ScreenToGif 代码分析

ScreenToGif项目由四个文件夹组成：

1. Files 存放协议文件
2. GifRecorder 存放gif编码器代码
3. ScreenToGif 存放主代码
4. Other 存放Hooktest和Translator的代码

问题1：GifRecorder 和ScreenToGif、Hooktest、Translator 下面都有了一个Properties，里面有个AssemblyInfo.cs是什么东西？

.net工程的Properties文件夹下自动生成一个名为AssemblyInfo.cs的文件，一般情况下我们很少直接改动该文件。但我们实际上通过另一个形式操作该文件。那就是通过在鼠标右键点击项目的属性进入“应用程序”->“程序集信息”，然后修改信息。

程序集指的是DLL或者EXE等可执行文件。

问题2：启动界面分析

<Window x:Class="ScreenToGif.Windows.Other.Startup"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:n="clr-namespace:ScreenToGif.Controls"

xmlns:u="clr-namespace:ScreenToGif.Util"

Title="{DynamicResource Title.StartUp}" Height="220" Width="500" Icon="/Resources/Logo.ico" WindowStartupLocation="CenterScreen"

MinWidth="500" MinHeight="220" UseLayoutRounding="True" Loaded="Startup_OnLoaded">

<Window.CommandBindings>

<CommandBinding Command="u:Commands.NewRecording" CanExecute="Buttons_CanExecute" Executed="Recorder_Executed"/>

<CommandBinding Command="u:Commands.NewWebcamRecording" CanExecute="Buttons_CanExecute" Executed="WebcamRecorder_Executed"/>

<CommandBinding Command="u:Commands.NewBoardRecording" CanExecute="Buttons_CanExecute" Executed="Board_Executed"/>

<CommandBinding Command="u:Commands.Editor" CanExecute="Buttons_CanExecute" Executed="Editor_Executed"/>

<CommandBinding Command="u:Commands.Update" CanExecute="Update_CanExecute" Executed="Update_Executed"/>

<CommandBinding Command="u:Commands.Options" CanExecute="Buttons_CanExecute" Executed="Options_Executed"/>

<!--Command后面是命令的名字，实际执行的函数是executed里写的函数 其他控件必须指明command这个属性

应用场景是菜单栏和工具栏的功能相同，我们要将其映射到同一个command。还有就是一个控件禁用后，相同功能的控件也要一起被禁用，这有CanExecute 来帮助同步，同时可用，或者同时不可用->

</Window.CommandBindings>

<Grid>

<Grid.RowDefinitions>   <!--行定义-->

<RowDefinition Height="45"/>

<RowDefinition />

</Grid.RowDefinitions>

<Grid Grid.Row="0">

<Grid.ColumnDefinitions>   <!--列定义-->

<ColumnDefinition/>

<ColumnDefinition Width="Auto"/>

<ColumnDefinition Width="Auto"/>

<ColumnDefinition Width="Auto"/>

</Grid.ColumnDefinitions>

<Label Grid.Column="0" Content="ScreenToGif" Margin="5" FontSize="18" Foreground="#FF251E46" Effect="{DynamicResource Shadow.Black.Small}"/>

<!--<n:ImageButton Grid.Column="1" x:Name="BoardButton2" Text="Test" Content="{StaticResource Vector.Info}"

Margin="5" Style="{StaticResource Style.Button.Horizontal}" Effect="{StaticResource Shadow.Foreground.Small}"

Padding="3" MaxSize="25" Click="TestButton_OnClick" Visibility="Collapsed"/>-->

<TextBlock Grid.Column="1" Name="UpdateTextBlock" VerticalAlignment="Center" Visibility="Hidden" Effect="{StaticResource Shadow.Black.Small}">

<!--WPF Visibility的用法 Visible 元素在窗体中正常显示 Collaspsed 元素不显示，也不占用空间 Hidden 元素不显示，但是任然为它保留空间 -->

<Hyperlink Command="u:Commands.Update" ToolTip="{DynamicResource NewRelease.Tooltip}" Cursor="Hand">

<Run Name="UpdateRun" Text="{DynamicResource NewRelease}"/>

<!--run指明一连串格式化的或者格式化的内联文本，类似html的<span>-->

</Hyperlink>

</TextBlock>

<n:ImageButton Grid.Column="3" x:Name="OptionsButton" Text="{DynamicResource Options}" Content="{StaticResource Vector.Options}"

