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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