Nil*_*ils 79 c# size wpf xaml screen
我知道我可以通过使用来获得主屏幕的大小
System.Windows.SystemParameters.PrimaryScreenWidth;
System.Windows.SystemParameters.PrimaryScreenHeight;
但是如何获得当前屏幕的大小？(多屏用户并不总是使用主屏幕,并非所有屏幕都使用相同的分辨率,对吧？)
能够从XAML访问大小会很好,但是从代码(C#)这样做就足够了.
Nil*_*ils 68
我从System.Windows.Forms围绕屏幕创建了一个小包装器,目前一切正常......但不确定"设备独立像素".
public class WpfScreen
{
public static IEnumerable<WpfScreen> AllScreens()
{
foreach (Screen screen in System.Windows.Forms.Screen.AllScreens)
{
yield return new WpfScreen(screen);
}
}
public static WpfScreen GetScreenFrom(Window window)
{
WindowInteropHelper windowInteropHelper = new WindowInteropHelper(window);
Screen screen = System.Windows.Forms.Screen.FromHandle(windowInteropHelper.Handle);
WpfScreen wpfScreen = new WpfScreen(screen);
return wpfScreen;
}
public static WpfScreen GetScreenFrom(Point point)
{
int x = (int) Math.Round(point.X);
int y = (int) Math.Round(point.Y);
// are x,y device-independent-pixels ??
System.Drawing.Point drawingPoint = new System.Drawing.Point(x, y);
Screen screen = System.Windows.Forms.Screen.FromPoint(drawingPoint);
WpfScreen wpfScreen = new WpfScreen(screen);
return wpfScreen;
}
public static WpfScreen Primary
{
get { return new WpfScreen(System.Windows.Forms.Screen.PrimaryScreen); }
}
private readonly Screen screen;
internal WpfScreen(System.Windows.Forms.Screen screen)
{
this.screen = screen;
}
public Rect DeviceBounds
{
get { return this.GetRect(this.screen.Bounds); }
}
public Rect WorkingArea
{
get { return this.GetRect(this.screen.WorkingArea); }
}
private Rect GetRect(Rectangle value)
{
// should x, y, width, height be device-independent-pixels ??
return new Rect
{
X = value.X,
Y = value.Y,
Width = value.Width,
Height = value.Height
};
}
public bool IsPrimary
{
get { return this.screen.Primary; }
}
public string DeviceName
{
get { return this.screen.DeviceName; }
}
}
Gui*_*ira 22
在这里budy.这将只给出工作区的宽度和高度
System.Windows.SystemParameters.WorkArea.Width
System.Windows.SystemParameters.WorkArea.Height
sto*_*toj 12
我很欣赏这是一个老问题，但由于 WPF 仍然没有提供一种“开箱即用”的好方法，并且上面的答案似乎有点过于复杂，希望您会发现下面的解决方案更容易一些消化..
享受 ：）
using System.Windows;
using System.Windows.Forms;
using System.Windows.Media;
using Point = System.Drawing.Point;
namespace ClrVpin.Shared
{
public static class WindowExtensions
{
public static Rect GetCurrentScreenWorkArea(this Window window)
{
var screen = Screen.FromPoint(new Point((int) window.Left, (int) window.Top));
var dpiScale = VisualTreeHelper.GetDpi(window);
return new Rect {Width = screen.WorkingArea.Width / dpiScale.DpiScaleX, Height = screen.WorkingArea.Height / dpiScale.DpiScaleY};
}
}
}
我还需要当前的屏幕尺寸，特别是工作区，它返回不包括任务栏宽度的矩形。
我用它来重新定位一个窗口，该窗口向右和向下打开到鼠标所在的位置。由于窗口相当大，在许多情况下它超出了屏幕边界。下面的代码是基于@ej答案：这会给你当前屏幕...。不同之处在于我还展示了我的重新定位算法，我认为这实际上是重点。
编码：
using System.Windows;
using System.Windows.Forms;
namespace MySample
{
public class WindowPostion
{
/// <summary>
/// This method adjust the window position to avoid from it going
/// out of screen bounds.
