QML dynamic status bar

[juliandoerner]

Reopening old Issue in relevant Repo
limetext/lime#486

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[zoli]

• Responding to view.set_status, view.get_status, view.erase_status
• Responding to status_message
• Showing tab size
• Showing the display syntax
• Showing the line and column

For view status we don't have any events or callbacks currently so it should be rendered in qml render loop or something like that.
For frontend status_message we can add a call in StatusMessage or like view status render it in a loop.
tab size and syntax are settings, we should add callback for them.
We should listen to OnSelectionModified event for line and column.

[zoli]

Ok now I added OnStatusChanged event and we should listen to that for rendering each view status messages. limetext/backend@24f823d

[zoli]

frontend status, syntax and tab size are implemented by 688d31c.

Will also add view status message and line col soon.

[ricochet1k]

Added comments to 688d31c.

Also, as a general implementation note, "pushing" data through Call("func", data) is not the best idea, because when the qml frontend restarts all that pushed data is lost. A better solution would be to have the status messages as a public Field in the window struct and call the qmlChanged() function on it instead.

[zoli]

I don't understand why should qml restart?

[ricochet1k]

Whenever you save a .qml file, there is code in the loop function that shuts down and restarts the frontend. It is extremely helpful when developing the .qml code.

[zoli]

Finishing this depends on limetext/backend#127.