我在QWidget
(自定义制作)中遇到QMainWindow
(自定义制作)的问题。我的问题是,当我使用setCentralWidget()
方法将我的窗口小部件添加到我的窗口作为其中心窗口小部件时,它不会显示窗口小部件的背景。正确显示背景非常重要。
这是我的MyWindow.cpp
代码:
#include "MyMainWindow.h"
MyMainWindow::MyMainWindow(QWidget * parent, Qt::WindowFlags flag) :
QMainWindow(parent, flag)
{
this->setFixedSize(1120, 630);
menu = new MyMenu(this);
// setting = new MySetting();
// tutorial = new MyTutorial();
// game = new MyGame();
this->setCentralWidget(menu);
this->show();
}
MyMainWindow::~MyMainWindow()
{
}
我的MyMenu.cpp
代码:
#include "MyMenu.h"
MyMenu::MyMenu(QWidget *parent, Qt::WindowFlags f) :
QWidget(parent, f)
{
this->resize(1120, 630);
this->set_background();
this->construct_buttons();
this->construct_menu();
}
MyMenu::~MyMenu()
{
delete start;
delete setting;
delete tutorial;
delete exit;
delete buttons;
delete logo;
delete menu;
}
void MyMenu::construct_menu()
{
menu = new QVBoxLayout(this);
logo = new QLabel(this);
QPixmap *pixmap = new QPixmap("/home/kahrabian/ClionProjects/Shooter-AP93UT/Contents/logo.png");
logo->setPixmap(*pixmap);
logo->setAlignment(Qt::AlignHCenter);
menu->addWidget(logo);
menu->addLayout(buttons);
delete pixmap;
}
void MyMenu::construct_buttons()
{
buttons = new QHBoxLayout();
start = new QPushButton("Start", this);
buttons->addWidget(start);
setting = new QPushButton("Setting", this);
buttons->addWidget(setting);
tutorial = new QPushButton("Tutorial", this);
buttons->addWidget(tutorial);
exit = new QPushButton("Exit", this);
buttons->addWidget(exit);
}
void MyMenu::set_background()
{
QPalette *palette = new QPalette();
palette->setBrush(this->backgroundRole(),QBrush(QImage("/home/kahrabian/ClionProjects/Shooter-AP93UT/Contents/background_menu.jpg")));
this->setPalette(*palette);
delete palette;
}
我的main.cpp
代码:
#include <QApplication>
#include "MyMenu.h"
#include "MyMainWindow.h"
int main(int argc, char **argv)
{
QApplication app (argc, argv);
MyMainWindow *mainwin = new MyMainWindow();
// MyMenu *MyMenu = new MyMenu();
// MyMenu->show();
return app.exec();
}
任何人都可以帮我解决这个问题吗?
答案 0 :(得分:1)
检查this answer。
我建议你使用Qt样式表。
你需要打这样的话:
setStyleSheet("image: url(path/to/background/image.png);");
在你的小部件上。
此外,您可能需要为小部件实现paintEvent()
以接受样式表。
我通常这样做:
void MyWidget::paintEvent(QPaintEvent *pe)
{
QStyleOption opt;
opt.init(this);
QPainter p(this);
style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);
QWidget::paintEvent(pe);
}