view examples/drag/main.c @ 1401:2fc1f54a1a3b

Mainly fix the clone_from_subtree to update the children of the parent node. We need to clearify all related codes in the future to make the logic more clear.
author wycc
date Sun, 03 Apr 2011 18:12:42 +0800
parents 7f49b501ac4d
children
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/*! \file
 *
 * svg2code_ex is an example that show programmers how to create a
 * menu with MadButterfly.
 *
 */
#include <stdio.h>
#include <mb.h>
#include "menu.h"

typedef struct _engine engine_t;
struct _engine {
    mb_rt_t *rt;
    redraw_man_t *rdman;
    menu_t *menu;
    int state;
    co_aix orx,ory;
    int start_x,start_y;
    coord_t *cursor;
};
engine_t *engine_init()
{

    mb_rt_t *rt;
    rt = mb_runtime_new(":0.0", 800, 600);
    engine_t *en = (engine_t *) malloc(sizeof(engine_t));

    en->rt = rt;
    en->rdman =  mb_runtime_rdman(rt);
    en->state = 0;
    return en;
}
void engine_close(engine_t *en)
{
    /*
     * Start handle connections, includes one to X server.
     * User start to interact with the application.
     */
    mb_runtime_event_loop(en->rt);

    /*
     * Clean
     */
    menu_free(en->menu);
    mb_runtime_free(en->rt);
    free(en);
}
#define COORD_SHOW(group) coord_show(group);rdman_coord_changed(X_MB_rdman(ex_rt->rt), group)
#define COORD_HIDE(group) coord_hide(group);rdman_coord_changed(X_MB_rdman(ex_rt->rt), group)


static void cursor_press_handler(event_t *evt, void *arg) {
    engine_t *en = (engine_t *) arg;
    mouse_event_t *mev = (mouse_event_t *) evt;

    en->start_x = mev->x;
    en->start_y = mev->y;
    en->orx = en->cursor->matrix[2];
    en->ory = en->cursor->matrix[5];
    printf("pressed %g %g\n",en->orx,en->ory);
    en->state = 1;
}

static void cursor_release_handler(event_t *evt, void *arg) {
    engine_t *en = (engine_t *) arg;
    printf("up\n");
    en->state = 0;
}

static void cursor_move_handler(event_t *evt, void *arg) {
    engine_t *en = (engine_t *) arg;
    mouse_event_t *mev = (mouse_event_t *) evt;

    if (en->state) {
        printf("move to (%d %d)\n", mev->x,mev->y);
        coord_move(en->cursor,en->orx + (mev->x-en->start_x),en->ory + (mev->y-en->start_y));
        rdman_coord_changed(en->rdman, en->cursor);
        /* Update changed part to UI. */
        rdman_redraw_changed(en->rdman);
    }
}

int main(int argc, char * const argv[]) {
    subject_t *subject;
    engine_t *en;

    en = engine_init();
    en->menu = menu_new(en->rdman, en->rdman->root_coord);
    en->cursor = (coord_t *) MB_SPRITE_GET_OBJ(&en->menu->lsym.sprite, "star");
    printf("en->cursor=%x star=%x\n",en->cursor,en->menu->star);
    printf("sprite=%x\n",&en->menu->lsym.sprite);
    printf("en->menu=%x\n",en->menu);

    /*
     * Register observers to subjects of events for objects.
     */
    subject = coord_get_mouse_event(en->cursor);
    subject_add_event_observer(subject,  EVT_MOUSE_BUT_PRESS, cursor_press_handler, en);
    subject_add_event_observer(subject,  EVT_MOUSE_BUT_RELEASE, cursor_release_handler, en);
    subject_add_event_observer(subject,  EVT_MOUSE_MOVE, cursor_move_handler, en);


    engine_close(en);

    return 0;
}

/* vim: set ts=4 */