Custom Commands

- Register custom command events with the lcEventSetProc functions.
- When LiteCAD fires the LC_EVENT_ADDCMD event, create your custom commands objects with the lcCreateCommand function.
- Call your command with the lcWndExeCommand function.
- During the command execution, LiteCAD will fire LC_EVENT_CCMD events
- In order to finish the command, call lcCmdExit function from event procedure.

Events generated during a command execution:

Event type	Meaning
LC_EVENT_ADDCMD	LiteCAD initializes commands. Use this event to add custom commands.
LC_EVENT_CCMD	Custom commands interface

Functions
The following functions can be used only inside of command event procedures.

Function	Meaning
lcCmdExit	Finishes active command
lcCmdCursorText	Command prompt near cursor
lcCmdMessage	Displays message box

Properties of a command object:

Property	Type	Access	Meaning
LC_PROP_CMD_ID	int	R	Command identifier (LC_CMD_CUSTOM + n)
LC_PROP_CMD_PARAM	int	R	parameter passed by lcWndExeCommand
LC_PROP_CMD_STEP	int	RW	Step of execution
LC_PROP_CMD_LCWND	handle	R	Handle to graphics window
LC_PROP_CMD_HWND	handle	R	Handle to a window (HWND)
LC_PROP_CMD_DRW	handle	R	Handle to a drawing
LC_PROP_CMD_BLOCK	handle	R	Handle to a block
LC_PROP_CMD_CURSORCROSS	bool	RW	Enable/disable crosshair cursor
LC_PROP_CMD_INT0 . . . LC_PROP_CMD_INT9	int	RW	Command-specific integer variables
LC_PROP_CMD_FLOAT0 . . . LC_PROP_CMD_FLOAT9	float	RW	Command-specific float variables
LC_PROP_CMD_HAND0 . . . LC_PROP_CMD_HAND9	handle	RW	Command-specific HANDLE variables
LC_PROP_CMD_STR	string	RW	Command-specific string variable (max 1023 symbols)

See also

Code sample