qt实现GetSystemMetrics(SM_CXVIRTUALSCREEN)
时间: 2023-07-13 11:28:26 浏览: 50
在Qt中可以通过QGuiApplication::screens()获取所有的屏幕对象,然后遍历每个屏幕对象来计算虚拟屏幕的宽度。
代码示例:
```cpp
#include <QGuiApplication>
#include <QScreen>
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
int virtualScreenWidth = 0;
QList<QScreen*> screens = QGuiApplication::screens();
foreach (QScreen* screen, screens) {
virtualScreenWidth += screen->geometry().width();
}
qDebug() << "Virtual screen width: " << virtualScreenWidth;
return app.exec();
}
```
这里的QScreen::geometry()返回的是屏幕的几何信息,包括位置和大小,通过width()可以获取屏幕的宽度。
需要注意的是,QGuiApplication::screens()返回的屏幕对象列表是按照连接顺序排列的,因此可以通过遍历列表来计算虚拟屏幕的宽度。
相关问题
qt实现GetSystemMetrics(SM_CXSCREEN)
在 Qt 中,可以使用 QGuiApplication 类的 primaryScreen() 方法获取主屏幕的信息,包括屏幕的分辨率。以下是示例代码:
```cpp
#include <QGuiApplication>
#include <QScreen>
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
QScreen *screen = QGuiApplication::primaryScreen();
QRect screenGeometry = screen->geometry();
int screenWidth = screenGeometry.width();
int screenHeight = screenGeometry.height();
qDebug() << "Screen width:" << screenWidth << "Screen height:" << screenHeight;
return app.exec();
}
```
以上代码会输出主屏幕的宽度和高度。
Sub MoveMouse(ByVal x As Long, ByVal y As Long) Const SM_CXSCREEN As Long = 0 Const SM_CYSCREEN As Long = 1 '获取屏幕分辨率 Dim screenWidth As Long screenWidth = GetSystemMetrics(SM_CXSCREEN) Dim screenHeight As Long screenHeight = GetSystemMetrics(SM_CYSCREEN) '将坐标值映射到屏幕范围内 x = x * screenWidth / 100 y = y * screenHeight / 100 '移动鼠标 SetCursorPos x, y End Sub
This code defines a procedure named "MoveMouse" that moves the cursor on the screen to a specified position. The procedure takes two arguments: "x" and "y", which are the horizontal and vertical coordinates of the desired cursor position, expressed as percentages of the screen width and height, respectively.
The code uses two Windows API constants, SM_CXSCREEN and SM_CYSCREEN, to obtain the screen resolution (in pixels) using the GetSystemMetrics function. The obtained values are stored in the variables "screenWidth" and "screenHeight".
Next, the code maps the percentage coordinates to actual pixel coordinates using simple proportional scaling. The resulting values are then passed to the SetCursorPos function, which moves the cursor to the specified position on the screen.
Note: This code is written in Visual Basic for Applications (VBA), and is intended to be used within a larger VBA macro or application.