pixslider_QT自定义推子控件_skygog_源码

#include "PixmapSlider.h" #include <QPixmapCache> PixmapSlider::PixmapSlider(QWidget *parent) : QWidget(parent) { m_bVertical = false; m_flag_mousePress = false; m_flag_ThumbPress = false; m_BuddySpinFocus = false; m_bEnable = false; m_nFocus = false; m_nPos = 0; m_nStep = 1; m_nRect = QRect(0,0,this->width(),this->height()); m_nMarginLeft = 0; m_nMarginRight = 0; m_nMarginTop = 0; m_nMarginBottom = 0; m_nThumbHeight = 0; m_nThumbWidth = 0; setCursor(Qt::PointingHandCursor); setFocusPolicy(Qt::ClickFocus); this->setMouseTracking(true); QPixmapCache::setCacheLimit(1); } PixmapSlider::~PixmapSlider() { } // 传入数值 等价于 setValue void PixmapSlider::SetPos(int mPos,bool nFlag) { if(mPos >m_nMax) mPos =m_nMax; if(mPos <m_nMin) mPos =m_nMin; m_nPos = mPos; if(nFlag) emit valueChanged(m_nPos); update(); } /////////////////////////////////////////////////////////////// // 设置Slider背景图：normalPic为正常底图，activePic为活动底图 /////////////////////////////////////////////////////////////// void PixmapSlider::SetChannelImage(QString normalPic,QString activePic) { m_nNormalChannelPic = QPixmap(normalPic); m_nActiveChannelPic = QPixmap(activePic); m_nRect.setWidth(m_nNormalChannelPic.width()); m_nRect.setHeight(m_nNormalChannelPic.height()); this->setFixedSize(m_nRect.width(),m_nRect.height()); if(m_nNormalChannelPic.width() > m_nNormalChannelPic.height()) m_bVertical = false; else m_bVertical = true; } /////////////////////////////////////////////////////////////// // 设置推子图 /////////////////////////////////////////////////////////////// void PixmapSlider::SetThumbImage(QString normalPic,QString activePic) { m_nThumb_Normal = QPixmap(normalPic); m_nThumb_Active = QPixmap(activePic); m_nThumbHeight = m_nThumb_Normal.height(); m_nThumbWidth = m_nThumb_Normal.width(); } /////////////////////////////////////////////////////////////// // 设置推子上下左右的间距 /////////////////////////////////////////////////////////////// void PixmapSlider::SetMargin( int nLeft, int nTop, int nRight, int nBottom ) { m_nMarginLeft = nLeft; m_nMarginRight = nRight; m_nMarginTop = nTop; m_nMarginBottom = nBottom; } /////////////////////////////////////////////////////////////// // 自定义控件 有效值 范围 /////////////////////////////////////////////////////////////// void PixmapSlider::SetRange(int m_MinPos, int m_MaxPos) { m_nMax = m_MaxPos; m_nMin = m_MinPos; } // 外部滚轮或鼠标调用 自增 void PixmapSlider::UpdatePosAdd() { int mPos; mPos = m_nPos+m_nStep; if(mPos >m_nMax) mPos =m_nMax; SetPos(mPos,true); } // 外部滚轮或鼠标调用 自减 void PixmapSlider::UpdatePosRedu() { int mPos; mPos = m_nPos-m_nStep; if(mPos <m_nMin) mPos =m_nMin; SetPos(mPos,true); } // 绑定编辑框，用于点击控件 焦点转移 void PixmapSlider::SetBuddy(NumSpin *m_nSpin,bool m_Flag) { m_nBuddySpin = m_nSpin; m_BuddySpinFocus = m_Flag; } void PixmapSlider::SetDisableFlg(bool nFlag) { m_bEnable = nFlag; if(m_bEnable) setCursor(Qt::PointingHandCursor); else setCursor(Qt::ArrowCursor); } void PixmapSlider::paintEvent(QPaintEvent *e) //从QWidget子类化一个Widget，为了能够使用样式表则需要为自定义Widget提供paintEvent事件 { Q_UNUSED(e); QPainter p(this); p.setRenderHint(QPainter::Antialiasing); if( m_bVertical) { fillRect = m_nRect.adjusted(0, 0, 0, Pos2Pixel(m_nMin + (m_nMax - m_nPos))-m_nRect.height()); m_nThumbRect = QRect(m_nMarginLeft,Pos2Pixel(m_nMin + (m_nMax - m_nPos)) - m_nThumbHeight/2,m_nThumbWidth,m_nThumbHeight); }else{ fillRect = m_nRect.adjusted(0, 0, Pos2Pixel(m_nPos)-m_nRect.width(), 0); m_nThumbRect = QRect(Pos2Pixel(m_nPos) - m_nThumbWidth/2,m_nMarginTop,m_nThumbWidth,m_nThumbHeight); } //画背景 p.drawPixmap(m_nRect, m_nNormalChannelPic); p.drawPixmap(fillRect, m_nActiveChannelPic, fillRect); // 画滑块 if(m_nFocus) p.drawPixmap(m_nThumbRect,m_nThumb_Active); else p.drawPixmap(m_nThumbRect,m_nThumb_Normal); } void PixmapSlider::mousePressEvent(QMouseEvent *event) //单击实现 { if (event->button() == Qt::LeftButton && !m_bEnable) //按下鼠标左键 { m_flag_mousePress = true; if(m_nThumbRect.contains(event->pos())) m_flag_ThumbPress = true; if( m_bVertical ) { if( abs( event->pos().y() - Pos2Pixel( m_nMin + (m_nMax - m_nPos) ) ) <= m_nThumbHeight / 2 ) m_nMouseOffset = event->pos().y() - Pos2Pixel( m_nMin + (m_nMax - m_nPos) ); else m_nMouseOffset = 0; } else { if( abs( event->pos().x() - Pos2Pixel( m_nPos ) ) <= m_nThumbWidth / 2 ) m_nMouseOffset = event->pos().x() - Pos2Pixel( m_nPos ); else m_nMouseOffset = 0; } UpDataPressDown(event->pos()); if(m_BuddySpinFocus) { m_nFocus = true; if(!m_nBuddySpin->hasFocus()) m_nBuddySpin->setFocus(); }else{ m_nFocus = true; this->setFocus(); } emit sliderClicked(); } QWidget::mousePressEvent(event); } void PixmapSlider::UpDataPressDown(QPoint point) { if( !m_flag_mousePress) return; int nPixel; // Boundary check if( m_bVertical ) { nPixel = point.y() - m_nMouseOffset; if( nPixel > m_nRect.height() - m_nMarginBottom - m_nThumbHeight/2 ) nPixel = m_nRect.height() - m_nMarginBottom - m_nThumbHeight/2; if( nPixel < m_nMarginTop + m_nThumbHeight/2 ) nPixel = m_nMarginTop + m_nThumbHeight/2; } else { nPixel = point.x() - m_nMouseOffset; if( nPixel < m_nMarginLeft + m_nThumbWidth/2 ) nPixel = m_nMarginLeft + m_nThumbWidth/2; if( nPixel > m_nRect.width() - m_nMarginRight - m_nThumbWidth/2 ) nPixel = m_nRect.width() - m_nMarginRight - m_nThumbWidth/2; } // Apply change if(m_bVertical) { if( Pos2Pixel(m_nPos) != nPixel ) { if(((m_nMin + (m_nMax - m_nPos))-Pixel2Pos(nPixel)) >0) SetPos(m_nPos+m_nStep,true); else SetPos(m_nPos-m_nStep,true); } }else{ if( Pos2Pixel(m_nPos) != nPixel ) { if((m_nPos-Pixel2Pos(nPixel)) >0) SetPos(m_nPos-m_nStep,true); else SetPos(m_nPos+m_nStep,true); } } } void PixmapSlider::mouseReleaseEvent(QMouseEvent *event) //释放实现 { Q_UNUSED(event); m_flag_mousePress = false; m_flag_ThumbPress = false; QWidget::mouseReleaseEvent(event); } void PixmapSlider::focusOutEvent(QFocusEvent *e) { Q_UNUSED(e); m_nFocus = false; update(); } void PixmapSlider::mouseMoveEvent(QMouseEvent *event) //移动实现 { if(m_flag_ThumbPress) { int nPixel; if( m_bVertical ) { nPixel = event->pos().y() - m_nMouseOffset; if( nPixel > m_nRect.height() - m_nMarginBottom - m_nThumbHeight/2 ) nPixel = m_nRect.height() - m_nMarginBottom - m_nThumbHeight/2; if( nPixel < m_nMarginTop + m_nThumbHeight/2 ) nPixel = m_nMarginTop + m_nThumbHeight/2; } else { nPixel = event->pos().x() - m_nMouseOffset