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Qt 9宫图实现窗口阴影
<pre name="code" class="cpp">#include <QBoxLayout>
#include <QPalette>
#include <QGraphicsDropShadowEffect>
#include <QDebug>
#include <QSizePolicy>
#include <QPainter>
#include "bfwidget.h"
//------------------------------------------------------------
//----------- Created with 010 Editor -----------
//------ www.sweetscape.com/010editor/ ------
//
// File : G:\project\Sample\ShadeWindow\box-shadow.png
// Address : 0 (0x0)
// Size : 588 (0x24C)
//------------------------------------------------------------
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const QPixmap _DrawNinePatch(QSize szDst, const QPixmap &srcPix)
{
// 绘制背景图到, 以九宫格形式
QPixmap dstPix(szDst);
dstPix.fill(QColor(255, 255, 255, 0));
QPainter painter;
painter.begin(&dstPix);
int nW = szDst.width();
int nH = szDst.height();
int nWBg = srcPix.width();
int nHBg = srcPix.height();
QPoint m_ptBgLT(10, 10);
QPoint m_ptBgRB(19, 19);
QPoint ptDstLT(m_ptBgLT.x(), m_ptBgLT.y());
QPoint ptDstRB(nW - (nWBg - m_ptBgRB.x()), nH - (nHBg - m_ptBgRB.y()));
//LT
painter.drawPixmap(QRect(0, 0, ptDstLT.x(), ptDstLT.y()), srcPix, QRect(0, 0, m_ptBgLT.x(), m_ptBgLT.y()));
//MT
painter.drawPixmap(QRect(ptDstLT.x(), 0, ptDstRB.x() - ptDstLT.x(), ptDstLT.y()), srcPix, QRect(m_ptBgLT.x(), 0, m_ptBgRB.x() - m_ptBgLT.x(), m_ptBgLT.y()));
//RT
painter.drawPixmap(QRect(ptDstRB.x(), 0, nW - ptDstRB.x(), ptDstLT.y()), srcPix, QRect(m_ptBgRB.x(), 0, nWBg - m_ptBgRB.x(), m_ptBgLT.y()));
//LM
painter.drawPixmap(QRect(0, ptDstLT.y(), ptDstLT.x(), ptDstRB.y() - ptDstLT.y()), srcPix, QRect(0, m_ptBgLT.y(), m_ptBgLT.x(), m_ptBgRB.y() - m_ptBgLT.y()));
//MM
painter.drawPixmap(QRect(ptDstLT.x(), ptDstLT.y(), ptDstRB.x() - ptDstLT.x(), ptDstRB.y() - ptDstLT.y()), srcPix, QRect(m_ptBgLT.x(), m_ptBgLT.y(), m_ptBgRB.x() - m_ptBgLT.x(), m_ptBgRB.y() - m_ptBgLT.y()));
//RM
painter.drawPixmap(QRect(ptDstRB.x(), ptDstLT.y(), nW - ptDstRB.x(), ptDstRB.y() - ptDstLT.y()), srcPix, QRect(m_ptBgRB.x(), m_ptBgLT.y(), nWBg - m_ptBgRB.x(), m_ptBgRB.y() - m_ptBgLT.y()));
//LB
painter.drawPixmap(QRect(0, ptDstRB.y(), ptDstLT.x(), nH - ptDstRB.y()), srcPix, QRect(0, m_ptBgRB.y(), m_ptBgLT.x(), nHBg - m_ptBgRB.y()));
//MB
painter.drawPixmap(QRect(ptDstLT.x(), ptDstRB.y(), ptDstRB.x() - ptDstLT.x(), nH - ptDstRB.y()), srcPix, QRect(m_ptBgLT.x(), m_ptBgRB.y(), m_ptBgRB.x() - m_ptBgLT.x(), nHBg - m_ptBgRB.y()));
//RB
painter.drawPixmap(QRect(ptDstRB.x(), ptDstRB.y(), nW - ptDstRB.x(), nH - ptDstRB.y()), srcPix, QRect(m_ptBgRB.x(), m_ptBgRB.y(), nWBg - m_ptBgRB.x(), nHBg - m_ptBgRB.y()));
painter.end();
return dstPix;
}
BFWidget::BFWidget(QWidget *parent) :
QDialog(parent)
{
//加载阴影图片
_pixShadow.loadFromData(_hexData, 588);
//_pixShadow.load("box-shadow.png");
this->setWindowFlags(Qt::FramelessWindowHint);
this->setAttribute(Qt::WA_TranslucentBackground);
this->resize(600 + 12, 400 + 12);
this->setContentsMargins(6, 6, 6, 6);
}
void BFWidget::mousePressEvent(QMouseEvent * event)
{
//只能是鼠标左键移动和改变大小
if (event->button() == Qt::LeftButton)
{
mouse_press = true;
}
//窗口移动距离
move_point = event->globalPos() - pos();
}
void BFWidget::mouseReleaseEvent(QMouseEvent *)
{
mouse_press = false;
}
void BFWidget::mouseMoveEvent(QMouseEvent *event)
{
//移动窗口
if (mouse_press)
{
QPoint move_pos = event->globalPos();
move(move_pos - move_point);
}
}
//void BFWidget::resizeEvent(QResizeEvent *event)
//{
// QSize size = event->size();
// container->setGeometry(5, 5, size.width() - 10, size.height() - 10);
// qDebug() << container->rect();
//}
void BFWidget::paintEvent(QPaintEvent *event)
{
QPainter painter(this);
static QColor colItemBg(255, 255, 255); // 默认背景色
QSize szThis = this->rect().size();
QPixmap pixShadowBg = _DrawNinePatch(szThis, _pixShadow);
//pixShadowBg.save("c:/pixShadowBg1.png");
painter.drawPixmap(this->rect(), pixShadowBg);
painter.setPen(colItemBg); //需要画背景，不然会穿透
painter.setBrush(colItemBg);
painter.drawRect(6, 6, szThis.width() - 6 * 2, szThis.height() - 6 * 2);
//this->setMask(pixShadowBg.mask()); //设置圆角
}
#ifndef BFWIDGET_H#define BFWIDGET_H#include <QWidget>#include <QDialog>#include <QMouseEvent>#include <QResizeEvent>/*** 窗口可以拖动* 窗口增加阴影效果* @brief The BFWidget class*/class BFWidget : public QDialog{Q_OBJECTpublic:explicit BFWidget(QWidget *parent = 0);signals:public slots :protected:void mousePressEvent(QMouseEvent *event);void mouseReleaseEvent(QMouseEvent *event);void mouseMoveEvent(QMouseEvent *event);//void resizeEvent(QResizeEvent *event);void paintEvent(QPaintEvent *event);private://显示内容的区域QPixmap _pixShadow; //阴影图片QPoint move_point; //移动的距离bool mouse_press; //按下鼠标左键};#endif // BFWIDGET_H
Qt 9宫图实现窗口阴影
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