2019-8-8-wpf - touch and mouse click response in non customer area

Default in WPF There are mouse events that do not respond to non client areas , But respond to touch events

Without afternoon tea ​ ​lsj​​ Tell me , In the project, in the non customer area of a customized window, you can't click a button with the mouse , But with touch, you can click the button . At first, Ben goldfish thought it was a problem repaired before , But as a goldfish, I don't remember how to fix it , In order to make this goldfish solve the problem of touch or mouse next time , So I wrote this blog

This article will tell you in WPF There are touch and mouse click responses for non customer areas

Before this article begins , We need to know the non customer area Non-client Area The concept of , In fact, it is the general meaning of the window title bar , Details please see ​ ​ Learn together WPF series （3）： forms - Robin Zhang   and ​ ​WPF Use WindowChrome, While customizing the window title bar, the original window style is retained to the greatest extent （ similar UWP/Chrome） - walterlv​​

On the blackboard , The following knowledge points need to be tested

default WPF The program supports responding in non client areas Touch touch , But does not respond to mouse clicks and Pointer touch

If you need to support mouse click in the non customer area, that is, the window title bar , Then please add additional attributes to the button WindowChrome.IsHitTestVisibleInChrome by true Support mouse click

      
      

       
       <Button WindowChrome.IsHitTestVisibleInChrome="True"/>
      
      
      
      

       
       
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there ​​WindowChrome.IsHitTestVisibleInChrome​​ Support inheritance , That is, you can set... In the window , In this way, all buttons in the window support clicking on the title bar

How to open Pointer Please see the news ​ ​win10 Support to raise the touch to the mouse event by default open Pointer news ​​

Me and ​ ​lsj​​ Use spy++ Know in WPF When you click on the title bar, you can receive Windows Mouse message , That is, here is WPF To deal with the

Me and ​ ​lsj​​​ Say maybe it was before WPF When the boss of the frame wrote it, he didn't know there was a touch , So the mouse event is handled . After adding the touch, I forgot to remove , So touch can use . Now? ​ ​lsj​​ Looking at WPF Source code , Want to find out how to make the title bar support touch but not mouse click

​ ​WindowChrome Class (System.Windows.Shell)​​

​ ​WindowChrome.IsHitTestVisibleInChrome Attached Property (Microsoft.Windows.Shell)​​

​ ​ About WM_NCHITTEST news - Gang.Wang  ​​

​ ​WM_TOUCH message - Windows applications​​