Qt实现可拖动按钮

2023-07-18 11:46:06 301

本文实例为大家分享了Qt实现可拖动按钮的具体代码，供大家参考，具体内容如下

直接上代码

self-contained.h

#ifndefSELFCONTAINED_H
#defineSELFCONTAINED_H

#include
#include
#include
#include
#include
#include

#endif//SELFCONTAINED_H

按钮控件

drawbutton.h：

#ifndefDRAGBUTTON_H
#defineDRAGBUTTON_H

#include"self-contained.h"

classDragButton:publicQWidget
{
Q_OBJECT
public:
DragButton(QWidget*parent=0);

voidsetInitialScaling(doublescaling);
voidsetPixmap(QStringpixmap);
voidsetText(QStringstr);
voidsetIsHold(boolflag);
protected:
intisPress;
intisHold;

QTimer*m_aniTimer;
QTimer*m_holdTimer;

doublem_scaling;
doublem_InitialScaling;//当前缩放比例
QPointm_mouseSrcPos;//最小缩放比例

QPixmapm_pixmap;
QStringm_text;

voidpaintEvent(QPaintEvent*);
voidenterEvent(QEvent*);
voidleaveEvent(QEvent*);
voidmousePressEvent(QMouseEvent*);
voidmouseReleaseEvent(QMouseEvent*);
voidmouseMoveEvent(QMouseEvent*);

signals:
voidrelease_signal();
voiddrag_signal();//拖动时发出信号
voidclicked();
publicslots:
voidzoomIn();//放大
voidzoomOut();//缩小
voidhold_slot();
};

#endif//DRAGBUTTON_H

drawbutton.cpp

#include"dragbutton.h"

DragButton::DragButton(QWidget*parent):
QWidget(parent),isPress(0),isHold(0),m_scaling(0.5),m_InitialScaling(0.5),m_mouseSrcPos(0,0)
{
m_aniTimer=newQTimer(this);
m_aniTimer->setInterval(7);

m_holdTimer=newQTimer(this);
m_holdTimer->setInterval(1000);
m_holdTimer->setSingleShot(true);
connect(m_holdTimer,SIGNAL(timeout()),this,SLOT(hold_slot()));
}

voidDragButton::setInitialScaling(doublescaling)
{
if(scaling<=1&&scaling>0)
{
m_InitialScaling=scaling;
m_scaling=scaling;
}
}

voidDragButton::setPixmap(QStringpixmap)
{
m_pixmap.load(pixmap);
update();
}

voidDragButton::setText(QStringstr)
{
m_text=str;
update();
}

voidDragButton::setIsHold(boolflag)
{
isHold=flag;
update();
}

voidDragButton::paintEvent(QPaintEvent*)
{
if(m_pixmap.isNull())
return;

QPainterpainter(this);
painter.setRenderHint(QPainter::Antialiasing);

if(isPress)
{
painter.setPen(Qt::NoPen);
painter.setBrush(QColor(0,0,0,130));
painter.drawRoundedRect(rect(),20,20);
}

m_pixmap=m_pixmap.scaled(width(),height()-20,Qt::KeepAspectRatio,Qt::SmoothTransformation);

intw=m_pixmap.width()*m_scaling;
inth=m_pixmap.height()*m_scaling;
painter.drawPixmap(QRect((width()-w)/2,(height()-h)/2-20,w,h),
m_pixmap,m_pixmap.rect());

painter.setPen(QColor(0,0,0));
painter.drawText(QRect(0,height()-40,width(),40),Qt::AlignCenter,m_text);
}

voidDragButton::enterEvent(QEvent*)
{
disconnect(m_aniTimer,SIGNAL(timeout()),this,SLOT(zoomOut()));
connect(m_aniTimer,SIGNAL(timeout()),this,SLOT(zoomIn()));

m_aniTimer->start();
}

voidDragButton::leaveEvent(QEvent*)
{
disconnect(m_aniTimer,SIGNAL(timeout()),this,SLOT(zoomIn()));
connect(m_aniTimer,SIGNAL(timeout()),this,SLOT(zoomOut()));

m_aniTimer->start();
}

voidDragButton::mousePressEvent(QMouseEvent*e)
{
if(!isHold)
isPress=1;

m_holdTimer->start();

m_mouseSrcPos=e->pos();

update();
}

voidDragButton::mouseReleaseEvent(QMouseEvent*e)
{
m_holdTimer->stop();

isPress=0;
isHold=0;

if(rect().contains(e->pos()))
emitclicked();

emitrelease_signal();

update();
}

voidDragButton::mouseMoveEvent(QMouseEvent*e)
{
if(isHold)
{
move(pos()-m_mouseSrcPos+e->pos());
emitdrag_signal();
}
else
m_mouseSrcPos=e->pos();
}

