QT 实现自定义标题栏带阴影的窗口

#include "CTitleBar.h" #include <QMouseEvent> #include <QStyleOption> #include <QPushButton> #include <QPainter> #include <qt_windows.h> #pragma comment(lib, "user32.lib") CTitleBar::CTitleBar(QWidget *parent) : QWidget(parent) { ui.setupUi(this); //禁止父窗口影响子窗口样式 setAttribute(Qt::WA_StyledBackground); //左上，右上圆角10；左下，右下圆角0 this->setStyleSheet("QWidget{background-color:rgb(54,54,54); \ border-top-left-radius:10px; \ border-top-right-radius:10px; \ border-bottom-left-radius:0px; \ border-bottom-right-radius:0px;}"); ui.label_title->setText(u8"我是标题"); ui.label_title->setStyleSheet("QLabel{font-family: Microsoft YaHei; \ font-size:18px; \ color:#BDC8E2;background-color:rgb(54,54,54);}"); ui.btnSet->setFixedSize(32, 32); ui.btnSet->setText(""); ui.btnSet->setFlat(true); ui.btnSet->setStyleSheet("QPushButton{background-image:url(:/titlebar/resource/titlebar/set.svg);border:none}" \ "QPushButton:hover{" \ "background-color:rgb(99, 99, 99);" \ "background-image:url(:/titlebar/resource/titlebar/set_hover.svg);border:none;}"); ui.btnMin->setFixedSize(32, 32); ui.btnMin->setText(""); ui.btnMin->setFlat(true); ui.btnMin->setStyleSheet("QPushButton{background-image:url(:/titlebar/resource/titlebar/min.svg);border:none}" \ "QPushButton:hover{" \ "background-color:rgb(99, 99, 99);" \ "background-image:url(:/titlebar/resource/titlebar/min_hover.svg);border:none;}"); ui.btnMax->setFixedSize(35, 35); ui.btnMax->setFlat(true); ui.btnMax->setText(""); ui.btnMax->setStyleSheet("QPushButton{background-image:url(:/titlebar/resource/titlebar/normal.svg);border:none; \ background-position:center; \ background-repeat:no-repeat;} \ QPushButton:hover{ \ background-color:rgb(99, 99, 99); \ background-image:url(:/titlebar/resource/titlebar/normal_hover.svg);border:none;}"); ui.btnClose->setFixedSize(32, 32); ui.btnClose->setFlat(true); ui.btnClose->setText(""); ui.btnClose->setStyleSheet("QPushButton{background-image:url(:/titlebar/resource/titlebar/close.svg);border:none}" \ "QPushButton:hover{" \ "background-color:rgb(99, 99, 99);" \ "background-image:url(:/titlebar/resource/titlebar/close_hover.svg);border:none;}"); connect(ui.btnMin, SIGNAL(clicked(bool)), this, SLOT(on_Clicked())); connect(ui.btnMax, SIGNAL(clicked(bool)), this, SLOT(on_Clicked())); connect(ui.btnClose, SIGNAL(clicked(bool)), this, SLOT(on_Clicked())); } CTitleBar::~CTitleBar() { } void CTitleBar::paintEvent(QPaintEvent* event) { //决定样式表是否起作用 /*QStyleOption opt; opt.init(this); QPainter p(this); style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this); QWidget::paintEvent(event);*/ } void CTitleBar::on_Clicked() { QPushButton* pButton = qobject_cast<QPushButton*>(sender()); QWidget* pWindow = this->window(); if (pWindow->isTopLevel()) { if (pButton == ui.btnMin) { pWindow->showMinimized(); } else if (pButton == ui.btnMax) { if (pWindow->isMaximized()) { pWindow->showNormal(); ui.btnMax->setStyleSheet("QPushButton{background-image:url(:/titlebar/resource/titlebar/normal.svg);border:none; \ background-position:center; \ background-repeat:no-repeat;} \ QPushButton:hover{ \ background-color:rgb(99, 99, 99); \ background-image:url(:/titlebar/resource/titlebar/normal_hover.svg);border:none;}"); emit sig_max(false); } else { pWindow->showMaximized(); ui.btnMax->setStyleSheet("QPushButton{background-image:url(:/titlebar/resource/titlebar/max.svg);border:none; \ background-position:center; \ background-repeat:no-repeat;} \ QPushButton:hover{ \ background-color:rgb(99, 99, 99); \ background-image:url(:/titlebar/resource/titlebar/max_hover.svg);border:none;}"); emit sig_max(true); } } else if (pButton == ui.btnClose) { emit sig_close(); } } } void CTitleBar::mousePressEvent(QMouseEvent* event) { if (ReleaseCapture()) { QWidget* pWindow = this->window(); if (pWindow->isTopLevel()) { SendMessage(HWND(pWindow->winId()), WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0); } } event->ignore(); } void CTitleBar::mouseDoubleClickEvent(QMouseEvent* event) { emit ui.btnMax->clicked(); }