Qt可拖动按钮 Qt实现可拖动按钮
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直接上代码
self-contained.h
#ifndef SELFCONTAINED_H #define SELFCONTAINED_H #include <QWidget> #include <QPainter> #include <QTimer> #include <QImage> #include <QMouseEvent> #include <QVector> #endif // SELFCONTAINED_H
按钮控件
drawbutton.h:
#ifndef DRAGBUTTON_H #define DRAGBUTTON_H #include "self-contained.h" class DragButton : public QWidget { Q_OBJECT public: DragButton(QWidget *parent = 0); void setInitialScaling(double scaling); void setPixmap(QString pixmap); void setText(QString str); void setIsHold(bool flag); protected: int isPress; int isHold; QTimer *m_aniTimer; QTimer *m_holdTimer; double m_scaling; double m_InitialScaling;//当前缩放比例 QPoint m_mouseSrcPos;//最小缩放比例 QPixmap m_pixmap; QString m_text; void paintEvent(QPaintEvent *); void enterEvent(QEvent *); void leaveEvent(QEvent *); void mousePressEvent(QMouseEvent *); void mouseReleaseEvent(QMouseEvent *); void mouseMoveEvent(QMouseEvent *); signals: void release_signal(); void drag_signal();//拖动时发出信号 void clicked(); public slots: void zoomIn();//放大 void zoomOut();//缩小 void hold_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 = new QTimer(this); m_aniTimer->setInterval(7); m_holdTimer = new QTimer(this); m_holdTimer->setInterval(1000); m_holdTimer->setSingleShot(true); connect(m_holdTimer,SIGNAL(timeout()),this,SLOT(hold_slot())); } void DragButton::setInitialScaling(double scaling) { if(scaling <= 1 && scaling > 0) { m_InitialScaling = scaling; m_scaling = scaling; } } void DragButton::setPixmap(QString pixmap) { m_pixmap.load(pixmap); update(); } void DragButton::setText(QString str) { m_text = str; update(); } void DragButton::setIsHold(bool flag) { isHold = flag; update(); } void DragButton::paintEvent(QPaintEvent *) { if(m_pixmap.isNull()) return; QPainter painter(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); int w = m_pixmap.width()*m_scaling; int h = 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); } void DragButton::enterEvent(QEvent *) { disconnect(m_aniTimer,SIGNAL(timeout()),this,SLOT(zoomOut())); connect(m_aniTimer,SIGNAL(timeout()),this,SLOT(zoomIn())); m_aniTimer->start(); } void DragButton::leaveEvent(QEvent *) { disconnect(m_aniTimer,SIGNAL(timeout()),this,SLOT(zoomIn())); connect(m_aniTimer,SIGNAL(timeout()),this,SLOT(zoomOut())); m_aniTimer->start(); } void DragButton::mousePressEvent(QMouseEvent *e) { if(!isHold) isPress = 1; m_holdTimer->start(); m_mouseSrcPos = e->pos(); update(); } void DragButton::mouseReleaseEvent(QMouseEvent *e) { m_holdTimer->stop(); isPress = 0; isHold = 0; if(rect().contains(e->pos())) emit clicked(); emit release_signal(); update(); } void DragButton::mouseMoveEvent(QMouseEvent *e) { if(isHold) { move(pos() - m_mouseSrcPos + e->pos()); emit drag_signal(); } else m_mouseSrcPos = e->pos(); } void DragButton::zoomIn() { m_scaling += 0.01; if(m_scaling >= 1) { m_scaling = 1; m_aniTimer->stop(); } update(); } void DragButton::zoomOut() { m_scaling -= 0.01; if(m_scaling <= m_InitialScaling) { m_scaling = m_InitialScaling; m_aniTimer->stop(); } update(); } void DragButton::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" class DragWidget : public QWidget { Q_OBJECT public: DragWidget(QWidget *parent = 0); ~DragWidget(); void addButton(DragButton*); protected: QVector<DragButton*> BtnVector; QPoint m_mouseSrcPos;//记录坐标点 void resetInterface();//复位 signals: public slots: void BtnMove_slots(); void BtnRelease_slots(); }; #endif // DRAGWIDGET_H
