SurfaceListbox锁定项目 [英] SurfaceListbox Lock on items

问题描述

 我有一个SurfaceListbox 并且项目是水平显示但是当我滚动 通过他们，我希望它不应该在两者之间停止，但总是 锁定 其中一项。非常感谢任何指针

 

谢谢

Jason

解决方案

嗨Jason，

 

for我使用了SurfaceScrollViewer，我没有看到使用SurfaceListBox的任何优势，因为我不需要选择的东西。

 

 < s：SurfaceItemsControl Name =" MySurfaceItemsControl" MinWidth = QUOT; 1024"了minHeight = QUOT; 768" >

   &NBSP; &NBSP;  < s：SurfaceItemsControl.ItemTemplate>

   &NBSP; &NBSP; &NBSP; &NBSP;  < DataTemplate>

   &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;  < Canvas Width =" 1024"高度="768">

   &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;  < Image Source =" {Binding}"宽度= QUOT; 800"高度="600"/>

   &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;  < / Canvas>

   &NBSP; &NBSP; &NBSP; &NBSP;  < / DataTemplate>

   &NBSP; &NBSP;  < / s：SurfaceItemsControl.ItemTemplate>

   &NBSP; &NBSP;  < s：SurfaceItemsControl.ItemsPanel>

   &NBSP; &NBSP; &NBSP; &NBSP;  < ItemsPanelTemplate>

   &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;  < StackPanel Orientation =" Horizo​​ntal">

   &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;  < / StackPanel>

   &NBSP; &NBSP; &NBSP; &NBSP;  < / ItemsPanelTemplate>

   &NBSP; &NBSP;  < / s：SurfaceItemsControl.ItemsPanel>

   &NBSP; &NBSP;  < s：SurfaceItemsControl.Template>

   &NBSP; &NBSP; &NBSP; &NBSP;  < ControlTemplate>

   &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;  < s：SurfaceScrollViewer VerticalScrollBarVisibility ="已禁用  

   &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; PreviewContactUp =" MySurfaceItemsControl_ContactUp" 

   &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; ScrollBar.Scroll =" MySurfaceListBox_Scroll">

   &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;  < ItemsPresenter />

   &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;  < / s：SurfaceScrollViewer>

   &NBSP; &NBSP; &NBSP; &NBSP;  < / ControlTemplate>

   &NBSP; &NBSP;  < / s：SurfaceItemsControl.Template>

    < / s：SurfaceItemsControl>

 

 

稍后，在ContactUp事件：

 

  private void MySurfaceItemsControl_ContactUp（object sender，ContactEventArgs e）

&NBSP;&NBSP; &NBSP; &NBSP;如果（e.OriginalSource是SurfaceThumb）

< span style ="white-space：pre"> return;

 

   &NBSP; &NBSP; &NBSP; &NBSP;   if（e.OriginalSource是SurfaceRepeatButton）

   &NBSP; &NBSP; &NBSP; &NBSP;   {

   &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;   SurfaceScrollViewer theScrollViewer = UIHelper.FindVisualChildren< SurfaceScrollViewer>（this）.First（）;

   &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;   GotoSlide（（int）Math.Round（theScrollViewer.Horizo​​ntalOffset / 1024））;

   &NBSP; &NBSP; &NBSP; &NBSP;  }

 

   &NBSP; &NBSP; &NBSP; &NBSP;   else

   &NBSP; &NBSP; &NBSP; &NBSP;   {

   &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;   GotoSlide（-1）;

   &NBSP; &NBSP; &NBSP; &NBSP;  }

   &NBSP; &NBSP;  }

 

 

GotoSlide方法进行计算并使用  theScrollViewer .ScrollToHorizo​​ntalOffset（）平移到相应的幻灯片。

 

 I have a SurfaceListbox  and the items are displayed horizontally But when I scroll  through them , I would like that it should stop not in between but always  lock in  one of the items .Any pointers would be greatly appreciated

 

Thanks

Jason

解决方案

Hi Jason,

 

for that I have used a SurfaceScrollViewer, I didn't see any advantage in using the SurfaceListBox because I didnt need the selection stuff.

 

 <s:SurfaceItemsControl Name="MySurfaceItemsControl" MinWidth="1024" MinHeight="768" >

        <s:SurfaceItemsControl.ItemTemplate>

            <DataTemplate>

                <Canvas Width="1024" Height="768">

                        <Image Source="{Binding}" Width="800" Height="600"/>

                </Canvas>

            </DataTemplate>

        </s:SurfaceItemsControl.ItemTemplate>

        <s:SurfaceItemsControl.ItemsPanel>

            <ItemsPanelTemplate>

                <StackPanel Orientation="Horizontal">

                </StackPanel>

            </ItemsPanelTemplate>

        </s:SurfaceItemsControl.ItemsPanel>

        <s:SurfaceItemsControl.Template>

            <ControlTemplate>

                <s:SurfaceScrollViewer VerticalScrollBarVisibility="Disabled" 

                                       PreviewContactUp="MySurfaceItemsControl_ContactUp" 

                                       ScrollBar.Scroll="MySurfaceListBox_Scroll">

                    <ItemsPresenter/>

                </s:SurfaceScrollViewer>

            </ControlTemplate>

        </s:SurfaceItemsControl.Template>

    </s:SurfaceItemsControl>

 

 

Later, in the ContactUp event:

 

 private void MySurfaceItemsControl_ContactUp(object sender, ContactEventArgs e)

        {

if (e.OriginalSource is SurfaceThumb)

return;

 

            if (e.OriginalSource is SurfaceRepeatButton)

            {

                SurfaceScrollViewer theScrollViewer = UIHelper.FindVisualChildren<SurfaceScrollViewer>(this).First();

                GotoSlide((int)Math.Round(theScrollViewer.HorizontalOffset / 1024));

            }

 

            else

            {

                GotoSlide(-1);

            }

        }

 

 

The GotoSlide method makes its calculations and uses theScrollViewer.ScrollToHorizontalOffset() to pan to the appropriate slide.

 

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