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Evas_Coord_Mapping_Group
Langue: en
Version: 379379 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
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.
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre