qt可拖动控件（qt设置窗口可拖动）

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

qt可拖动控件（qt设置窗口可拖动）

直接上代码

self-contained.h

1 2 3 4 5 6 7 8 9 10 11 #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：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 #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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 #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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 #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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 #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

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 #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(); }