Margin="5" Style="{StaticResource Style.Button.Horizontal}" Effect="{StaticResource Shadow.Black.Small}"

Padding="2" MaxSize="25" Command="u:Commands.Options"/>

<!--Effect是简单的像素处理 content属性显示图片  text 显示文本-->

</Grid>

<Grid Grid.Row="1">

<Grid.ColumnDefinitions>

<ColumnDefinition/>

<ColumnDefinition/>

<ColumnDefinition/>

<ColumnDefinition/>

</Grid.ColumnDefinitions>

<n:ImageButton Grid.Column="0" x:Name="RecordButton" Text="{DynamicResource Recorder}" Margin="5,0,5,5"

Effect="{StaticResource Shadow.Black.Tiny}" MaxSize="36" Content="{StaticResource Vector.Record.New}"

Command="u:Commands.NewRecording" Style="{StaticResource Style.Button.Vertical.Border}" FontSize="13">

<n:ImageButton.ToolTip>

<n:HeaderedTooltip Header="{DynamicResource Recorder}" Text="{DynamicResource Tooltip.Recorder}"

MaxWidth="250" Placement="Bottom" HorizontalOffset="-5"/>

</n:ImageButton.ToolTip>

</n:ImageButton>

<n:ImageButton Grid.Column="1" x:Name="WebcamButton" Text="{DynamicResource Webcam}" Margin="5,0,5,5"

Effect="{StaticResource Shadow.Black.Tiny}" MaxSize="36" Content="{StaticResource Vector.Camera.New}"

Command="u:Commands.NewWebcamRecording" Style="{StaticResource Style.Button.Vertical.Border}" FontSize="13">

<n:ImageButton.ToolTip>

<n:HeaderedTooltip Header="{DynamicResource Webcam}" Text="{DynamicResource Tooltip.Webcam}" MaxWidth="250" Placement="Bottom" HorizontalOffset="-5"/>

</n:ImageButton.ToolTip>

</n:ImageButton>

<n:ImageButton Grid.Column="2" x:Name="BoardButton" Text="{DynamicResource Board}" Margin="5,0,5,5"

Effect="{StaticResource Shadow.Black.Tiny}" MaxSize="36" Content="{StaticResource Vector.Board.New}"

Command="u:Commands.NewBoardRecording" Style="{StaticResource Style.Button.Vertical.Border}" FontSize="13">

<n:ImageButton.ToolTip>

<n:HeaderedTooltip Header="{DynamicResource Board}" Text="{DynamicResource Tooltip.Board}" MaxWidth="250" Placement="Bottom" HorizontalOffset="-5"/>

</n:ImageButton.ToolTip>

</n:ImageButton>

<n:ImageButton Grid.Column="3" x:Name="EditorButton" Text="{DynamicResource Editor}" Margin="5,0,5,5"

Effect="{StaticResource Shadow.Black.Tiny}" MaxSize="35" Content="{StaticResource Vector.Editor}"

Command="u:Commands.Editor" Style="{StaticResource Style.Button.Vertical.Border}" FontSize="13">

<n:ImageButton.ToolTip>

<n:HeaderedTooltip Header="{DynamicResource Editor}" Text="{DynamicResource Tooltip.Editor}" MaxWidth="250" Placement="Bottom" HorizontalOffset="-5"/>

</n:ImageButton.ToolTip><!---这有一个浮动提示->

</n:ImageButton>

</Grid>

</Grid>

</Window>

问题3：使用的静态资源和动态资源是怎么个原理？

静态资源指该资源只在程序载入内存时一次性使用，之后都不会改变。动态资源是相反的概念。

资源的四个层级？

1. 数据库中的资源 ，相当于仓库
2. 资源文件中的资源，相当于旅行箱
3. Wpf 对象资源，相当于背包
4. 变量中的数据，相当于手里

什么是wpf对象资源？

使用window.Rescources标签下的ResourceDictionary标签夹住的资源

<Window.Resources>

<ResourceDictionary>  <!--这个ResourceDictionary标签可以省略-->

<sys:String x:Key=”str”>

我是一个资源

</sys:String>

</ResourceDictionary>

</WIndow.Rescources>

<TextBlock Text=”{StaticResource ResourceKey=str}”  <!--这一行的ResourceKey=可以不写-->

这是在xaml中引用，如何在程序中引用呢？

string text = (string) this.FindResource(“str”)//资源中的文件要自己来进行格式转换

使用标签引用和程序中的FindResource引用会在当前控件的Resource属性中查找，如果找不到，就会找上一级的。

如果得知就是引用当前的，可以使用string text = (string) this.Resources[“str”]

