VPF::Scrollviewer blocking events - Форум программистов

fakefreak

Дата 30.6.2012, 10:18 (ссылка)

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Новичок

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Код


internal class myRTB : System.Windows.Controls.RichTextBox{
    internal bool editable = false;

    public myRTB(){
        this.MouseDown += new System.Windows.Input.MouseButtonEventHandler(myRTB_MouseDown);
    }
    void myRTB_MouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e){
        int tmp333 = 333;
    }
    protected override void OnMouseLeftButtonDown(System.Windows.Input.MouseButtonEventArgs e){
        int tmp333 = 333;
    }
    protected override void OnMouseMove(System.Windows.Input.MouseEventArgs e){
        int tmp333 = 333;
    }
    protected override void OnMouseDoubleClick(System.Windows.Input.MouseButtonEventArgs e){
        int tmp333 = 333;
    }
    protected override void OnMouseDown(System.Windows.Input.MouseButtonEventArgs e){
        int tmp333 = 333;
    }
    protected override void OnPreviewMouseDown(System.Windows.Input.MouseButtonEventArgs e){
        int tmp333 = 333;
    }
}
//выставляю точки останова на событиях

--------------------------------------------------------------

Код


//если сделать так, то ни одно из событий от мыши никогда ни в каком случае не проходит:
internal System.Windows.Controls.ScrollViewer scroll;
internal myRTB innerTextBox;
scroll = (System.Windows.Controls.ScrollViewer)System.Windows.Markup.XamlReader.Load(stream);
host.Child = scroll;
scroll.Content = innerTextBox;

--------------------------------------------------------------

Код


//если же сделать так, то всё ок:
internal System.Windows.Controls.ScrollViewer scroll;
internal myRTB innerTextBox;
host.Child = innerTextBox;

--------------------------------------------------------------
т.е. ScrollViewer гасит все события, и они не доходят до контента. что делать? почему так?

fakefreak

Дата 1.7.2012, 18:16 (ссылка)

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Новичок

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Обнаружил такую штуку:
если инициализировать ScrollViewer не через xaml код

Код


scroll = (System.Windows.Controls.ScrollViewer)System.Windows.Markup.XamlReader.Load(stream);

, а инициализировать его конструктором по умолчанию

Код


scroll = new System.Windows.Controls.ScrollViewer();

то события от мыши к контенту ScrollViewer'а проходят хорошо.
Xaml код у меня такой:

