHasFocus){
		ofSetColor(0); 
	} else {
		ofSetColor(128); 
	}
	if (bVertical){
		ofDrawBitmapString( ofToString(getValue(),numberDisplayPrecision), width+5,height);
	} else {
		ofDrawBitmapString( ofToString(getValue(),numberDisplayPrecision), width+5,height/2 + 4);
		
		float labelStringWidth = labelString.size();
		ofDrawBitmapString( labelString, 0-labelStringWidth*8-5, height/2 + 4); 
	}	

	ofPopMatrix();
	ofPopStyle();
}

//----------------------------------------------------
float ofxSimpleSlider::getValue(){
	// THIS IS THE MAIN WAY YOU GET THE VALUE FROM THE SLIDER!
	float out = ofMap(percent, 0,1, lowValue,highValue, true); 
	return out;
}


//----------------------------------------------------
// Probably not used very much. 
float ofxSimpleSlider::getLowValue(){
	return lowValue;
}
float ofxSimpleSlider::getHighValue(){
	return highValue;
}
float ofxSimpleSlider::getPercent(){
	return percent;
}

//----------------------------------------------------
// Probably not used very much. 
void ofxSimpleSlider::setLowValue(float lv){
	lowValue = lv;
}
void ofxSimpleSlider::setHighValue(float hv){
	highValue = hv; 
}
void ofxSimpleSlider::setPercent (float p){
	// Set the slider's percentage from the outside. 
	p = ofClamp(p, 0,1);
	percent	= p;
}
void ofxSimpleSlider::setNumberDisplayPrecision(int prec){
	numberDisplayPrecision = prec;
}
		
//----------------------------------------------------
void ofxSimpleSlider::mouseMoved(ofMouseEventArgs& event){
	bHasFocus = false;
}
void ofxSimpleSlider::mouseDragged(ofMouseEventArgs& event){
	if (bHasFocus){
		updatePercentFromMouse (event.x, event.y); 
	}
}
void ofxSimpleSlider::mousePressed(ofMouseEventArgs& event){
	bHasFocus = false;
	if (box.inside(event.x, event.y)){
		bHasFocus = true;
		updatePercentFromMouse (event.x, event.y); 
	}
}
void ofxSimpleSlider::mouseReleased(ofMouseEventArgs& event){
	if (bHasFocus){
		if (box.inside(event.x, event.y)){
			updatePercentFromMouse (event.x, event.y); 
		}
	}
	bHasFocus = false;
}

//----------------------------------------------------
void ofxSimpleSlider::updatePercentFromMouse (int mx, int my){
	// Given the mouse value, compute the percentage.
	if (bVertical){
		percent = ofMap(my, y, y+height, 1,0, true);
	} else {
		percent = ofMap(mx, x, x+width,  0,1, true);
	}
}