/// </summary>
/// <param name="topLeft">The requiered possition without its offset</param>
/// <param name="maxSize">The max possible size of the window</param>
/// <param name="offset">The offset of the topLeft postion</param>
/// <param name="margin">The margin from the screen</param>
/// <returns>The adjusted position of the window</returns>
System.Drawing.Point Adjust(System.Drawing.Point topLeft, System.Drawing.Point maxSize, int offset, int margin)
{
Screen currentScreen = Screen.FromPoint(topLeft);
System.Drawing.Rectangle rect = currentScreen.WorkingArea;
// Set an offset from mouse position.
topLeft.Offset(offset, offset);
// Check if the window needs to go above the task bar,
// when the task bar shadows the HUD window.
int totalHight = topLeft.Y + maxSize.Y + margin;
if (totalHight > rect.Bottom)
{
topLeft.Y -= (totalHight - rect.Bottom);
// If the screen dimensions exceed the hight of the window
// set it just bellow the top bound.
if (topLeft.Y < rect.Top)
{
topLeft.Y = rect.Top + margin;
}
}
int totalWidth = topLeft.X + maxSize.X + margin;
// Check if the window needs to move to the left of the mouse,
// when the HUD exceeds the right window bounds.
if (totalWidth > rect.Right)
{
// Since we already set an offset remove it and add the offset
// to the other side of the mouse (2x) in addition include the
// margin.
topLeft.X -= (maxSize.X + (2 * offset + margin));
// If the screen dimensions exceed the width of the window
// don't exceed the left bound.
if (topLeft.X < rect.Left)
{
topLeft.X = rect.Left + margin;
}
}
return topLeft;
}
}
}
一些解释：
1) topLeft - position of the top left at the desktop (works
for multi screens - with different aspect ratio).
Screen1 Screen2
? ?????????????????????????????????????????? Screen3
? ? ?? ???????????????????? ?
? ? ?? ?? ?- ? ?
1080 ? ? ?? ?? ? ?
? ? ?? ?? ? ? 900
? ? ?? ?? ? ?
? ????????????????????????????????????????????????????????????? ?
????????? ????????? ????????
?????????????????????????????????????????????????????????????
1920 1920 1440
If the mouse is in Screen3 a possible value might be:
topLeft.X=4140 topLeft.Y=195
2) offset - the offset from the top left, one value for both
X and Y directions.
3) maxSize - the maximal size of the window - including its
size when it is expanded - from the following example
we need maxSize.X = 200, maxSize.Y = 150 - To avoid the expansion
being out of bound.
Non expanded window:
???????????????????????????????? ?
? Window Name [X]? ?
???????????????????????????????? ?
? ??????????????????? ? ? 100
? Text1: ? ? ? ?
? ??????????????????? ? ?
? [?] ? ?
???????????????????????????????? ?
????????????????????????????????
200
Expanded window:
???????????????????????????????? ?
? Window Name [X]? ?
???????????????????????????????? ?
? ??????????????????? ? ?
? Text1: ? ? ? ?
? ??????????????????? ? ? 150
? [?] ? ?
? ??????????????????? ? ?
? Text2: ? ? ? ?
? ??????????????????? ? ?
???????????????????????????????? ?
????????????????????????????????
200
4) margin - The distance the window should be from the screen
work-area - Example:
??????????????????????????????????????????????????????????????? ?
? ? ? Margin
? ? ?
? ?
? ?
? ?
? ???????????????????????????????? ?
? ? Window Name [X]? ?
? ???????????????????????????????? ?
? ? ??????????????????? ? ?
? ? Text1: ? ? ? ?
? ? ??????????????????? ? ?
? ? [?] ? ?
? ? ??????????????????? ? ?
? ? Text2: ? ? ? ?
? ? ??????????????????? ? ?
? ???????????????????????????????? ? ?
? ? ? Margin
??????????????????????????????????????????????????????????????? ?
?[start] [?][?][?][?] ?en? 12:00 ?
???????????????????????????????????????????????????????????????
????? ?????
Margin Margin
* Note that this simple algorithm will always want to leave the cursor
out of the window, therefor the window will jumps to its left:
??????????????????????????????????? ???????????????????????????????????
