c - 如何在此示例中实现数组

<分区>

我正在尝试为按钮实现数组，而不是声明

GtkWidget *button1;
GtkWidget *button2;

以防我有更多按钮。这是我的代码，它运行没有错误。我不确定如何实现数组，因为对于每个按钮我还需要一个新的标签名称...并在此处添加另一条数据 g_signal_connect... 这是我的代码:

#include <gtk/gtk.h>

 /* Our new improved callback.  The data passed to this function
    * is printed to stdout. */
   static void callback (GtkWidget *widget, gpointer data)
  {
  system ((gchar *) data);
  }


/* another callback */
static gboolean delete_event (GtkWidget *widget, GdkEvent *event, gpointer data)
{
gtk_main_quit ();
return FALSE;
}

int main (int argc, char *argv[])
{
/* GtkWidget is the storage type for widgets */
GtkWidget *window;
GtkWidget *button1;
GtkWidget *button2;
GtkWidget *box1;

/* This is called in all GTK applications. Arguments are parsed
 * from the command line and are returned to the application. */
gtk_init (&argc, &argv);

/* Create a new window */
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);

/* This is a new call, which just sets the title of our
 * new window to "My Assignments" */
gtk_window_set_title (GTK_WINDOW (window), "My Assignments");

/* Here we just set a handler for delete_event that immediately
 * exits GTK. */
g_signal_connect (window, "delete-event",
                  G_CALLBACK (delete_event), NULL);

/* Sets the border width of the window. */
gtk_container_set_border_width (GTK_CONTAINER (window), 50);

/* We create a box to pack widgets into.  This is described in detail
 * in the "packing" section. The box is not really visible, it
 * is just used as a tool to arrange widgets. */
box1 = gtk_vbox_new (FALSE,0);

/* Put the box into the main window. */
gtk_container_add (GTK_CONTAINER (window), box1);

/*creating 1st button*/

button1 = gtk_button_new_with_label ("Run program1");

g_signal_connect (button1, "clicked",
                  G_CALLBACK (callback), "program1");

gtk_box_pack_start (GTK_BOX (box1), button1, TRUE, TRUE, 0);

gtk_widget_show(button1);
/*creating 2nd button*/

button2 = gtk_button_new_with_label ("Run program2");

g_signal_connect (button2, "clicked",
                  G_CALLBACK (callback), "program2");

gtk_box_pack_start (GTK_BOX (box1), button2, TRUE, TRUE, 0);

gtk_widget_show(button2);

gtk_widget_show (box1);
/* Rest in gtk_main and wait for the fun to begin! */
gtk_main ();

return 0;
}

最佳答案

只需使用:

GtkWidget*  button[NB_BUTTONS];

然后

int i;
for (i = 0: i < NB_BUTTONS; i++)
{
    char lab[16];
    char prg[16];
    sprintf(lab, "Run program%d", i);
    sprintf(prg, "program%d", i);
    button[i] = gtk_button_new_with_label (lab);
    g_signal_connect (button[i], "clicked",
              G_CALLBACK (callback), prg);
}

您还可以这样定义您的标签和程序名称:

char* label[] = {"Run program1", "Run whatever2" /*, ...*/ };
char* progs[] = {"program1", "whatever2" /*, ...*/ };
int i;
for (i = 0: i < NB_BUTTONS; i++)
{
    button[i] = gtk_button_new_with_label (label[i]);
    g_signal_connect (button[i], "clicked",
              G_CALLBACK (callback), progs[i]);
}

关于c - 如何在此示例中实现数组，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36801954/

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