(21) blender source code analysis: click the mouse to add the message to the queue

The front analysis flash screen window shows , From the loading of pictures to the layout display of menus , from C Code to python Code calls to each other , And then to the whole screen UI Layout display . Next, let's analyze the event processing flow of mouse press , Only in this way can we understand blender Handle Windows The process of news , You can understand its event handling process , Then you can further add event handling .

If you are familiar with Windows Programming , You will be familiar with the whole event processing , As shown in the figure below ：

This process has not changed for more than ten years , This is a Windows The message mechanism of , therefore blender stay Windows Run under , This process cannot be saved . This process is also briefly introduced in the previous article , Here we mainly focus on the message processing process , Now press the message with the left mouse button as an example .

When you are in blender After pressing the mouse on the interface , It will trigger windows Left mouse button press message ࿰