将资源程序写到外部文件，如何在程序中引用？

<window.Resources>

<ResourceDictionary Source=”xxx.xaml”/>

</window.Resources>

静态资源和动态资源中的静态和动态不是描述资源的，描述控件行为的，也说明改资源项是否可以被外部改写（类似xml的改写），只载入一次，之后永远不变，还是可以动态的变化。

对于动态资源可以使用this.Resoures[“res2”]=new TextBlock(){text=”我要改变了”} ，静态资源不理会对资源的重新赋值

<window.Resources>

<TextBlock x:Key=”res2” text=”我是一只鸡”/>

</window.Resources>

<Button  content=”{DynamicResources res2}”/>

问题4：一个界面文件，是如何调用另外一个界面文件的？

比如在ScreenToGif这个项目中，有个Windows文件夹，下面有个Other文件，里面有个ColorSelector.xaml，如何在其他界面文件中使用呢？

步骤：

1. 添加对该目录的引用using ScreenToGif.Windows.Other;，不然你需要写完整目录
2. 书写代码

var colorPicker = new ColorSelector(UserSettings.All.BoardColor) { Owner = this };

var result = colorPicker.ShowDialog();

问题5： style属性是什么东西？

http://blog.csdn.net/aoshilang2249/article/details/45129365

《深入浅出WPF》 深入浅出话模板

问题6：录制屏幕界面分析

<n:LightWindow x:Name="RecorderLightWindow" x:Class="ScreenToGif.Windows.Recorder"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:n="clr-namespace:ScreenToGif.Controls"

xmlns:u="clr-namespace:ScreenToGif.Util"

xmlns:c="clr-namespace:ScreenToGif.Util.Converters"

Title="ScreenToGif" SnapsToDevicePixels="True" UseLayoutRounding="True" AllowsTransparency="True" WindowStyle="None"

Topmost="True" Icon="../Resources/Logo.ico" Child="{StaticResource Vector.Back}"

IsThin="{Binding RecorderThinMode, Source={x:Static u:UserSettings.All}}"

IsFullScreen="{Binding FullScreenMode, Source={x:Static u:UserSettings.All}}"

Width="{Binding Source={x:Static u:UserSettings.All}, Path=RecorderWidth, Mode=TwoWay}"

Height="{Binding Source={x:Static u:UserSettings.All}, Path=RecorderHeight, Mode=TwoWay}"

Left="{Binding Source={x:Static u:UserSettings.All}, Path=RecorderLeft, Mode=TwoWay}"

Top="{Binding Source={x:Static u:UserSettings.All}, Path=RecorderTop, Mode=TwoWay}"

FocusManager.FocusedElement="{Binding RelativeSource={x:Static RelativeSource.Self}, Mode=OneTime}"

Foreground="{Binding Source={x:Static u:UserSettings.All}, Path=RecorderForeground, Mode=TwoWay, Converter={StaticResource ColorToBrush}}"

Background="{Binding Source={x:Static u:UserSettings.All}, Path=RecorderBackground, Mode=TwoWay, Converter={StaticResource ColorToBrush}}"

SizeChanged="LightWindow_SizeChanged" Loaded="Recorder_Loaded" Closing="Window_Closing" LocationChanged="Window_LocationChanged">

<Window.Resources>

<Storyboard x:Key="ShowDiscardStoryboard">

<BooleanAnimationUsingKeyFrames Storyboard.TargetName="DiscardButton" Storyboard.TargetProperty="IsHitTestVisible" Duration="0:0:0" >

<DiscreteBooleanKeyFrame Value="True" KeyTime="0:0:0"/>

</BooleanAnimationUsingKeyFrames>

<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DiscardButton" Storyboard.TargetProperty="Visibility" Duration="0:0:0">

<DiscreteObjectKeyFrame Value="{x:Static Visibility.Visible}" KeyTime="0:0:0"/>

</ObjectAnimationUsingKeyFrames>

<DoubleAnimation Storyboard.TargetName="DiscardButton" Storyboard.TargetProperty="(Button.Opacity)" From="0" To="1" Duration="0:0:1">

