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read/howto/change-panel-layout.md

@@ -17,14 +17,164 @@ parent: 如何
 
 
 
+## 範例腳本
+
+> [範例腳本](https://github.com/samwhelp/note-about-mate/tree/gh-pages/_demo/sample/mate-panel)
+
+
+
+
+## Mate Panel Layouts
+
+| Mate Panel 內建的 Layout |
+| ------------------ |
+| [/usr/share/mate-panel/layouts](https://github.com/mate-desktop/mate-panel/tree/master/data) |
+
+
+| 我個人撰寫的 Mate Panel Layout |
+| ------------------ |
+| [/usr/share/mate-panel/layouts](https://github.com/samwhelp/note-about-mate/tree/gh-pages/_demo/sample/mate-panel/layouts/mate-panel-layouts/asset/overlay/usr/share/mate-panel/layouts) |
+
+執行
+
+``` sh
+ls /usr/share/mate-panel/layouts/*.layout | awk -F '/' '{printf $6"\n"}' | awk -F '.layout' '{printf $1"\n"}'
+```
+
+顯示
+
+```
+brisk-menu-stand-alone-bottom
+brisk-menu-stand-alone-top
+classic-menu-stand-alone-bottom
+classic-menu-stand-alone-top
+default
+fedora
+linuxmint
+mageia
+mate-menu-stand-alone-bottom
+mate-menu-stand-alone-top
+opensuse
+stand-alone-bottom
+stand-alone-top
+ubuntu
+```
+
+
+
+
 ## By dconf
 
+> 主要採用這個方式
+
+> [範例](https://github.com/samwhelp/note-about-mate/blob/gh-pages/_demo/sample/mate-panel/change-layout/prototype/by-dconf/prototype.sh)
+
+``` sh
+dconf reset -f /org/mate/panel/
 
+dconf write /org/mate/panel/general/default-layout "'default'"
+
+mate-panel --replace &
+```
 
 
 ## By mate-panel
 
+> [範例](https://github.com/samwhelp/note-about-mate/blob/gh-pages/_demo/sample/mate-panel/change-layout/prototype/by-mate-panel/prototype.sh)
+
+> 本來預期採用下面三行的流程，不過不是每次都會成功。
+
+``` sh
+mate-panel --reset
+
+mate-panel --layout 'default'
+
+mate-panel --replace &
+```
 
+> 於是改為下面三行的流程，就可以正常運行
+
+``` sh
+mate-panel --reset
+
+dconf write /org/mate/panel/general/default-layout "'default'"
+
+mate-panel --replace &
+```
 
 
 ## By mate-tweak
+
+> [範例](https://github.com/samwhelp/note-about-mate/blob/gh-pages/_demo/sample/mate-panel/change-layout/prototype/by-mate-tweak/prototype.sh)
+
+執行
+
+``` sh
+mate-tweak --get-layout
+```
+
+顯示
+
+```
+Window Manager is: marco
+System installed layouts:
+['fedora', 'default', 'opensuse']
+Current layout: default
+```
+
+
+執行
+
+``` sh
+mate-tweak --layout 'default'
+```
+
+顯示
+
+```
+Window Manager is: marco
+System installed layouts:
+['fedora', 'default', 'opensuse']
+Current layout: default
+Switching to: default
+```
+
+> 注意事項: 我在「Debian Bookworm」執行「`mate-tweak --layout 'default'`」，發現會出錯，提示訊息如下
+
+```
+Window Manager is: marco
+System installed layouts:
+['fedora', 'default', 'opensuse']
+Current layout: brisk-menu-stand-alone-bottom
+Switching to: default
+Traceback (most recent call last):
+  File "/usr/bin/mate-tweak", line 1737, in <module>
+    mt.replace_panel_layout(args.layout, True)
+  File "/usr/bin/mate-tweak", line 768, in replace_panel_layout
+    self.enable_applets()
+  File "/usr/bin/mate-tweak", line 571, in enable_applets
+    pid = subprocess.Popen(['mate-volume-control-applet'], stdout=DEVNULL, stderr=DEVNULL).pid
+          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  File "/usr/lib/python3.11/subprocess.py", line 1024, in __init__
+    self._execute_child(args, executable, preexec_fn, close_fds,
+  File "/usr/lib/python3.11/subprocess.py", line 1901, in _execute_child
+    raise child_exception_type(errno_num, err_msg, err_filename)
+FileNotFoundError: [Errno 2] No such file or directory: 'mate-volume-control-applet'
+```
+
+> 於是修改「`/usr/bin/mate-tweak`」這個檔案，
+
+> 找到其中一行「[pid = subprocess.Popen(['mate-volume-control-applet'], stdout=DEVNULL, stderr=DEVNULL).pid](https://github.com/ubuntu-mate/mate-tweak/blob/master/mate-tweak#L571)」
+
+> 將「`mate-volume-control-applet`」改成「`mate-volume-control-status-icon`」，就可以正常運作。
+
+
+
+
+## Debian Package
+
+| Debian Package |
+| -------------- |
+| [dconf-cli](https://packages.debian.org/stable/dconf-cli) |
+| [mate-panel](https://packages.debian.org/stable/mate-panel) |
+| [mate-tweak](https://packages.debian.org/stable/mate-tweak) |