voidDragButton::zoomIn()
{
m_scaling+=0.01;
if(m_scaling>=1)
{
m_scaling=1;
m_aniTimer->stop();
}
update();
}

voidDragButton::zoomOut()
{
m_scaling-=0.01;
if(m_scaling<=m_InitialScaling)
{
m_scaling=m_InitialScaling;
m_aniTimer->stop();
}
update();
}

voidDragButton::hold_slot()
{
isHold=1;
isPress=0;
m_aniTimer->stop();
m_scaling=m_InitialScaling;

update();
}

整合按钮的控件

drawwidget.h

#include"dragbutton.h"

classDragWidget:publicQWidget
{
Q_OBJECT

public:
DragWidget(QWidget*parent=0);
~DragWidget();

voidaddButton(DragButton*);

protected:
QVectorBtnVector;
QPointm_mouseSrcPos;//记录坐标点

voidresetInterface();//复位

signals:

publicslots:
voidBtnMove_slots();
voidBtnRelease_slots();
};

#endif//DRAGWIDGET_H

drawwidget.cpp

#include"dragwidget.h"

DragWidget::DragWidget(QWidget*parent)
:QWidget(parent),m_mouseSrcPos(0,0)
{
}

DragWidget::~DragWidget()
{

}

voidDragWidget::addButton(DragButton*btn)
{
connect(btn,SIGNAL(drag_signal()),this,SLOT(BtnMove_slots()));
connect(btn,SIGNAL(release_signal()),this,SLOT(BtnRelease_slots()));


BtnVector.push_back(btn);
btn->show();
resetInterface();
}

voidDragWidget::resetInterface()
{
for(inti=0;isetGeometry(i*width()/BtnVector.length(),0,width()/BtnVector.length(),height());
}
}

voidDragWidget::BtnMove_slots()
{
for(inti=0;ipos().x()+BtnVector[i]->width()/2)/(width()/BtnVector.length());

for(intl=0;lsetGeometry(l*width()/BtnVector.length(),0,width()/BtnVector.length(),height());
elseif((l>i&&l<=flag)||(l>=flag&&lsetGeometry((l+((i-flag)>0?1:-1))*width()/BtnVector.length(),0,width()/BtnVector.length(),height());
elseif(l>flag&&l>i)
BtnVector[l]->setGeometry(l*width()/BtnVector.length(),0,width()/BtnVector.length(),height());
}
//注释部分合为上面的循环
//if(flag>=i)//往后拖
//for(intl=0;lsetGeometry(l*width()/BtnVector.length(),0,width()/BtnVector.length(),height());
//elseif(l>i&&l<=flag)
//BtnVector[l]->setGeometry((l-1)*width()/BtnVector.length(),0,width()/BtnVector.length(),height());
//elseif(l>flag)
//BtnVector[l]->setGeometry(l*width()/BtnVector.length(),0,width()/BtnVector.length(),height());
//}
//elseif(flagsetGeometry(l*width()/BtnVector.length(),0,width()/BtnVector.length(),height());
//elseif(l>=flag&&lsetGeometry((l+1)*width()/BtnVector.length(),0,width()/BtnVector.length(),height());
//elseif(l>i)
//BtnVector[l]->setGeometry(l*width()/BtnVector.length(),0,width()/BtnVector.length(),height());
//}
break;
}
}

voidDragWidget::BtnRelease_slots()
{
for(inti=0;ipos().x();
if(posX<0)
posX=0;
elseif(posX>width())
posX=width();

intflag=(posX+BtnVector[i]->width()/2)/(width()/BtnVector.length());

DragButton*btn=BtnVector[i];//修改vector顺序
if(flag>=i)
for(intl=i;lflag;--l)
BtnVector[l]=BtnVector[l-1];

BtnVector[flag]=btn;
}

resetInterface();//复位
}

使用

main.cpp

#include"dragwidget.h"
#include

intmain(intargc,char*argv[])
{
QApplicationa(argc,argv);

DragWidgetww;
ww.setGeometry(200,200,800,200);

DragButtonw(&ww);
w.setPixmap(":/image/image/contacts.png");
w.setText("按钮1");
w.setInitialScaling(0.6);

DragButtonw2(&ww);
w2.setPixmap(":/image/image/time.png");
w2.setText("按钮2");
w2.setInitialScaling(0.6);

DragButtonw3(&ww);
w3.setPixmap(":/image/image/checking.png");
w3.setText("按钮3");
w3.setInitialScaling(0.6);

DragButtonw4(&ww);
w4.setPixmap(":/image/image/suitcase.png");
w4.setText("按钮4");
w4.setInitialScaling(0.6);

ww.addButton(&w);
ww.addButton(&w2);
ww.addButton(&w3);
ww.addButton(&w4);
ww.show();

returna.exec();
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。

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Qt实现可拖动按钮

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