<DoubleAnimation.EasingFunction>

<PowerEase Power="8" />

</DoubleAnimation.EasingFunction>

</DoubleAnimation>

</Storyboard>

<Storyboard x:Key="HideDiscardStoryboard">

<BooleanAnimationUsingKeyFrames Storyboard.TargetName="DiscardButton" Storyboard.TargetProperty="IsHitTestVisible" Duration="0:0:0" >

<DiscreteBooleanKeyFrame Value="False" KeyTime="0:0:0"/>

</BooleanAnimationUsingKeyFrames>

<ObjectAnimationUsingKeyFrames Storyboard.TargetName="DiscardButton" Storyboard.TargetProperty="Visibility" Duration="0:0:0">

<DiscreteObjectKeyFrame Value="{x:Static Visibility.Collapsed}" KeyTime="0:0:0"/>

</ObjectAnimationUsingKeyFrames>

<DoubleAnimation Storyboard.TargetName="DiscardButton" Storyboard.TargetProperty="(Button.Opacity)"

From="{Binding ElementName=DiscardButton,Path=Opacity}" To="0" Duration="0:0:1">

<DoubleAnimation.EasingFunction>

<PowerEase Power="8" />

</DoubleAnimation.EasingFunction>

</DoubleAnimation>

</Storyboard>

<c:StageToButtonString x:Key="StageToButtonStringConverter"/>

<c:StageToCanvas x:Key="StageToCanvasConverter"/>

<c:ShortcutKeys x:Key="ShortcutKeys"/>

<c:InvertedBoolToVisibility x:Key="InvertedBoolToVisibility"/>

<c:BoolOrToInvertedVisibility x:Key="BoolOrToInvertedVisibility"/>

<c:IntToString x:Key="IntToStringConverter"/>

</Window.Resources>

<Window.CommandBindings><!--命令关联，命令前是否可以执行该命令，命令后要做什么-->

<CommandBinding Command="u:Commands.Options" CanExecute="Options_CanExecute" Executed="Options_Executed"/>

<CommandBinding Command="u:Commands.EnableSnapshot" CanExecute="EnableSnapshot_CanExecute" Executed="EnableSnapshot_Executed"/>

<CommandBinding Command="u:Commands.EnableThinMode" CanExecute="EnableThinMode_CanExecute" Executed="EnableThinMode_Executed"/>

<CommandBinding Command="u:Commands.EnableFullScreen" CanExecute="EnableFullScreen_CanExecute" Executed="EnableFullScreen_Executed"/>

<CommandBinding Command="u:Commands.EnableSnapToWindow" CanExecute="SnapToWindow_CanExecute"/>

</Window.CommandBindings>

<Grid x:Name="OutterGrid" UseLayoutRounding="True">

<Grid.RowDefinitions>

<RowDefinition Height="*"/>

<RowDefinition Height="31"/>

</Grid.RowDefinitions>

<!--Hollow part-->

<Border BorderBrush="{Binding ElementName=RecorderLightWindow, Path=BorderBrush}" BorderThickness="{Binding ElementName=RecorderLightWindow, Path=BorderThickness}"/>

<!--Command bar-->

<Grid Grid.Row="1" x:Name="LowerGrid" Height="31" VerticalAlignment="Bottom" Background="{Binding ElementName=RecorderLightWindow, Path=Background}"

KeyboardNavigation.TabNavigation="Cycle" MouseLeftButtonDown="CommandGrid_MouseLeftButtonDown">

<Grid.ColumnDefinitions>

<ColumnDefinition Width="Auto"/>

<ColumnDefinition/>

</Grid.ColumnDefinitions>

<Grid Grid.Column="0" Visibility="{Binding RecorderThinMode, Source={x:Static u:UserSettings.All}, Converter={StaticResource Bool2Visibility}}">

<Grid.RowDefinitions>

<RowDefinition/>

<RowDefinition/>

</Grid.RowDefinitions>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="Auto"/>

<ColumnDefinition Width="Auto"/>

</Grid.ColumnDefinitions>

<n:ImageButton Grid.Row="0" Grid.Column="0" x:Name="BackButton" Content="{StaticResource Vector.Back}" Style="{StaticResource Style.Button.NoText}"

ContentHeight="14" Padding="4,1" TabIndex="0" Click="BackButton_Click"/>

<n:ImageButton Grid.Row="1" Grid.Column="0" x:Name="CloseButton" Content="{StaticResource Vector.Close}" Style="{StaticResource Style.Button.NoText}"

