qgamebutton.cpp

linux 下的 仿联众版俄罗斯方块游戏。qt3 实现。 具有 人机交互功能。 具有 对战模式。 喜欢玩俄罗斯方块的朋友们

/*********************************************************************** *
 *
 *    linux版仿联众俄罗斯方块 v1.0
 *    该软件在GPL(GNU通用公共许可证)下发布
 *
 *    Copyright (C)   <[e-mail]>
 *
 *   This source code is licensed under the GNU General Public License
 *
 ************************************************************************/

/*
 * 自定义按钮类, 这种方法在qt4中就行不通了，～～
 */
#include <qapplication.h>
#include <qpainter.h>
#include <qpoint.h>
#include <qmutex.h>

#include "config.h"
#include "qgamebutton.h"

QMutex mouseMutex; //

QGameButton::QGameButton(const QString & fn,QWidget *parent, const char *name)
: QWidget(parent, name ),pix(QPixmap(fn))
{
	mouseStatus = eMouseOut;
	setMouseTracking(true);
}

QGameButton::~QGameButton()
{
}

void QGameButton::paintEvent( QPaintEvent * )
{
	drawButton();
}

void QGameButton::resizeEvent ( QResizeEvent * e)
{
	if(e->size().width()!=pix.width()/4
	   || e->size().height()!=pix.height()){
		   resize ( pix.width()/4,pix.height() );
	}
}
int QGameButton::width()
{
	return pix.width()/4;
}
int QGameButton::height()
{
	return pix.height();
}

void QGameButton::setBitmap(const char *name)
{
	pix.load(name);
	drawButton(); // 重绘
}

void QGameButton:: mouseMoveEvent ( QMouseEvent * e )
{
	volatile int x,y;
	mouseMutex.lock();
	grabMouse ();
	x=e->x();
	y=e->y();
	if(x<=0 || x>=width() || y<=0 || y>=height()){
		mouseStatus = eMouseOut;
		drawButton();
	}
	else{
		if(mouseStatus != eMousePressed && mouseStatus!=eMouseOn){
			mouseStatus =eMouseOn;
			drawButton();
		}
	}
	releaseMouse();
	mouseMutex.unlock();
}
void QGameButton::mousePressEvent ( QMouseEvent *e)
{
	int x,y;
	mouseMutex.lock(); //据qt文档上说grabMouse有bug ...
	grabMouse ();      // 鼠标是共享资源，加了锁再说
	x=e->x();
	y=e->y();
	if(x<=0 || x>=width() || y<=0 || y>=height()){
		mouseStatus = eMouseOut;
	}else{
		mouseStatus = eMousePressed;
	}
	releaseMouse();
	mouseMutex.unlock();
	drawButton();
}
void QGameButton::directReleaMouse()
{
	mouseStatus = eMouseOut;
	releaseMouse(); // 无条件释放，
}

void QGameButton::mouseReleaseEvent ( QMouseEvent *e )
{
	int x,y;
	mouseMutex.lock();
	grabMouse();
	x=e->x();
	y=e->y();
	if(x<=0 || x>=width() || y<=0 || y>=height()){
		mouseStatus = eMouseOut;
	}else{
		mouseStatus = eMouseOn;
		emit click();
	}
	releaseMouse();
	mouseMutex.unlock();
	drawButton();
}

void QGameButton::drawButton(void)
{
	painter_lock();
	QPainter p( this );
	switch(mouseStatus)
	{
	case eMouseOut:
		p.drawPixmap(0,0, pix );
		break;
	case eMouseOn:
		p.drawPixmap(0,0, pix, width(),0 );
		break;
	case eMousePressed:
		p.drawPixmap(0,0, pix, 2*width(),0 );
		break;
	}
	painter_unlock();
}