#include "ImageSwitch.h"

#include <qpainter.h>
#include <qdebug.h>


namespace{
    const int DEFAULT_WIDTH = 100;
    const int DEFAULT_HEIGHT = 50;
    const char * const OFF_FILE_PATH = ":/icons/imageswitch/btncheckoff1.png";
    const char * const ON_FILE_PATH = ":/icons/imageswitch/btncheckon1.png";
}

ImageSwitch::ImageSwitch(QWidget* parent)
: QWidget(parent)
, mIsChecked(false)
, mImgOffFile(OFF_FILE_PATH)
, mImgOnFile(ON_FILE_PATH)
{
    this->resize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
	this->setMinimumSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
}

void ImageSwitch::mousePressEvent(QMouseEvent*)
{
    mIsChecked = !mIsChecked;
	this->update();
	emit clicked();
}

void ImageSwitch::paintEvent(QPaintEvent*)
{
	QPainter painter(this);
	painter.setRenderHints(QPainter::SmoothPixmapTransform);
	QImage img(mIsChecked ? mImgOffFile : mImgOnFile);
	img = img.scaled(this->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
	//按照比例自动居中绘制
	int pixX = rect().center().x() - img.width() / 2;
	int pixY = rect().center().y() - img.height() / 2;
	QPoint point(pixX, pixY);
	painter.drawImage(point, img);
}

bool ImageSwitch::getChecked() const
{
	return mIsChecked;
}


void ImageSwitch::setChecked(bool value) {
    if (this->mIsChecked == value) return;
    this->mIsChecked = value;
    this->update();
}