Created
May 10, 2014 21:24
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Save and restore a Window's Position, Size and State
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using System; | |
using System.Collections.Generic; | |
using System.Linq; | |
using System.Text; | |
using System.Windows; | |
namespace WindowStateSave | |
{ | |
/// <summary> | |
/// Helper class that saves the window's state to a User Settings string | |
/// Setting for each window (based on it's className) must be created in the Project's Properties window | |
/// Usage: `new WindowStateSaveHelper(MyWindow);` | |
/// </summary> | |
public class WindowStateSaveHelper | |
{ | |
private Window _window; | |
private string _windowName; | |
public WindowStateSaveHelper(Window window) | |
{ | |
_window = window; | |
_windowName = _window.GetType().Name; | |
_window.Loaded += LoadedEventHandler; | |
_window.Closed += ClosedEventHandler; | |
} | |
private void LoadedEventHandler(object sender, RoutedEventArgs e) | |
{ | |
string s = (string)Properties.Settings.Default[_windowName]; | |
WState w = StringToState(s); | |
if (w == null) return; | |
SizeToFit(w); | |
MoveIntoView(w); | |
_window.Left = w.Left; | |
_window.Top = w.Top; | |
_window.Width = w.Width; | |
_window.Height = w.Height; | |
_window.WindowState = w.WindowState; | |
} | |
private void ClosedEventHandler(object sender, EventArgs e) | |
{ | |
if (_window.WindowState == WindowState.Minimized) return; | |
WState w = new WState(); | |
w.Left = _window.Left; | |
w.Top = _window.Top; | |
w.Width = _window.Width; | |
w.Height = _window.Height; | |
w.WindowState = _window.WindowState; | |
Properties.Settings.Default[_windowName] = StateToString(w); | |
Properties.Settings.Default.Save(); | |
} | |
private string StateToString(WState state) | |
{ | |
var s = new object[] | |
{ | |
state.Left.ToString(), | |
state.Top.ToString(), | |
state.Width.ToString(), | |
state.Height.ToString(), | |
state.WindowState.ToString() | |
}; | |
return String.Join(",", s); | |
} | |
private WState StringToState(string state) | |
{ | |
var s = state.Split(new char[]{','}, 5, StringSplitOptions.RemoveEmptyEntries); | |
try | |
{ | |
WState w = new WState() | |
{ | |
Left = double.Parse(s[0]), | |
Top = double.Parse(s[1]), | |
Width = double.Parse(s[2]), | |
Height = double.Parse(s[3]), | |
WindowState = (WindowState)Enum.Parse(typeof(WindowState), s[4]) | |
}; | |
return w; | |
} | |
catch { return null; } | |
} | |
// Based on http://www.codeproject.com/Articles/50761/Save-and-Restore-WPF-Window-Size-Position-and-or-S | |
private void SizeToFit(WState state) | |
{ | |
if (state.Height > SystemParameters.VirtualScreenHeight) | |
{ | |
state.Height = SystemParameters.VirtualScreenHeight; | |
} | |
if (state.Width > SystemParameters.VirtualScreenWidth) | |
{ | |
state.Width = SystemParameters.VirtualScreenWidth; | |
} | |
} | |
private void MoveIntoView(WState state) | |
{ | |
if (state.Top + state.Height / 2 > SystemParameters.VirtualScreenHeight + SystemParameters.VirtualScreenTop) | |
{ | |
state.Top = SystemParameters.VirtualScreenHeight + SystemParameters.VirtualScreenTop - state.Height; | |
} | |
if (state.Left + state.Width / 2 > SystemParameters.VirtualScreenWidth + SystemParameters.VirtualScreenLeft) | |
{ | |
state.Left = SystemParameters.VirtualScreenWidth + SystemParameters.VirtualScreenLeft - state.Width; | |
} | |
if (state.Top < SystemParameters.VirtualScreenTop) | |
{ | |
state.Top = SystemParameters.VirtualScreenTop; | |
} | |
if (state.Left < SystemParameters.VirtualScreenLeft) | |
{ | |
state.Left = SystemParameters.VirtualScreenLeft; | |
} | |
} | |
} | |
class WState | |
{ | |
public double Left { get; set; } | |
public double Top { get; set; } | |
public double Width { get; set; } | |
public double Height { get; set; } | |
public WindowState WindowState { get; set; } | |
} | |
} |
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