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這裏是我的代碼： 如果我嘗試使用循環在屏幕上放置多張卡片，我只能獲得最後一張 卡片，如果我不使用循環並且只嘗試處理它處理的一張卡片正好。 我的一些代碼來自Stack Overflow，有些來自其他來源。我已經有了「設置甲板」，「改變甲板」，以及大部分玩慣例的程序，但是這讓我很難過。如何在GTK的圖形屏幕上處理多個圖像？
#include <cairo.h>
#include <gtk/gtk.h>
/* Global Structure to hold
1. The image to be moved across the screen
2. The main window
3. The fixed surface so that I can place event boxes on it
4. The Start and End locations for the image
5. a counter
6. an animation counter
7. a boolean timer
8. a tid for the timeout
*/
struct {
GtkWidget *image;
GtkWidget *window;
GtkWidget *fixed;
gint initC, initR;
gint endC, endR;
gint count;
gint animations;
gboolean timer;
guint tid;
} glob;
// finalizes g_object_weak_ref for images
static void finalized(G_GNUC_UNUSED gpointer unused, G_GNUC_UNUSED GObject *Data)
{
g_print("Card finalized.\n");
}
// my drawing routine from Stack OverFlow
static void do_drawing()
{
gint x, y;
gdouble scale;
// The scale tells us where to place the image
scale = (gdouble) glob.count/(gdouble) glob.animations;
// The new position adds the progress to the initial
x = (scale * (glob.endC - glob.initC)) + glob.initC;
y = (scale * (glob.endR - glob.initR)) + glob.initR;
g_object_ref(glob.image);
g_object_weak_ref(G_OBJECT(glob.image), finalized, NULL);
if(glob.count == 0)
{ gtk_fixed_put ((GtkFixed *)glob.fixed, glob.image, x, y); }
gtk_fixed_move ((GtkFixed *)glob.fixed, glob.image , x, y);
gtk_widget_show(glob.image);
glob.count++;
// If this has run 'animations' times, remove
// the timeout by returning FALSE
if(glob.count >= glob.animations)
glob.timer = FALSE;
// Otherwise, continue running the timeout
}
// time handler for g_timeout_add
static gboolean time_handler()
{
if (glob.timer == FALSE) return FALSE;
do_drawing();
return TRUE;
}
static void deal()
{
// Initialize the cards to deal
gchar *names[7] = { "Card1.png", "Card2.png", "Card3.png", "Card4.png", "Card5.png", "Card6.png", "Card7.png" };
guint i = 0;
// Initialize the global holder for the animation
// with the start location and end location
// initC = initial Column, initR = initial Row
glob.timer = TRUE;
glob.count = 0;
glob.initC = 500;
glob.initR = 15;
glob.endC = 5;
glob.endR = 495;
glob.animations = 50;
/* This does not work it only shows
the last iteration of the images (Card7)
if I do not use a loop and only do
one, it works just fine but only for one card
*/
do
{
glob.image = gtk_image_new_from_file(names[ i ]);
glob.tid = g_timeout_add(530, (GSourceFunc) time_handler, NULL);
g_print("Tid = %d \n", glob.tid);
glob.endC = glob.endC + 70;
i++;
/* If I try to use g_source_remove nothing works
// g_source_remove(glob.tid);
*/
} while(i < 7);
}
int main(int argc, char *argv[])
{
GtkWidget *bkgd;
gint i;
gtk_init(&argc, &argv);
glob.fixed = gtk_fixed_new();
bkgd = gtk_image_new_from_file ("BackGround.jpg");
gtk_container_add(GTK_CONTAINER(glob.fixed), bkgd);
glob.window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_container_add(GTK_CONTAINER(glob.window), glob.fixed);
g_signal_connect(glob.window, "destroy",
G_CALLBACK (gtk_main_quit), NULL);
gtk_window_set_position(GTK_WINDOW(glob.window), GTK_WIN_POS_CENTER);
gtk_window_set_default_size(GTK_WINDOW(glob.window), 1000, 550);
gtk_window_set_title(GTK_WINDOW(glob.window), "Image");
deal();
gtk_widget_show_all(glob.window);
gtk_main();
// Apparently not needed
// g_object_unref(glob.image);
return 0;
}