JulienN: color :D

2008-02-23T14:19:08Z

color :D

JulienN: How to use the EFL

2008-01-27T15:38:30Z

How to use the EFL

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== Installing required libs ==
- Using the menuconfig of buildroot (no usable for the moment)

== Init required libs ==
We will use evas and ecore,
we need to init both.
So we call <lib>_init() for both.

evas_init();
ecore_init();

You can handle error during init like any other fuctions.

== Set up where you will display things ==

On the APF you need to use the Framebuffer to displays graphics on the lcd
So you need a new Framebuffer object from Evas_ecore
ee = ecore_evas_fb_new(NULL, ANGLE, WIDTH, HEIGHT);
where ANGLE is the rotation in ° of the screen

If you are on your host Pc, with Xorg, you will need a X11_software to display things.

ee = ecore_evas_software_x11_new(NULL, 0, 0, 0, WIDTH, HEIGHT);

Then you can show it on the screen

ecore_evas_show(ee);

== Get the Evas Object ==
And now, we get an evas object, we will manipulate it after.
evas = ecore_evas_get(ee);

== Displaying things ==

Let's add a rectangle to the evas object.
base_rect_sec = evas_object_rectangle_add(evas);

Then we will set the size of the rectangle
evas_object_resize(base_rect_sec, WIDTH-200, HEIGHT);

And now, we set the color of the rectangle. (R,G,B,Alpha)
evas_object_color_set(base_rect_sec, 0, 0, 255, 25);

We show the rectangle
evas_object_show(base_rect_sec);

== Compiling ==

To test on your host computer you will compile it with :

gcc -o test test.c -levas -lecore -lecore_evas

And then
./test

For the APF board

-mtune=arm920t -msoft-float

Use the gcc version of buildroot, and -L to the /usr/lib in the root dir, and -I to /usr/include too.
Sometime you will nee to do that for the staging_dir too.

And you will need to link to the framebuffer engine too
-lecore_fb

And eet too if this had not be done automaticaly.
-leet

@@ Line 8: / Line 8: @@
 we need to init both.
 So we call <lib>_init() for both.
+<source lang=c>
-  evas_init();
+evas_init();
-  ecore_init();
+ecore_init();
+</source>
 You can handle error during init like any other fuctions.
@@ Line 18: / Line 18: @@
 On the APF you need to use the Framebuffer to displays graphics on the lcd
 So you need a new Framebuffer object from Evas_ecore
-  ee = ecore_evas_fb_new(NULL, ANGLE, WIDTH, HEIGHT);
+<source lang=c>
 where ANGLE is the rotation in ° of the screen
 If you are on your host Pc, with Xorg, you will need a X11_software to display things.
+<source lang=c>
-  ee = ecore_evas_software_x11_new(NULL, 0, 0, 0, WIDTH, HEIGHT);
+ee = ecore_evas_software_x11_new(NULL, 0, 0, 0, WIDTH, HEIGHT);
+</source>
 Then you can show it on the screen
+<source lang=c>
-  ecore_evas_show(ee);
+ecore_evas_show(ee);
+</source>
 == Get the Evas Object ==
 And now, we get an evas object, we will manipulate it after.
-  evas = ecore_evas_get(ee);
+<source lang=c>
 evas = ecore_evas_get(ee);
 == Displaying things ==
 Let's add a rectangle to the evas object.
-  base_rect_sec = evas_object_rectangle_add(evas);
+<source lang=c>
 base_rect_sec = evas_object_rectangle_add(evas);
 Then we will set the size of the rectangle
-  evas_object_resize(base_rect_sec, WIDTH-200, HEIGHT);
+<source lang=c>
 evas_object_resize(base_rect_sec, WIDTH-200, HEIGHT);
 And now, we set the color of the rectangle. (R,G,B,Alpha)
-  evas_object_color_set(base_rect_sec, 0, 0, 255, 25);
+<source lang=c>
 evas_object_color_set(base_rect_sec, 0, 0, 255, 25);
 We show the rectangle
-  evas_object_show(base_rect_sec);
+<source lang=c>
 evas_object_show(base_rect_sec);
 == Compiling ==

CodingWithEFL - Revision history

JulienN: color :D

JulienN: How to use the EFL