删除软键盘Adwaita主题Centos上的按钮阴影

Question

我在CentOS 7上运行Adwaita主题，并从Ubuntu迁移。我试图通过覆盖引擎pixmap来删除main.rc中的软键盘时按下的按钮阴影。当按下按钮时，它从正常状态转换为活动状态。阴影仍然存在。

main.rc：

style "button" {

  xthickness = 2
  ythickness = 2

  # For the sake of sanity style buttons this way
  engine "pixmap" {

    ###########
    # Buttons #
    ###########

    image {
      function = SHADOW
    }

    image {
      function = BOX
      state    = NORMAL
      file     = "assets/button.png"
      border   = {4, 4, 4, 4}
      stretch  = TRUE
    }

    image {
      function = BOX
      state    = PRELIGHT
      shadow   = OUT
      file     = "assets/button-hover.png"
      border   = {4, 4, 4, 4}
      stretch  = TRUE
    }

    # Don't add hover effect on pressed buttons
    image {
      function = BOX
      state    = PRELIGHT
      shadow   = IN
      file     = "assets/button-active.png"
      border   = {4, 4, 4, 4}
      stretch  = TRUE
    }

    image {
      function = BOX
      state    = ACTIVE
      file     = "assets/button-active.png"
      border   = {4, 4, 4, 4}
      stretch  = TRUE
    }

    image {
      function = BOX
      state    = INSENSITIVE
      file     = "assets/button-insensitive.png"
      border   = {4, 4, 4, 4}
      stretch  = TRUE
    }
  }
}