ContentHeight="10" Padding="4,1" TabIndex="1" Click="CloseButton_Click"/>

<TextBlock Grid.Row="0" Grid.Column="1" x:Name="CaptionText" Text="{Binding Title, ElementName=RecorderLightWindow}" FontFamily="Segoe UI" FontSize="12"

FontWeight="Regular" Margin="5,0,0,0" Foreground="#FF6F5252" Effect="{DynamicResource Shadow.Foreground.Small}"/>

<TextBlock Grid.Row="1" Grid.Column="1" x:Name="FrameCountTextBlock" Text="{Binding FrameCount, ElementName=RecorderLightWindow, Converter={StaticResource IntToStringConverter}}"

FontFamily="Segoe UI" FontSize="12" FontWeight="Regular" Margin="5,0,0,0" Foreground="#FF061E87" Effect="{DynamicResource Shadow.Foreground.Small}"/>

</Grid>

<StackPanel Grid.Column="1" x:Name="ControlStackPanel" Height="31" Orientation="Horizontal" HorizontalAlignment="Right"

ScrollViewer.VerticalScrollBarVisibility="Disabled">

<n:ImageButton x:Name="SnapButton" Content="{StaticResource Vector.Crosshair}" Margin="0" Style="{StaticResource Style.Button.NoText}"

HorizontalContentAlignment="Center" Effect="{StaticResource Shadow.Foreground.Small}" ContentHeight="20" ContentWidth="20"

Visibility="{Binding FullScreenMode, Source={x:Static u:UserSettings.All}, Converter={StaticResource InvertedBoolToVisibility}}"

Command="u:Commands.EnableSnapToWindow" Padding="3" TabIndex="2" PreviewMouseDown="SnapButton_PreviewMouseDown">

<n:ImageButton.ToolTip>

<ToolTip HorizontalOffset="-5" Placement="Bottom" Content="{DynamicResource Recorder.SnapToWindow}"/>

</n:ImageButton.ToolTip>

</n:ImageButton>

<n:ImageButton x:Name="OptionsButton" Content="{StaticResource Vector.Options}" Margin="0" Style="{StaticResource Style.Button.NoText}"

Effect="{StaticResource Shadow.Foreground.Small}" ContentHeight="20" ContentWidth="20" Command="u:Commands.Options" Padding="3" TabIndex="3">

<n:ImageButton.ToolTip>

<ToolTip HorizontalOffset="-5" Placement="Bottom" Content="{DynamicResource Options}"/>

</n:ImageButton.ToolTip>

</n:ImageButton>

<Separator Width="1" Margin="5,2"/>

<Viewbox Stretch="UniformToFill" ClipToBounds="True" Focusable="False">

<Viewbox.Visibility>

<MultiBinding Converter="{StaticResource BoolOrToInvertedVisibility}">

<Binding Path="RecorderThinMode" Source="{x:Static u:UserSettings.All}"/>

<Binding Path="SnapshotMode" Source="{x:Static u:UserSettings.All}"/>

</MultiBinding>

</Viewbox.Visibility>

<Grid HorizontalAlignment="Center" VerticalAlignment="Center" FlowDirection="LeftToRight" Margin="-4">

<n:CircularProgressBar StrokeThickness="2" Percentage="100" SegmentColor="Gray" Radius="24" IsTabStop="False"/>

<n:CircularProgressBar StrokeThickness="22" Percentage="100" SegmentColor="#FFF0F1F1" Radius="10" IsTabStop="False"/>

<n:CircularProgressBar StrokeThickness="2" Value="{Binding ElementName=FpsIntegerUpDown, Path=Value, Mode=OneWay}"

IsInverted="True" Minimum="1" Maximum="60" SegmentColor="#FFE28A73" Radius="24" IsTabStop="False"/>

<n:CircularProgressBar StrokeThickness="22" Value="{Binding ElementName=FpsIntegerUpDown, Path=Value, Mode=OneWay}"

IsInverted="True" Minimum="1" Maximum="60" SegmentColor="#FFE28A73" Radius="10" IsTabStop="False"/>

</Grid>

<Viewbox.ToolTip>

<ToolTip HorizontalOffset="-5" Placement="Bottom" Content="{DynamicResource Recorder.FpsRange}"/>

