我有一个 Canvas ,它将包含从后面的代码生成的图像,我的 xaml 如下所示
<ScrollViewer HorizontalScrollBarVisibility="Visible" VerticalScrollBarVisibility="Visible" >
<WrapPanel >
<Grid ScrollViewer.HorizontalScrollBarVisibility="Visible" >
<Grid.RowDefinitions>
<RowDefinition Height="25" />
<RowDefinition Height="20" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="350"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Menu x:Name="menu1" Grid.Row="0" BorderBrush="AliceBlue" VerticalAlignment="Top" FontFamily="Comic Sans MS" DockPanel.Dock="Top" RenderTransformOrigin="0.48,3.04" >
<MenuItem Header="_File" Width="92" FontSize="16" FontWeight="Normal" FontFamily="Century Gothic" >
<MenuItem Header="_Print"/>
<MenuItem Header="_Print Preview"/>
<MenuItem Header="_Exit"/>
</MenuItem>
</Menu>
<ToolBar x:Name="toolBar1" Grid.Row="1" Grid.RowSpan="2" BorderBrush="Red" BorderThickness="3" Margin="0,0,0,900" Height="30" VerticalAlignment="Top" DockPanel.Dock="Top" >
<Button x:Name="Zoomin" Click="menuItemZoomin_Click" HorizontalAlignment="Left" Margin="1" Width="90" FontSize="16" FontWeight="SemiBold" Height="55" RenderTransformOrigin ="0.917,0.587" IsHitTestVisible="True" IsEnabled="True" FontFamily="Century Gothic" Content="Zoom In" />
<Button x:Name="Zoomout" Click="menuItemZoomout_Click" HorizontalAlignment="Left" Margin="1" Width="90" FontSize="16" FontWeight="SemiBold" RenderTransformOrigin="0.917,0.587" Height="55" FontFamily="Century Gothic" Content="Zoom Out"/>
<!--<Button x:Name="Print" Click="PrintBtn_Click" HorizontalAlignment="Left" Margin="1" Width="90" FontSize="16" FontWeight="SemiBold" RenderTransformOrigin="0.917,0.587" Height="55" FontFamily="Century Gothic" Content="Print"/>-->
</ToolBar>
<Canvas x:Name="cvsWarehouse" Grid.Row="1" Focusable="True" ScrollViewer.CanContentScroll="True" ScrollViewer.HorizontalScrollBarVisibility="Visible" ScrollViewer.VerticalScrollBarVisibility="Visible" MouseWheel="Canvas_MouseWheel" RenderTransformOrigin="0.5,0.5" Margin="15,144,122,151" Grid.ColumnSpan="2" >
<Canvas.LayoutTransform>
<TransformGroup>
<ScaleTransform x:Name ="st1" ScaleX="{Binding Value, ElementName=uiScaleSlider}"
ScaleY="{Binding Value, ElementName=uiScaleSlider}" />
<TranslateTransform Y="100" />
</TransformGroup>
</Canvas.LayoutTransform>
</Canvas>
</Grid>
</WrapPanel>
cvsWarehouse 是实际的 Canvas ,其中大量代码在生成图像时进行,输出窗口如下所示。
最大化时不显示滚动条。我疯狂地用谷歌搜索并尝试了一切,但仍然无法解决问题。我想滚动直到 Canvas 的末尾。下面还有更多图像,但包装板或布局转换在这里不起作用。这也有放大和缩小功能,但仍然不会显示滚动条。
如何使滚动条始终可见。例如放大或缩小或最小化或最大化
最佳答案
我遇到了类似的问题,我发现这个问题的第一个答案很有帮助 -( LayoutTransform on certain elements in canvas? )。将 ScrollViewer 应用到 Canvas (已应用布局变换的元素)。滚动查看器必须检测到 Canvas 大小的变化才能显示滚动条。另外,我认为您不需要在 Canvas 标签中使用这些 - ScrollViewer.CanContentScroll="True"ScrollViewer.HorizontalScrollBarVisibility="Visible"ScrollViewer.VerticalScrollBarVisibility="Visible"。 ScrollViewer 标签内的这些定义应该呈现所需的功能。
关于wpf - XAML Canvas 上可放大和缩小的滚动条,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36264972/