Community Core Vision

/*

 *  ofxGuiSlider.cpp

 *  openFrameworks

 *

 *  Created by Stefan Kirch on 18.06.08.

 *  Copyright 2008 alphakanal. All rights reserved.

 *

 */

//        ----------------------------------------------------------------------------------------------------

#include "ofxGuiSlider.h"

//        ----------------------------------------------------------------------------------------------------

ofxGuiSlider::ofxGuiSlider()

{

        mParamType = kofxGui_Object_Slider;

}

//        ----------------------------------------------------------------------------------------------------

void ofxGuiSlider::init(int id, string name, int x, int y, int width, int height, float min, float max, float value, int display, int steps)

{

        int        textHeight        = (name == "") ? 0 : mGlobals->mParamFontHeight;

        mParamId                = id;

        mParamName                = name;

        mObjX                        = x; 

        mObjY                        = y;

        mObjWidth                = width;

        mObjHeight                = textHeight + height;

        mDisplay                = display;

        mSteps                        = steps;

        setRange(min, max);

        setValue(value);

        setControlRegion(0, textHeight, width, height);

}

//        ----------------------------------------------------------------------------------------------------

void ofxGuiSlider::setValue(float value)

{

        if(mSteps > 1)

        {

                float        fraction        = valueToFraction(value);

                float        steps                = (float)mSteps - 1;

                float        slice                = roundInt(fraction * steps) / steps;

                value = mMinVal + mValDlt * slice;

        }

        mValue = value;        

}

//        ----------------------------------------------------------------------------------------------------

void ofxGuiSlider::setRange(float min, float max) 

{

        mMinVal        = min;

        mMaxVal        = max;

        mValDlt        = mMaxVal - mMinVal;

}

//        ----------------------------------------------------------------------------------------------------

bool ofxGuiSlider::update(int id, int task, void* data, int length)

{

        bool handled = false;

        if(id == mParamId)

        {

                if(task == kofxGui_Set_Float)

                {

                        setValue((float)*(int*)data);  // This hack is only for CCV original was *(float*)data

                }

                handled = true;

        }

        return handled;

}

//        ----------------------------------------------------------------------------------------------------

void ofxGuiSlider::draw()

{

        glPushMatrix();

                glTranslatef(mObjX, mObjY, 0.0);

                if(mParamName != "")

                        drawParamString(0.0, 0.0, mParamName + ": " + floatToString(mValue, mDisplay), false);

                float x = (mCtrWidth * valueToFraction(mValue));

                ofFill();

                //        background

                glColor4f(mGlobals->mCoverColor.r, mGlobals->mCoverColor.g, mGlobals->mCoverColor.b, mGlobals->mCoverColor.a);

                ofRect(mCtrX, mCtrY, mCtrWidth, mCtrHeight);

                //        action

                glColor4f(mGlobals->mSliderColor.r, mGlobals->mSliderColor.g, mGlobals->mSliderColor.b, mGlobals->mSliderColor.a);

                ofRect(mCtrX, mCtrY, x, mCtrHeight);

                //        handle

                glColor4f(mGlobals->mHandleColor.r, mGlobals->mHandleColor.g, mGlobals->mHandleColor.b, mGlobals->mHandleColor.a);

                ofRect(x, mCtrY, 1.0, mCtrHeight);

                ofNoFill();

                //        frame

                glColor4f(mGlobals->mFrameColor.r, mGlobals->mFrameColor.g, mGlobals->mFrameColor.b, mGlobals->mFrameColor.a);

                ofRect(mCtrX, mCtrY, mCtrWidth, mCtrHeight);

        glPopMatrix();

}

//        ----------------------------------------------------------------------------------------------------

bool ofxGuiSlider::mouseDragged(int x, int y, int button)

{

        if(mMouseIsDown)

        {

                float value = fractionToValue(mouseToFraction(mouseToLocal(x, y)).x);

                if(value != mValue)

                {

                        setValue(value);

                        mGlobals->mListener->handleGui(mParamId, kofxGui_Set_Float, &mValue, sizeof(float));

                }

        }

        return mMouseIsDown;

}

//        ----------------------------------------------------------------------------------------------------

bool ofxGuiSlider::mousePressed(int x, int y, int button)

{

        mMouseIsDown = isPointInsideMe(mouseToLocal(x, y));

        if (mMouseIsDown)

                mouseDragged(x, y, button);

        return mMouseIsDown;

}

//        ----------------------------------------------------------------------------------------------------

bool ofxGuiSlider::mouseReleased(int x, int y, int button)

{

        bool handled = mMouseIsDown;

        if(mMouseIsDown)

                mMouseIsDown = false;

        return handled;

}

//        ----------------------------------------------------------------------------------------------------

void ofxGuiSlider::buildFromXml()

{

        mGlobals->mListener->handleGui(mParamId, kofxGui_Set_Float, &mValue, sizeof(float));

}

//        ----------------------------------------------------------------------------------------------------

void ofxGuiSlider::saveToXml()

{

        int id = saveObjectData();

        mGlobals->mXml.setValue("OBJECT:MIN", mMinVal, id);

        mGlobals->mXml.setValue("OBJECT:MAX", mMaxVal, id);

        mGlobals->mXml.setValue("OBJECT:VALUE", mValue, id);

}

//        ----------------------------------------------------------------------------------------------------

float ofxGuiSlider::valueToFraction(float value)

{

        return (value - mMinVal) / mValDlt;

}

//        ----------------------------------------------------------------------------------------------------

float ofxGuiSlider::fractionToValue(float fraction)

{

        return (mValDlt * fraction) + mMinVal;

}

//        ----------------------------------------------------------------------------------------------------