</Viewbox.ToolTip>

</Viewbox>

<n:IntegerUpDown x:Name="FpsIntegerUpDown" Margin="1,3" StepValue="1" Minimum="1" Maximum="60" MinWidth="45" TabIndex="4"

Value="{Binding Source={x:Static u:UserSettings.All}, Path=LatestFps, Mode=TwoWay}"

Visibility="{Binding SnapshotMode, Source={x:Static u:UserSettings.All}, Converter={StaticResource InvertedBoolToVisibility}}">

<n:IntegerUpDown.ToolTip>

<ToolTip HorizontalOffset="-5" Placement="Bottom" Content="{DynamicResource Recorder.Fps}"/>

</n:IntegerUpDown.ToolTip>

</n:IntegerUpDown>

<Label Content="{StaticResource Recorder.Fps.Short}" FontSize="12" FontFamily="Segoe UI" Margin="1,0,0,0" VerticalContentAlignment="Center" Padding="0"

Foreground="{Binding ElementName=RecorderLightWindow, Path=Foreground}" Visibility="{Binding SnapshotMode, Source={x:Static u:UserSettings.All}, Converter={StaticResource InvertedBoolToVisibility}}"/>

<Separator Width="1" Margin="5,2" Visibility="{Binding SnapshotMode, Source={x:Static u:UserSettings.All}, Converter={StaticResource InvertedBoolToVisibility}}"/>

<!--<Viewbox Child="{StaticResource Vector.WidthHeight}" Stretch="UniformToFill" Margin="3,4" HorizontalAlignment="Right" FlowDirection="LeftToRight" SnapsToDevicePixels="True"

Visibility="{Binding RecorderThinMode, Converter={StaticResource InvertedBoolToVisibility}, Source={x:Static u:UserSettings.All}}"/>-->

<n:IntegerBox x:Name="WidthIntegerBox" Value="{Binding Source={x:Static u:UserSettings.All}, Path=RecorderWidth, Mode=TwoWay}"

Offset="{x:Static u:Constants.HorizontalOffset}" Minimum="100" Maximum="3000" TabIndex="6" Height="Auto" Padding="4,0" Margin="1,3"

ToolTip="{DynamicResource Recorder.Width}" ToolTipService.Placement="Bottom" ToolTipService.HorizontalOffset="-5"

Visibility="{Binding FullScreenMode, Source={x:Static u:UserSettings.All}, Converter={StaticResource InvertedBoolToVisibility}}"/>

<Label Content="×" FontSize="16" FontFamily="Segoe Script" Margin="1" VerticalContentAlignment="Center" Padding="0"

Foreground="{Binding ElementName=RecorderLightWindow, Path=Foreground}"

Visibility="{Binding FullScreenMode, Source={x:Static u:UserSettings.All}, Converter={StaticResource InvertedBoolToVisibility}}"/>

<n:IntegerBox x:Name="HeightIntegerBox" Value="{Binding Source={x:Static u:UserSettings.All}, Path=RecorderHeight, Mode=TwoWay}"

Offset="{x:Static u:Constants.VerticalOffset}" Minimum="100" Maximum="3000" TabIndex="7" Height="Auto" Padding="4,0" Margin="1,3"

ToolTip="{DynamicResource Recorder.Height}" ToolTipService.Placement="Bottom" ToolTipService.HorizontalOffset="-5"

Visibility="{Binding FullScreenMode, Source={x:Static u:UserSettings.All}, Converter={StaticResource InvertedBoolToVisibility}}"/>

<Label Content="px" FontSize="12" FontFamily="Segoe UI" Margin="1,0,0,0" VerticalContentAlignment="Center" Padding="0"

Foreground="{Binding ElementName=RecorderLightWindow, Path=Foreground}"

Visibility="{Binding FullScreenMode, Source={x:Static u:UserSettings.All}, Converter={StaticResource InvertedBoolToVisibility}}"/>

<Separator Width="1" Margin="5,2" Visibility="{Binding FullScreenMode, Source={x:Static u:UserSettings.All}, Converter={StaticResource InvertedBoolToVisibility}}"/>

<n:ImageButton x:Name="DiscardButton" Text="{DynamicResource Recorder.Discard}" Content="{StaticResource Vector.Remove}" Visibility="Collapsed"

Click="DiscardButton_Click" Style="{StaticResource Style.Button.Horizontal}"

