在Qt开发过程中，有时候我们要显示一个有阴影的对话框，这时一般采用自定义实现，然而最近在开发时软件时，Win11上显示正常，Win10或其他Win11电脑显示不正常，存在兼容性问题吗？
下面是具体的源码
#ifndef POPUPPEPANEL_H
#define POPUPPEPANEL_H
#include <QWidget>
class QPushButton;
class PopupPanel : public QWidget
{
Q_OBJECT
public:
explicit PopupPanel(QWidget *parent = nullptr);
protected:
void paintEvent(QPaintEvent *event) override;
private:
void initView();
private:
QPushButton *m_btnAi{nullptr};
QPushButton *m_btnDoc{nullptr};
QPushButton *m_btnLink{nullptr};
QPushButton *m_btnExcel{nullptr};
};
#endif // POPUPPEPANEL_H
#include "popuppanel.h"
#include <QPainter>
#include <QVBoxLayout>
#include <QSpacerItem>
#include <QtMath>
#include <QApplication>
#include <QDateTime>
#include <QPushButton>
#include <QPainterPath>
#define PRINTTIME QDateTime::currentDateTime().toString("yyyy.MM.dd hh:mm:ss.zzz");
PopupPanel::PopupPanel(QWidget *parent) :
QWidget(parent)
{
setAttribute(Qt::WA_TranslucentBackground, true);
initView();
}
void PopupPanel::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event);
//绘制阴影
QPainter painter(this);
QPainterPath path;
path.setFillRule(Qt::WindingFill);
path.addRoundedRect(5, 5, this->width() - 5 * 2, this->height() - 5 * 2, 3, 3);
painter.setRenderHint(QPainter::Antialiasing, true);
painter.fillPath(path, QBrush(Qt::white));
QColor color("#BBBBBB");
for (int i = 0; i < 5; i++)
{
QPainterPath path;
path.setFillRule(Qt::WindingFill);
path.addRoundedRect(5 - i, 5 - i, this->width() - (5 - i) * 2, this->height() - (5 - i) * 2, 3 + i, 3 + i);
color.setAlpha(80 - qSqrt(i) * 40);
painter.setPen(color);
painter.drawPath(path);
}
}
void PopupPanel::initView()
{
QVBoxLayout *vLayoutMain = new QVBoxLayout();
vLayoutMain->setSpacing(12);//4
vLayoutMain->setContentsMargins(5, 12, 5, 12);
vLayoutMain->setObjectName(QString::fromUtf8("vLayoutMain"));
QSize size(110, 28);
m_btnAi = new QPushButton(this);
m_btnAi->setMinimumSize(size);
m_btnAi->setMaximumSize(size);
m_btnDoc = new QPushButton(this);
m_btnDoc->setMinimumSize(size);
m_btnDoc->setMaximumSize(size);
m_btnLink = new QPushButton(this);
m_btnLink->setMinimumSize(size);
m_btnLink->setMaximumSize(size);
m_btnExcel = new QPushButton(this);
m_btnExcel->setMinimumSize(size);
m_btnExcel->setMaximumSize(size);
vLayoutMain->addWidget(m_btnAi);
vLayoutMain->addWidget(m_btnDoc);
vLayoutMain->addWidget(m_btnLink);
vLayoutMain->addWidget(m_btnExcel);
this->setLayout(vLayoutMain);
//灰底
QString strButtonStyle = QString("QPushButton{background-color:transparent;border-radius:0px;"
"background-image: url(:/image/%1);background-origin:content;background-position:left;"
"background-repeat: no-repeat;text-align:center;padding-left:12px;border:none;}"
"QPushButton:hover{background-color:#F2F2F2;}"
"QPushButton:pressed{background-color:#D5E7FE;}"
);
m_btnAi->setStyleSheet(strButtonStyle.arg("ai.png"));
m_btnDoc->setStyleSheet(strButtonStyle.arg("ding_doc.png"));
m_btnLink->setStyleSheet(strButtonStyle.arg("link.png"));
m_btnExcel->setStyleSheet(strButtonStyle.arg("excel.png"));
QFont font = qApp->font();
font.setPixelSize(14);
m_btnAi->setFont(font);
m_btnDoc->setFont(font);
m_btnLink->setFont(font);
m_btnExcel->setFont(font);
m_btnAi->setText("Ai");
m_btnDoc->setText("Doc");
m_btnLink->setText("Link");
m_btnExcel->setText("Excel");
}
#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
#include "popuppanel.h"
QT_BEGIN_NAMESPACE
namespace Ui { class Dialog; }
QT_END_NAMESPACE
class Dialog : public QDialog
{
Q_OBJECT
public:
Dialog(QWidget *parent = nullptr);
~Dialog();
void initData();
public slots:
void slotShowDialog();
private:
Ui::Dialog *ui;
PopupPanel *m_popupPanel{nullptr};
};
#endif // DIALOG_H#include "dialog.h"
#include "ui_dialog.h"
#include <QDebug>
Dialog::Dialog(QWidget *parent)
: QDialog(parent)
, ui(new Ui::Dialog)
{
ui->setupUi(this);
initData();
}
Dialog::~Dialog()
{
delete ui;
}
void Dialog::initData()
{
QString strButtonStyle = QString("QPushButton{background-color:transparent;border-radius:0px;"
"background-image: url(:/image/show_move_control_normal.png);background-origin:content;background-position:left;"
"background-repeat: no-repeat;text-align:left;padding-left:12px;border:none;}"
"QPushButton:hover{background-color:#F2F2F2;background-image: url(:/image/show_move_control_hover.png);}"
"QPushButton:pressed{background-color:#D5E7FE;background-image: url(:/image/show_move_control_normal.png);}"
);
//显示阴影对话框
m_popupPanel = new PopupPanel(this);
m_popupPanel->setObjectName(QString("m_popupPanel"));
m_popupPanel->setMaximumSize(QSize(120, 150));
m_popupPanel->setMinimumSize(QSize(120, 150));
m_popupPanel->setWindowFlags(Qt::FramelessWindowHint | Qt::Popup);
m_popupPanel->hide();
connect(ui->pushButton, SIGNAL(clicked()), this, SLOT(slotShowDialog()));
}
void Dialog::slotShowDialog()
{
qDebug() << "slotShowDialog=============================" << ui->pushButton->pos();
QPoint point = mapToGlobal(ui->pushButton->pos());
qDebug() << "slotShowDialog======================point=======" << point;
m_popupPanel->move(point.x() - 130, point.y() - 160);
m_popupPanel->show();
qDebug() << "slotShowDialog=============================" << m_popupPanel->pos();
}
#include "dialog.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QFont defaultFont = qApp->font();
defaultFont.setFamily("Microsoft YaHei");
qApp->setFont(defaultFont);
Dialog w;
w.show();
return a.exec();
}运行点击Button按钮
这是在Win11上显示的效果
这是在Win10上显示的效果，很明显示，右边和底部有黑色线
同样一份代码为什么不同系统有不同效果呢？
原来有的系统是默认带了这个阴影效果，得把它去掉，即设置属性时，多加一个Qt::NoDropShadowWindowHint
在Dialog::initData()函数里，把
m_popupPanel->setWindowFlags(Qt::FramelessWindowHint | Qt::Popup);改成
m_popupPanel->setWindowFlags(Qt::FramelessWindowHint | Qt::NoDropShadowWindowHint | Qt::Popup);运行效果如下：
文章来源：https://www.toymoban.com/news/detail-856288.html
现在在Win10上没有黑边效果了文章来源地址https://www.toymoban.com/news/detail-856288.html
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