Use Rx to select screen position.

sunnyone · May 12, 2015 · 7f02b2e · 7f02b2e
1 parent 33c623f
commit 7f02b2e
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Showing 6 changed files with 101 additions and 152 deletions.
diff --git a/ScreenCaptureWrapper/ScreenCaptureWrapper.csproj b/ScreenCaptureWrapper/ScreenCaptureWrapper.csproj
@@ -49,6 +49,18 @@
     <Reference Include="System" />
     <Reference Include="System.Data" />
     <Reference Include="System.Drawing" />
+    <Reference Include="System.Reactive.Core">
+      <HintPath>..\packages\Rx-Core.2.2.5\lib\net45\System.Reactive.Core.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Reactive.Interfaces">
+      <HintPath>..\packages\Rx-Interfaces.2.2.5\lib\net45\System.Reactive.Interfaces.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Reactive.Linq">
+      <HintPath>..\packages\Rx-Linq.2.2.5\lib\net45\System.Reactive.Linq.dll</HintPath>
+    </Reference>
+    <Reference Include="System.Reactive.PlatformServices">
+      <HintPath>..\packages\Rx-PlatformServices.2.2.5\lib\net45\System.Reactive.PlatformServices.dll</HintPath>
+    </Reference>
     <Reference Include="System.Windows.Forms" />
     <Reference Include="System.Windows.Interactivity, Version=4.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL" />
     <Reference Include="System.Xml" />
@@ -71,10 +83,6 @@
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
     </ApplicationDefinition>
-    <Page Include="SelectPositionWindow.xaml">
-      <SubType>Designer</SubType>
-      <Generator>MSBuild:Compile</Generator>
-    </Page>
     <Page Include="ShellView.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
@@ -90,9 +98,7 @@
     <Compile Include="Preset.cs" />
     <Compile Include="Recorder.cs" />
     <Compile Include="ScreenCaptureConfig.cs" />
-    <Compile Include="SelectPositionWindow.xaml.cs">
-      <DependentUpon>SelectPositionWindow.xaml</DependentUpon>
-    </Compile>
+    <Compile Include="SelectScreenPositionUtil.cs" />
     <Compile Include="ShellView.xaml.cs">
       <DependentUpon>ShellView.xaml</DependentUpon>
     </Compile>

diff --git a/ScreenCaptureWrapper/SelectPositionWindow.xaml b/ScreenCaptureWrapper/SelectPositionWindow.xaml
diff --git a/ScreenCaptureWrapper/SelectPositionWindow.xaml.cs b/ScreenCaptureWrapper/SelectPositionWindow.xaml.cs
diff --git a/ScreenCaptureWrapper/SelectScreenPositionUtil.cs b/ScreenCaptureWrapper/SelectScreenPositionUtil.cs
@@ -0,0 +1,78 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reactive.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Shapes;
+using System.Reactive.Threading.Tasks;
+
+namespace ScreenCaptureWrapper
+{
+    public class SelectScreenPositionUtil
+    {
+        public static Task<Rect> SelectScreenPositionAsync()
+        {
+            var textBlock = new TextBlock()
+            {
+                Foreground = Brushes.White,
+                FontSize = 12,
+                VerticalAlignment = VerticalAlignment.Top,
+                HorizontalAlignment = HorizontalAlignment.Left
+            };
+
+            var border = new Border()
+            {
+                Background = new SolidColorBrush(Color.FromArgb(0x44, 0x99, 0, 0)),
+                BorderBrush = Brushes.Red,
+                BorderThickness = new Thickness(1),
+                Child = textBlock,
+                Visibility = Visibility.Hidden
+            };
+
+            var canvas = new Canvas();
+            canvas.Children.Add(border);
+
+            var window = new Window()
+            {
+                Title = "Select Screen Position", Top = 0, Left = 0, 
+                Width = SystemParameters.VirtualScreenWidth, Height = SystemParameters.VirtualScreenHeight,
+                WindowStyle = WindowStyle.None, Topmost = true, ShowInTaskbar = false, AllowsTransparency = true,
+                Background = new SolidColorBrush(Color.FromArgb(1, 0xff, 0xff, 0xff)),
+                Cursor = Cursors.Cross, Content = canvas
+            };
+
+            var rectObservable = Observable.FromEventPattern<MouseEventArgs>(window, "MouseLeftButtonDown")
+                .Select(ev => ev.EventArgs.GetPosition(window))
+                .CombineLatest(Observable.FromEventPattern<MouseEventArgs>(window, "MouseMove"),
+                   (downPos, ev) => {
+                       var movePos = ev.EventArgs.GetPosition(window);
+                       return new Rect(Math.Min(downPos.X, movePos.X), Math.Min(downPos.Y, movePos.Y),
+                                       Math.Abs(downPos.X - movePos.X), Math.Abs(downPos.Y - movePos.Y));
+                   })
+                .TakeUntil(Observable.FromEventPattern<MouseEventArgs>(window, "MouseLeftButtonUp"));
+
+            rectObservable.Subscribe(r =>
+            {
+                Canvas.SetLeft(border, r.X);
+                Canvas.SetTop(border, r.Y);
+                border.Width = r.Width;
+                border.Height = r.Height;
+                border.Visibility = Visibility.Visible;
+
+                textBlock.Text = string.Format("{0}x{1} ({2:0.0###}, /8={3}x{4})",
+                    r.Width, r.Height, 
+                    r.Height != 0 ? ((double)r.Width) / r.Height : 0,
+                    r.Width / 8.0, r.Height / 8.0);
+            }, window.Close);
+
+            window.Show();
+
+            return rectObservable.ToTask(); // return a last value
+        }
+    }
+}
diff --git a/ScreenCaptureWrapper/ShellViewModel.cs b/ScreenCaptureWrapper/ShellViewModel.cs
@@ -185,18 +185,18 @@ public void SelectFile()
 
         public void PickPosition()
         {
-            SelectPositionWindow.SelectScreenPositionAsync()
+            SelectScreenPositionUtil.SelectScreenPositionAsync()
                 .ContinueWith(t =>
                 {
                     var exception = t.Exception; // HACK: ignore exception
 
                     if (t.Status == TaskStatus.RanToCompletion)
                     {
                         var result = t.Result;
-                        this.VideoX = result.X;
-                        this.VideoY = result.Y;
-                        this.VideoWidth = result.Width;
-                        this.VideoHeight = result.Height;
+                        this.VideoX = (int) result.X;
+                        this.VideoY = (int) result.Y;
+                        this.VideoWidth = (int) result.Width;
+                        this.VideoHeight = (int) result.Height;
                     }
                 });
         }

diff --git a/ScreenCaptureWrapper/packages.config b/ScreenCaptureWrapper/packages.config
@@ -4,5 +4,10 @@
   <package id="Caliburn.Micro.Core" version="2.0.2" targetFramework="net45" />
   <package id="Cottle" version="1.3.1.2" targetFramework="net45" />
   <package id="MSBuildTasks" version="1.4.0.88" targetFramework="net45" />
+  <package id="Rx-Core" version="2.2.5" targetFramework="net45" />
+  <package id="Rx-Interfaces" version="2.2.5" targetFramework="net45" />
+  <package id="Rx-Linq" version="2.2.5" targetFramework="net45" />
+  <package id="Rx-Main" version="2.2.5" targetFramework="net45" />
+  <package id="Rx-PlatformServices" version="2.2.5" targetFramework="net45" />
   <package id="YamlDotNet" version="3.5.1" targetFramework="net45" />
 </packages>