Foreground="{Binding ElementName=RecorderLightWindow, Path=Foreground}"

UseLayoutRounding="True" MaxSize="16" ContentHeight="18" ContentWidth="18" TabIndex="8"

MinWidth="{Binding RelativeSource={RelativeSource Mode=Self}, Path=ActualHeight}"

KeyGesture="{Binding Converter={StaticResource ShortcutKeys}, ConverterParameter='3'}"/>

<!--ToolTip="{Binding Source={x:Static properties:Settings.Default}, Path=StartPauseKey, Converter={StaticResource KeysToStringConverter}}" ToolTipService.Placement="Bottom"-->

<n:ImageButton x:Name="RecordPauseButton" UseLayoutRounding="True" MaxSize="16" ContentHeight="18" ContentWidth="18" TabIndex="9"

Text="{Binding Stage, ElementName=RecorderLightWindow, Converter={StaticResource StageToButtonStringConverter}, FallbackValue={StaticResource Recorder.Record}}"

Content="{Binding Stage, ElementName=RecorderLightWindow, Converter={StaticResource StageToCanvasConverter}, FallbackValue={StaticResource Vector.Record}}"

Click="RecordPauseButton_Click" Style="{StaticResource Style.Button.Horizontal}"

Foreground="{Binding ElementName=RecorderLightWindow, Path=Foreground}"

MinWidth="{Binding RelativeSource={RelativeSource Mode=Self}, Path=ActualHeight}"

KeyGesture="{Binding Converter={StaticResource ShortcutKeys}, ConverterParameter='1'}">

<n:ImageButton.ContextMenu>

<ContextMenu>

<n:ImageMenuItem Header="{DynamicResource Recorder.RecordingOptions}" IsHitTestVisible="False" Image="{StaticResource Vector.Record}" MaxSize="16"/>

<Separator/>

<n:ImageMenuItem Header="{DynamicResource Recorder.Snapshot}" IsCheckable="True" Image="{StaticResource Vector.Camera.Add}" MaxSize="16"

IsChecked="{Binding SnapshotMode, Source={x:Static u:UserSettings.All}, Mode=TwoWay}" Command="u:Commands.EnableSnapshot"/>

<n:ImageMenuItem x:Name="ThinModeMenuItem" Header="{DynamicResource Recorder.ThinMode}" IsCheckable="True" Image="{StaticResource Vector.Application}" MaxSize="16"

IsChecked="{Binding RecorderThinMode, Source={x:Static u:UserSettings.All}, Mode=TwoWay}" Command="u:Commands.EnableThinMode"

Visibility="{Binding FullScreenMode, Source={x:Static u:UserSettings.All}, Converter={StaticResource InvertedBoolToVisibility}}"/>

<n:ImageMenuItem Header="{DynamicResource Recorder.Fullscreen}" IsCheckable="True" Image="{StaticResource Vector.WidthHeight}" MaxSize="16"

IsChecked="{Binding FullScreenMode, Source={x:Static u:UserSettings.All}, Mode=TwoWay}" Command="u:Commands.EnableFullScreen"/>

</ContextMenu>

</n:ImageButton.ContextMenu>

</n:ImageButton>

<n:ImageButton x:Name="StopButton" Text="{DynamicResource Recorder.Stop}" Content="{StaticResource Vector.Stop}"

Click="StopButton_Click" Style="{StaticResource Style.Button.Horizontal}"

Foreground="{Binding ElementName=RecorderLightWindow, Path=Foreground}"

UseLayoutRounding="True" MaxSize="16" ContentHeight="18" ContentWidth="18" Margin="0" TabIndex="10"

MinWidth="{Binding RelativeSource={RelativeSource Mode=Self}, Path=ActualHeight}"

KeyGesture="{Binding Converter={StaticResource ShortcutKeys}, ConverterParameter='2'}"/>

</StackPanel>

</Grid>

</Grid>

</n:LightWindow>

问题7：如果这个软件让你实现，你会怎么做？

启动界面，是4个选项，录制桌面、录制摄像头、录制绘图、视频帧编辑器

录制桌面、录制摄像头、录制绘图其实是一样的东西。

无非是设置一个定时器，定时的采集图像放到硬盘中。这部分的代码在呢?

