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Evas_Coord_Mapping_Group

NAME

Coordinate Mapping Functions -

Functions that are used to map coordinates from the canvas to the screen or the screen to the canvas.

Functions

EAPI Evas_Coord evas_coord_screen_x_to_world (const Evas *e, int x)
Convert/scale an ouput screen co-ordinate into canvas co-ordinates.
EAPI Evas_Coord evas_coord_screen_y_to_world (const Evas *e, int y)
Convert/scale an ouput screen co-ordinate into canvas co-ordinates.
EAPI int evas_coord_world_x_to_screen (const Evas *e, Evas_Coord x)
Convert/scale a canvas co-ordinate into output screen co-ordinates.
EAPI int evas_coord_world_y_to_screen (const Evas *e, Evas_Coord y)
Convert/scale a canvas co-ordinate into output screen co-ordinates.

Detailed Description

Functions that are used to map coordinates from the canvas to the screen or the screen to the canvas.

Function Documentation

EAPI Evas_Coord evas_coord_screen_x_to_world (const Evas * e, int x)

Convert/scale an ouput screen co-ordinate into canvas co-ordinates. Parameters:

e The pointer to the Evas Canvas
x The screen/output x co-ordinate

Returns:

The screen co-ordinate translated to canvas unit co-ordinates

This function takes in a horizontal co-ordinate as the x parameter and converts it into canvas units, accounting for output size, viewport size and location, returning it as the function return value. If e is invalid, the results are undefined.

Example:

  extern Evas *evas;
  extern int screen_x;
  Evas_Coord canvas_x;
 
  canvas_x = evas_coord_screen_x_to_world(evas, screen_x);
 
 

 

EAPI Evas_Coord evas_coord_screen_y_to_world (const Evas * e, int y)

Convert/scale an ouput screen co-ordinate into canvas co-ordinates. Parameters:

e The pointer to the Evas Canvas
y The screen/output y co-ordinate

Returns:

The screen co-ordinate translated to canvas unit co-ordinates

This function takes in a vertical co-ordinate as the y parameter and converts it into canvas units, accounting for output size, viewport size and location, returning it as the function return value. If e is invalid, the results are undefined.

Example:

  extern Evas *evas;
  extern int screen_y;
  Evas_Coord canvas_y;
 
  canvas_y = evas_coord_screen_y_to_world(evas, screen_y);
 
 

 

EAPI int evas_coord_world_x_to_screen (const Evas * e, Evas_Coord x)

Convert/scale a canvas co-ordinate into output screen co-ordinates. Parameters:

e The pointer to the Evas Canvas
x The canvas x co-ordinate

Returns:

The output/screen co-ordinate translated to output co-ordinates

This function takes in a horizontal co-ordinate as the x parameter and converts it into output units, accounting for output size, viewport size and location, returning it as the function return value. If e is invalid, the results are undefined.

Example:

  extern Evas *evas;
  int screen_x;
  extern Evas_Coord canvas_x;
 
  screen_x = evas_coord_world_x_to_screen(evas, canvas_x);
 
 

 

EAPI int evas_coord_world_y_to_screen (const Evas * e, Evas_Coord y)

Convert/scale a canvas co-ordinate into output screen co-ordinates. Parameters:

e The pointer to the Evas Canvas
y The canvas y co-ordinate

Returns:

The output/screen co-ordinate translated to output co-ordinates

This function takes in a vertical co-ordinate as the x parameter and converts it into output units, accounting for output size, viewport size and location, returning it as the function return value. If e is invalid, the results are undefined.

Example:

  extern Evas *evas;
  int screen_y;
  extern Evas_Coord canvas_y;
 
  screen_y = evas_coord_world_y_to_screen(evas, canvas_y);
 
 

 

Author

Generated automatically by Doxygen for Evas from the source code.