? ?-???????????????? ? ?????????????????- ?
? ? Window [X]? ? ? Window [X]? ?
? ???????????????? ? ???????????????? ?
? ? ????? ? ? ? ????? ? ?
? ? Val: ? ? ? -> ? ? Val: ? ? ? ?
? ? ????? ? ? ? ????? ? ?
? ???????????????? ? ???????????????? ?
? ? ? ?
??????????????????????????????????? ???????????????????????????????????
?[start] [?][?][?] ?en? 12:00 ? ?[start] [?][?][?] ?en? 12:00 ?
??????????????????????????????????? ???????????????????????????????????
If this is not a requirement, you can add a parameter to just use
the margin:
??????????????????????????????????? ???????????????????????????????????
? ?-???????????????? ? ???-???????????? ?
? ? Window [X]? ? ? Window [X]? ?
? ???????????????? ? ???????????????? ?
? ? ????? ? ? ? ????? ? ?
? ? Val: ? ? ? -> ? ? Val: ? ? ? ?
? ? ????? ? ? ? ????? ? ?
? ???????????????? ? ???????????????? ?
? ? ? ?
??????????????????????????????????? ???????????????????????????????????
?[start] [?][?][?] ?en? 12:00 ? ?[start] [?][?][?] ?en? 12:00 ?
??????????????????????????????????? ???????????????????????????????????
* Supports also the following scenarios:
1) Screen over screen:
???????????????????
? ?
? ?
? ?
? ?
???????????????????
?????????????????????
? ?
? ?- ?
? ?
? ?
? ?
?????????????????????
?????????
2) Window bigger than screen hight or width
??????????????????????????????????? ???????????????????????????????????
? ? ? ???????????????? ?
? ? ? ? Window [X]? ?
? ?-???????????????? ? ???????????????? ?- ?
? ? Window [?]? ? ? ????? ? ?
? ???????????????? -> ? ? Val: ? ? ? ?
? ? ?????? ? ? ? ????? ? ?
? ? Val: ? ?? ? ? ? ????? ? ?
? ? ?????? ? ? ? Val: ? ? ? ?
??????????????????????????????????? ? ???????????????????????????????????
?[start] [?][?][?] ?en? 12:00 ? ? ?[start] [?][?][?] ?en? 12:00 ?
??????????????????????????????????? ? ???????????????????????????????????
? ????? ? ? ????? ?
? Val: ? ? ? ????????????????
? ????? ?
????????????????
??????????????????????????????????? ???????????????????????????????????
? ? ? ?
? ? ? ?????????????????????????????????????
? ?-????????????????????????????????????? ? ? W?-dow ?[X]?
? ? Window ? [X]? ? ?????????????????????????????????????
? ????????????????????????????????????? ? ? ????? ????? ????? ?
? ? ????? ????? ? ????? ? -> ? ? Val: ? ? Val: ? ? Val: ? ? ? ?
? ? Val: ? ? Val: ? ? Va?: ? ? ? ? ? ????? ????? ????? ?
? ? ????? ????? ? ????? ? ? ?????????????????????????????????????
???????????????????????????????????????????? ???????????????????????????????????
?[start] [?][?][?] ?en? 12:00 ? ?[start] [?][?][?] ?en? 12:00 ?
??????????????????????????????????? ???????????????????????????????????
<remark><code>...</code></remark>这将为您提供基于窗口左上角的当前屏幕,只需调用this.CurrentScreen()即可获取当前屏幕上的信息.
using System.Windows;
using System.Windows.Forms;
namespace Common.Helpers
{
public static class WindowHelpers
{
public static Screen CurrentScreen(this Window window)
{
return Screen.FromPoint(new System.Drawing.Point((int)window.Left,(int)window.Top));
}
}
}
小智 5
花点时间浏览SystemParameters成员.
这些甚至考虑了屏幕的相对位置.
仅使用两台显示器进行测试
小智 5
为什么不直接使用这个呢？
var interopHelper = new WindowInteropHelper(System.Windows.Application.Current.MainWindow);
var activeScreen = Screen.FromHandle(interopHelper.Handle);
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