C:\Users\laiqun\AppData\Local\Temp\   C:\Users\laiqun\AppData\Local\Temp\ScreenToGif\Recording\2018-02-03 14-18-53

<n:ImageButton x:Name="RecordPauseButton" UseLayoutRounding="True" MaxSize="16" ContentHeight="18" ContentWidth="18" TabIndex="9"

Text="{Binding Stage, ElementName=RecorderLightWindow, Converter={StaticResource StageToButtonStringConverter}, FallbackValue={StaticResource Recorder.Record}}"

Content="{Binding Stage, ElementName=RecorderLightWindow, Converter={StaticResource StageToCanvasConverter}, FallbackValue={StaticResource Vector.Record}}"

Click="RecordPauseButton_Click" Style="{StaticResource Style.Button.Horizontal}"

Foreground="{Binding ElementName=RecorderLightWindow, Path=Foreground}"

MinWidth="{Binding RelativeSource={RelativeSource Mode=Self}, Path=ActualHeight}"

录制按钮点击

private void RecordPauseButton_Click(object sender, RoutedEventArgs e)

{

if (!UserSettings.All.SnapshotMode)

RecordPause();

else

Snap();

}

RecordPause函数的实现：

private async void RecordPause()

{

switch (Stage)  //Stage在哪儿改变？

{

case Stage.Stopped:  //一开始肯定是从stopped 状态开始的，启动录制后，这里会将stopped状态改变为recording，表示正在录制。

录制其实在启动一个定时器，做各种记录性的操作。

从UnregisterEvents这个函数可以看出蛛丝马迹

private void UnregisterEvents()

{

_capture.Tick -= Normal_Elapsed;

_capture.Tick -= NormalAsync_Elapsed;

_capture.Tick -= Cursor_Elapsed;

_capture.Tick -= CursorAsync_Elapsed;

_capture.Tick -= FullCursor_Elapsed;

_capture.Tick -= Full_Elapsed;

}

private void Normal_Elapsed(object sender, EventArgs e)

{

//Actual position on the screen.  获取要录制的区域

var lefttop = Dispatcher.Invoke(() =>

{

var left = Math.Round((Math.Round(Left, MidpointRounding.AwayFromZero) + Constants.LeftOffset) * _scale);

var top = Math.Round((Math.Round(Top, MidpointRounding.AwayFromZero) + Constants.TopOffset) * _scale);

return new Point((int)left, (int)top);

});

//Take a screenshot of the area.

var bt = Native.Capture(_size, lefttop.X, lefttop.Y);

if (bt == null || !IsLoaded)

return;

var fileName = $"{Project.FullPath}{FrameCount}.png";

//这里只是简单的更新一下图像文件信息，并没有实际创建图像文件

Project.Frames.Add(new FrameInfo(fileName, FrameRate.GetMilliseconds(_snapDelay), new List<SimpleKeyGesture>(_keyList)));

_keyList.Clear();

//AddFrames创建图像文件

ThreadPool.QueueUserWorkItem(delegate { AddFrames(fileName, new Bitmap(bt)); });//线程池

FrameCount++;

}

1.       System.Windows.Forms.Timer myTimer = new System.Windows.Forms.Timer();//实例化　

2.      myTimer.Tick += new EventHandler(函数名); //给timer挂起事件

3.      myTimer.Enabled = true；//使timer可用

4.       myTimer.Interval = n; //设置时间间隔，以毫秒为单位

5.       myTimer.Stop(); //如果要暂停计时则使用Stop()方法

6.       myTimer.Enabled = false;//若要停止使用timer，则使之不可用

设置项界面

是一个xml文件，用来读取和写入配置的。 程序的相关地方会读取这些配置，为了方便，最好把读取配置项的地方写在一起.这部分的代码在呢?UserSettings

namespace ScreenToGif.Util

{

internal sealed class UserSettings : INotifyPropertyChanged

{

#region Variables

private static ResourceDictionary _local;

private static ResourceDictionary _appData;

private static readonly ResourceDictionary Default;

public event PropertyChangedEventHandler PropertyChanged;

public static UserSettings All { get; } = new UserSettings();

视频帧编辑器负责把录制的一帧帧的图像载入，创建对应的缩略图。这部分的代码在呢?

我想在录制的时候顺势把鼠标和键盘录制进去，怎么实现？这部分的代码在呢?

Recorder构造函数

_actHook = new UserActivityHook(true, true); //true for the mouse, true for the keyboard.

_actHook.KeyDown += KeyHookTarget;

_actHook.OnMouseActivity += MouseHookTarget;