首先,我们需要明确GTK和C语言的基本概念。GTK是一个图形工具包,用于创建跨平台应用程序,而C语言是一种通用编程语言。接下来,我们将讨论如何将光标更改为手表。
#include <gtk/gtk.h>
int main(int argc, char *argv[]) {
GtkWidget *window;
GtkWidget *view;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_title(window, "GTK+ View");
gtk_window_set_default_size(window, 400, 300);
view = gtk_drawing_area_new();
gtk_drawing_area_set_size(view, 400, 300);
gtk_container_add(GTK_CONTAINER(window), view);
gtk_widget_show_all(window);
gtk_main();
return 0;
}
#include <gdk/gdk.h>
#include <gtk/gtk.h>
static void draw_watch(GtkWidget widget, GdkRectangle rect,
gboolean draw_text) {
const gchar *text;
gint hour, minute;
gdk_draw_rectangle(widget->window, widget->style->fg_color, rect,
FALSE, 0, 0, widget->allocation.width,
widget->allocation.height);
if (draw_text) {
text = g_strdup_printf("%02d:%02d", hour, minute);
gdk_draw_text(widget->window, widget->style->font, rect, text,
strlen(text));
g_free(text);
}
}
static gboolean update_time_callback(gpointer data) {
GtkLabel *label = GTK_LABEL(data);
gchar *text;
gint hour, minute;
g_get_current_time(&hour, &minute);
text = g_strdup_printf("%02d:%02d", hour, minute);
gtk_label_set_text(label, text);
g_free(text);
return TRUE;
}
static void create_watch_button(GtkWidget window, GtkWidget box,
gint hour, gint minute) {
GtkWidget *button;
GdkRectangle rect;
gint x, y;
gint width, height;
gchar *text;
button = gtk_button_new_with_label("Watch");
gtk_button_set_relief(GTK_BUTTON(button), GTK_RELIEF_NONE);
gtk_button_set_focus_on_click(GTK_BUTTON(button), FALSE);
x = (box->allocation.width - button->allocation.width) / 2;
y = (box->allocation.height - button->allocation.height) / 2;
rect.x = x;
rect.y = y;
rect.width = button->allocation.width;
rect.height = button->allocation.height;
gtk_container_add(GTK_CONTAINER(button), &rect);
gtk_widget_show(button);
text = g_strdup_printf("%02d:%02d", hour, minute);
gtk_button_set_label(button, text);
g_free(text);
g_signal_connect(button, "clicked",
G_CALLBACK(update_time_callback), label);
}
int main(int argc, char *argv[]) {
GtkWidget *window;
GtkWidget *box;
GtkWidget *view;
GtkLabel *label;
gint hour, minute;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_title(window, "Time");
gtk_window_set_default_size(window, 400, 300);
gtk_window_set_position(window, GTK_WIN_POS_CENTER);
box = gtk_
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