Difference between revisions of "Dev:State stroke"

Latest revision as of 07:37, 22 February 2010

Description

state_stroke is an 'invisible' mode - that is, you can't select it from the Toolbox. You see it on the Draw Tool and the Sketch Tool between mouse-down and mouse up, it's what's actually drawing to the canvas and taking your data.

NOTE: state_stroke does NOT handle mouse-down! This is to allow your tool to figure out if it needs to do anything different based on where the mouse is clicking, *before* state_stroke is entered!

Provides

EventStroke(stroke_data,width_data,modifier)

EventStroke is sent to the tool that calls state_stroke as soon as the state exits, along with the stroke data. Intercept this event to do something with the data.

Internals

Events Caught

• EVENT_STOP: event_stop_handler
• EVENT_REFRESH: event_refresh_handler
• EVENT_WORKAREA_MOUSE_BUTTON_UP: event_mouse_up_handler
• EVENT_WORKAREA_MOUSE_BUTTON_DRAG: event_mouse_draw_handler
• EVENT_REFRESH_TOOL_OPTIONS event_refresh_tool_options

StateStroke_Context

State constructor

~StateStroke_Context

State destructor

Restores the previous duck view, refreshes the toolbox, and raises EventStroke on the State Machine.

event_refresh_tool_options

Intercepts the event, and nothing further.

event_stop_handler

exits the state (pop-exception)

event_refresh_handler

Intercepts the event, and nothing further.

event_mouse_up_handler=

MouseUp Handler

If this is the LMB, set 'modifier' for the destructor event from the mouse event's data, then exit the state (pop-exception)

If this is for the RMB, intercept the signal and end.

If this is for any other mouse button, pass it along.

event_mouse_draw_handler

Mouse drag event handler

If this is the LMB, accept the event, add the event's position to stroke_data, and the event's pressure to width_data, and call queue_draw (?).

If it's the RMB, accept the event to keep the context menu from appearing.

Any other button, pass the event along.