即使在C＃中的嵌套面板控件上也看不到MouseWheel
[英]Can't see MouseWheel even on nested Panel control in C#
问题描述
I have a Panel on a TabPage on a TabControl that is on a form. 
我在窗体上的TabControl的TabPage上有一个面板。
I have a Mouse Event function "control_MouseWheel". 我有一个鼠标事件函数“ control_MouseWheel”。
If I bind that function to the MouseWheel event of just the panel, nothing happens when I scroll the mousewheel. 如果我将该函数绑定到仅面板的MouseWheel事件，则在滚动鼠标滚轮时不会发生任何事情。
If I bind that function to the MouseWheel event of both the panel and the TabPage or all three of the Panel, the TabPage and the TabControl, nothing happens. 如果我将该函数绑定到面板和TabPage或所有三个面板，TabPage和TabControl的MouseWheel事件，则不会发生任何事情。
If I then bind that function to the MouseWheel event of the form, the mouse event handler fires, but only on the form. 如果然后将该函数绑定到窗体的MouseWheel事件，则将触发鼠标事件处理程序，但仅在窗体上触发。 I can see this via the use of ConsoleWriteline(). 我可以通过使用ConsoleWriteline（）看到这一点。
How do I get it to fire for the underlying panel that I actually want to use the mouse wheel event? 如何使其触发我实际上要使用鼠标滚轮事件的基础面板？
Am I missing a property setting for the stack of child controls? 我是否缺少子控件堆栈的属性设置？
1 个解决方案
解决方案1
2 2009-09-25 01:57:15
The MouseWheel event is sent to the control that has focus. MouseWheel事件发送到具有焦点的控件。
Since panels cannot have focus, they will never get MouseWheel events. 由于面板无法获得焦点，因此它们将永远不会获得MouseWheel事件。
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