Код


<ScrollViewer x:Class="DeskNotes.myScrollViewer" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:theme="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero" xmlns:c="clr-namespace:DeskNotes" x:ClassModifier="public" MouseDown="ScrollViewer_MouseDown" MouseUp="ScrollViewer_MouseUp" MouseMove="ScrollViewer_MouseMove">
            <ScrollViewer.Resources>
        <Style x:Key="{x:Type myScrollViewer}" TargetType="{x:Type myScrollViewer}">
            <Setter Property="HorizontalScrollBarVisibility" Value="Hidden"/>
            <Setter Property="VerticalScrollBarVisibility" Value="Hidden"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type myScrollViewer}">
                        <Grid>
                            <Grid Background="{TemplateBinding Background}">
                                <ScrollContentPresenter 
                                    x:Name="PART_ScrollContentPresenter"
                                    Width="{TemplateBinding ActualWidth}"
                                    Margin="{TemplateBinding Padding}"
                                    Content="{TemplateBinding Content}"
                                    ContentTemplate="{TemplateBinding ContentTemplate}"
                                    CanContentScroll="{TemplateBinding CanContentScroll}"/>
                            </Grid>
                            <Grid Background="Transparent">
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="*"/>
                                    <ColumnDefinition Width="Auto"/>
                                </Grid.ColumnDefinitions>
                                <ScrollBar 
                                    x:Name="PART_VerticalScrollBar"
                                    Grid.Column="1"
                                    Minimum="0.0"
                                    Maximum="{TemplateBinding ScrollableHeight}"
                                    ViewportSize="{TemplateBinding ViewportHeight}"
                                    Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=VerticalOffset, Mode=OneWay}"
                                    Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}"         
                                    Cursor="Arrow"
                                    AutomationProperties.AutomationId="VerticalScrollBar"/>
                            </Grid>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
            <Style.Triggers>
                <Trigger Property="IsEnabled" Value="false">
                    <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                </Trigger>
                <Trigger Property="IsMouseOver" Value="true">
                    <Setter Property="VerticalScrollBarVisibility" Value="Visible"/>
                </Trigger>
            </Style.Triggers>
        </Style>
        <Style x:Key="ScrollBarButton" TargetType="{x:Type RepeatButton}">
            <Setter Property="OverridesDefaultStyle" Value="true"/>
            <Setter Property="Focusable" Value="false"/>
            <Setter Property="IsTabStop" Value="false"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type RepeatButton}">
                        <Path x:Name="Arrow" HorizontalAlignment="Center" VerticalAlignment="Center" Fill="{TemplateBinding Background}"/>
                        <ControlTemplate.Triggers>
                            <Trigger Property="theme:ScrollChrome.ScrollGlyph" Value="UpArrow">
                                <Setter TargetName="Arrow" Property="Data" Value="M 3,0 l 3,8 l -6,0 Z"/>
                            </Trigger>
                            <Trigger Property="theme:ScrollChrome.ScrollGlyph" Value="DownArrow">
                                <Setter TargetName="Arrow" Property="Data" Value="M 0,0 l 6,0 l -3,8 Z"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <Style x:Key="ScrollBarThumb" TargetType="{x:Type Thumb}">
            <Setter Property="OverridesDefaultStyle" Value="true"/>
            <Setter Property="IsTabStop" Value="false"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type Thumb}">
                        <Border Background="#FF777777" CornerRadius="2"/>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <Style x:Key="VerticalScrollBarPageButton" TargetType="{x:Type RepeatButton}">
            <Setter Property="OverridesDefaultStyle" Value="true"/>
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="Focusable" Value="false"/>
            <Setter Property="IsTabStop" Value="false"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type RepeatButton}">
                        <Rectangle Fill="{TemplateBinding Background}" Width="{TemplateBinding Width}" Height="{TemplateBinding Height}"/>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <Style x:Key="{x:Type ScrollBar}" TargetType="{x:Type ScrollBar}">
            <Setter Property="Background" Value="#FF979797"/>
            <Setter Property="Stylus.IsPressAndHoldEnabled" Value="false"/>
            <Setter Property="Stylus.IsFlicksEnabled" Value="false"/>
            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
            <Setter Property="Width" Value="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"/>
            <Setter Property="MinWidth" Value="{DynamicResource {x:Static SystemParameters.VerticalScrollBarWidthKey}}"/>
            <Setter Property="Margin" Value="2"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ScrollBar}">
                        <Border 
                            x:Name="Bg"
                            CornerRadius="2"                         
                            Margin="2"
                            Opacity="0.75"
                            Background="{TemplateBinding Background}"
                            VerticalAlignment="Bottom">
                            <Grid SnapsToDevicePixels="true">
                                <Grid.RowDefinitions>                                    
                                    <RowDefinition MaxHeight="{DynamicResource {x:Static SystemParameters.VerticalScrollBarButtonHeightKey}}"/>
                                    <RowDefinition MaxHeight="{DynamicResource {x:Static SystemParameters.VerticalScrollBarButtonHeightKey}}"/>
                                </Grid.RowDefinitions>
                                <RepeatButton
                                    Style="{StaticResource ScrollBarButton}"
                                    Background="#FFCBCBCB"                                    
                                    IsEnabled="{TemplateBinding IsMouseOver}"
                                    Command="{x:Static ScrollBar.LineUpCommand}"
                                    theme:ScrollChrome.ScrollGlyph="UpArrow"
                                    Margin="0,4"/>
                                <RepeatButton                   
                                    Style="{StaticResource ScrollBarButton}"
                                    Background="#FFCBCBCB"
                                    Grid.Row="1"
                                    IsEnabled="{TemplateBinding IsMouseOver}"
                                    Command="{x:Static ScrollBar.LineDownCommand}"
                                    theme:ScrollChrome.ScrollGlyph="DownArrow"
                                    Margin="0,4">
                                </RepeatButton>
                            </Grid>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsEnabled" Value="false">
                                <Setter TargetName="Bg" Property="Visibility" Value="Hidden"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
            <Style.Triggers>
                <MultiTrigger>
                    <MultiTrigger.Conditions>
                        <Condition Property="IsMouseOver" Value="True"/>
                        <Condition Property="Orientation" Value="Vertical"/>
                    </MultiTrigger.Conditions>
                    <MultiTrigger.Setters>
                        <Setter Property="Width" Value="30"/>
                        <Setter Property="Template">
                            <Setter.Value>
                                <ControlTemplate TargetType="{x:Type ScrollBar}">
                                    <Border 
                                        CornerRadius="4"                         
                                        Margin="2"
                                        Opacity="0.75"
                                        Background="{TemplateBinding Background}">
                                        <Grid SnapsToDevicePixels="true">
                                            <Grid.RowDefinitions>
                                                <RowDefinition Height="0.00001*"/>
                                                <RowDefinition MaxHeight="{DynamicResource {x:Static SystemParameters.VerticalScrollBarButtonHeightKey}}"/>
                                                <RowDefinition MaxHeight="{DynamicResource {x:Static SystemParameters.VerticalScrollBarButtonHeightKey}}"/>
                                            </Grid.RowDefinitions>
                                            <Track Name="PART_Track" IsEnabled="{TemplateBinding IsMouseOver}" IsDirectionReversed="true">
                                                <Track.DecreaseRepeatButton>
                                                    <RepeatButton Style="{StaticResource VerticalScrollBarPageButton}" Command="{x:Static ScrollBar.PageUpCommand}"/>
                                                </Track.DecreaseRepeatButton>
                                                <Track.IncreaseRepeatButton>
                                                    <RepeatButton Style="{StaticResource VerticalScrollBarPageButton}" Command="{x:Static ScrollBar.PageDownCommand}"/>
                                                </Track.IncreaseRepeatButton>
                                                <Track.Thumb>
                                                    <Thumb Style="{StaticResource ScrollBarThumb}" theme:ScrollChrome.ScrollGlyph="VerticalGripper" Margin="2"/>
                                                </Track.Thumb>
                                            </Track>
                                            <RepeatButton
                                                Style="{StaticResource ScrollBarButton}"
                                                Background="#FFFFFFFF"
                                                Grid.Row="1"
                                                IsEnabled="{TemplateBinding IsMouseOver}"
                                                Command="{x:Static ScrollBar.LineUpCommand}"
                                                theme:ScrollChrome.ScrollGlyph="UpArrow"
                                                RenderTransformOrigin="0.5, 0.5">
                                                <RepeatButton.RenderTransform>
                                                    <ScaleTransform ScaleX="1.5" ScaleY="1.5"/>
                                                </RepeatButton.RenderTransform>
                                            </RepeatButton>
                                            <RepeatButton                           
                                                Style="{StaticResource ScrollBarButton}"
                                                Background="#FFFFFFFF"
                                                Grid.Row="2"
                                                IsEnabled="{TemplateBinding IsMouseOver}"
                                                Command="{x:Static ScrollBar.LineDownCommand}"
                                                theme:ScrollChrome.ScrollGlyph="DownArrow"
                                                RenderTransformOrigin="0.5, 0.5">
                                                <RepeatButton.RenderTransform>
                                                    <ScaleTransform ScaleX="1.5" ScaleY="1.5"/>
                                                </RepeatButton.RenderTransform>
                                            </RepeatButton>
                                        </Grid>
                                    </Border>
                                </ControlTemplate>
                            </Setter.Value>
                        </Setter>
                    </MultiTrigger.Setters>
                </MultiTrigger>
            </Style.Triggers>
        </Style>
            </ScrollViewer.Resources>   
        </ScrollViewer>

Соответственно, делаю вывод, что не пропускает события мыши к контенту именно ScrollContentPresenter.
Видимо не пропускает из-за того, что контент ScrollContentPresenter'а забинден к контенту ScrollViewer'а.
Что сделать, чтобы до контента всё-таки доходили события мыши?

RastaDja

Дата 2.7.2012, 12:01 (ссылка)

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Код


private void ScrollViewer_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
        e.Handled = true;
}

Оно?

--------------------

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