How does the ComboBox control in wpf change the style when the mouse is pressed / touchscreen clicked?

topic description

I want to change the style of the ComboBox control in the wpf window when the mouse is pressed / touchscreen clicked, but after I wrote the following code, I found that the ComboBox control only shows the effect I want when it is "expanded-> folded". When "put away-> expanded", there is no style change when the mouse is pressed, which is a headache.

related codes
Combobox xaml wpf
Mar.31,2021

the method currently used is to derive a component on its own, instead of using MultiDataTrigger

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
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MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e442fb-44a8d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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