drawwidget.cpp
#include "dragwidget.h" DragWidget::DragWidget(QWidget *parent) : QWidget(parent),m_mouseSrcPos(0,0) { } DragWidget::~DragWidget() { } void DragWidget::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(); } void DragWidget::resetInterface() { for(int i = 0;i < BtnVector.length();++i) { BtnVector[i]->setGeometry(i * width()/BtnVector.length(),0,width()/BtnVector.length(),height()); } } void DragWidget::BtnMove_slots() { for(int i = 0;i < BtnVector.length();++i)//找到鼠标所在的按钮 if(BtnVector[i] == sender()) { int flag = (BtnVector[i]->pos().x() + BtnVector[i]->width()/2)/(width()/BtnVector.length()); for(int l = 0;l < BtnVector.length();++l)//这里也可以做动画,但这次主要实现拖动的功能 { if(l < i && l <flag) BtnVector[l]->setGeometry(l * width()/BtnVector.length(),0,width()/BtnVector.length(),height()); else if((l > i && l <= flag)||(l >= flag && l < i)) BtnVector[l]->setGeometry((l + ((i-flag)>0?1:-1))* width()/BtnVector.length(),0,width()/BtnVector.length(),height()); else if(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(int l = 0;l < BtnVector.length();++l) // { // if(l < i) // BtnVector[l]->setGeometry(l * width()/BtnVector.length(),0,width()/BtnVector.length(),height()); // else if(l > i && l <= flag) // BtnVector[l]->setGeometry((l - 1)* width()/BtnVector.length(),0,width()/BtnVector.length(),height()); // else if(l > flag) // BtnVector[l]->setGeometry(l * width()/BtnVector.length(),0,width()/BtnVector.length(),height()); // } // else if(flag < i)//往前拖 // for(int l = 0;l < BtnVector.length();++l) // { // if(l < flag) // BtnVector[l]->setGeometry(l * width()/BtnVector.length(),0,width()/BtnVector.length(),height()); // else if(l >= flag && l < i) // BtnVector[l]->setGeometry((l + 1)* width()/BtnVector.length(),0,width()/BtnVector.length(),height()); // else if(l > i) // BtnVector[l]->setGeometry(l * width()/BtnVector.length(),0,width()/BtnVector.length(),height()); // } break; } } void DragWidget::BtnRelease_slots() { for(int i = 0;i < BtnVector.length();++i)//找到鼠标所在的按钮 if(BtnVector[i] == sender()) { int posX = BtnVector[i]->pos().x(); if(posX < 0) posX = 0; else if(posX > width()) posX = width(); int flag = (posX+BtnVector[i]->width()/2)/(width()/BtnVector.length()); DragButton *btn = BtnVector[i];//修改vector顺序 if(flag >= i) for(int l = i;l < flag;++l) BtnVector[l] = BtnVector[l+1]; else for(int l = i;l > flag;--l) BtnVector[l] = BtnVector[l-1]; BtnVector[flag] = btn; } resetInterface();//复位 }
使用
main.cpp
#include "dragwidget.h" #include <QApplication> int main(int argc, char *argv[]) { QApplication a(argc, argv); DragWidget ww; ww.setGeometry(200,200,800,200); DragButton w(&ww); w.setPixmap(":/image/image/contacts.png"); w.setText("按钮1"); w.setInitialScaling(0.6); DragButton w2(&ww); w2.setPixmap(":/image/image/time.png"); w2.setText("按钮2"); w2.setInitialScaling(0.6); DragButton w3(&ww); w3.setPixmap(":/image/image/checking.png"); w3.setText("按钮3"); w3.setInitialScaling(0.6); DragButton w4(&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(); return a.exec(); }
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