Question

我有一个简单的树，它工作正常，但单击时不会突出显示，用户需要双击。

绑定到它的命令在单击时工作正常。

<TreeView ItemsSource="{Binding ElementsTypes}">
        <TreeView.ItemTemplate>
            <HierarchicalDataTemplate>
                <TextBlock Text="{Binding Name}">
                    <TextBlock.InputBindings>
                        <MouseBinding Gesture="LeftClick"
                                      Command="{Binding ElementsCommand}"
                                      CommandParameter="{Binding}" />
                    </TextBlock.InputBindings>
                </TextBlock>
            </HierarchicalDataTemplate>
        </TreeView.ItemTemplate>
</TreeView>

Answer 1

那是因为你的import numpy as np import matplotlib.pyplot as plt from matplotlib.widgets import Slider def update(val): mv = smean.val stdv = sstd.val n_sample = round(sn.val) nd = np.random.normal(loc=mv, scale=stdv, size=n_sample) #Redraw histogram ax.cla() ax.hist(nd, normed=True, bins=n_bins0, alpha=0.5) plt.draw() def reset(event): mv.reset() stdv.reset() n_sample.reset() ax = plt.subplot(111) plt.subplots_adjust(left=0.25, bottom=0.25) m0 = -2.5 std0 = 1 n0 = 1000 n_bins0 = 20 nd = np.random.normal(m0, std0, n0) plt.hist(nd, normed=True, bins=n_bins0, alpha=0.5) axcolor = 'lightgray' axmean = plt.axes([0.25, 0.01, 0.65, 0.03], axisbg=axcolor) axstd = plt.axes([0.25, 0.06, 0.65, 0.03], axisbg=axcolor) axssize = plt.axes([0.25, 0.11, 0.65, 0.03], axisbg=axcolor) smean = Slider(axmean, 'Mean', -5, 5, valinit=m0) sstd = Slider(axstd, 'Std', 0.1, 10.0, valinit=std0) sn = Slider(axssize, 'n_sample', 10, 10000, valinit=n0) smean.on_changed(update) sstd.on_changed(update) sn.on_changed(update) plt.show()“偷”了你的左键。一种可能的解决方案是将MouseBinding属性添加到您的ViewModel并在IsSelected上将其设置为true：

ElementsCommand

通过这种方式，您还可以知道ViewModel中的哪个项目已被选中，并且能够以编程方式从ViewModel中操作选择。

单击WPF时，TreeViewItem不会突出显示

1 个答案: