编写clutter的helloworld

      编译完clutter之后，需要写一个hello world。这里我参考了资料1，具体的流程如下：

      在源代码目录下创建目录myapp，同时创建文件example.c，加入如下代码：

#include 

#include 

// six empty rectangles and our stage

ClutterActor *stage = NULL;

ClutterActor *rect1 = NULL;

ClutterActor *rect2 = NULL;

ClutterActor *rect3 = NULL;

ClutterActor *rect4 = NULL;

ClutterActor *rect5 = NULL;

ClutterActor *rect6 = NULL;

// the create_rect() function needs to create actual rectangles rather than text boxes

ClutterActor *create_rect(ClutterColor col) {

  ClutterActor *rect = clutter_rectangle_new_with_color(&col);

  clutter_actor_set_size(rect, 256, 128);

  clutter_actor_set_position(rect, 256, 256);

  clutter_actor_set_anchor_point(rect, 128, 64);

  clutter_container_add_actor (CLUTTER_CONTAINER (stage), rect);

  clutter_actor_show (rect);

  return rect;

}

void move_rect(ClutterActor *rect) {

    clutter_actor_animate (rect,

            // CLUTTER_LINEAR,          // animate in linear

            CLUTTER_EASE_IN_OUT_BACK,   // animate like iphone

            500,

            "x", (float)(rand() % 512),

            "y", (float)(rand() % 512),

            "rotation-angle-z", (float)(rand() % 360),

            NULL);

}

// we'll be filling in this function later

void on_stage_button_press (ClutterStage *stage, ClutterEvent *event, gpointer data) {

    move_rect(rect1);

    move_rect(rect2);

    move_rect(rect3);

    move_rect(rect4);

    move_rect(rect5);

    move_rect(rect6);

}

int main(int argc, char *argv[]) {

    ClutterColor stage_color = { 0, 0, 0, 255 };

    ClutterColor red = { 255, 0, 0, 128 };

    ClutterColor green = { 0, 255, 0, 128 };

    ClutterColor blue = { 0, 0, 255, 128 };

    ClutterColor yellow = { 255, 255, 0, 128 };

    ClutterColor cyan = { 0, 255, 255, 128 };

    ClutterColor purple = { 255, 0, 255, 128 };

    clutter_init (&argc, &argv);

    stage = clutter_stage_get_default();

    clutter_actor_set_size (stage, 512, 512);

    clutter_stage_set_color (CLUTTER_STAGE(stage), &stage_color);

    rect1 = create_rect(red);

    rect2 = create_rect(green);

    rect3 = create_rect(blue);

    rect4 = create_rect(yellow);

    rect5 = create_rect(cyan);

    rect6 = create_rect(purple);

    g_signal_connect (stage, "button-press-event", G_CALLBACK (on_stage_button_press), NULL);

    clutter_stage_set_title(CLUTTER_STAGE(stage), "Spinny boxes ahoy!");

    clutter_actor_show (stage);

    clutter_main ();

    return EXIT_SUCCESS;

}

      然后，在msys控制台下，切换到myapp目录执行如下命令

libtool --mode=link gcc -Wall -g -o example.exe example.c /

-I/clutter-work/clutter-cross/include /

`PKG_CONFIG_PATH=/clutter-work/clutter-cross/lib/pkgconfig pkg-config clutter-win32-1.0 --cflags --libs`

      这样会生成example.exe，执行以下，效果不错吧。具体细节参考参考资料1。

      源代码目录下有参考文档，位于clutter-1.2.12/doc/reference目录下。

参考资料：

1. Clutter: a beginner's tutorial