GTK3/Cairo 버튼 클릭시 이벤트 처리
2015.03.16 03:24
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/*
============================================================================
Name : cairo_hello_world.c
Author : swshin
Version : not versioned
Copyright : team maniac.
Description : Hello World in GTK+
============================================================================
*/#include <string.h>
#include <gtk/gtk.h>char myHello[255] = "Hello world.";
int stats = 0;// 아래 함수 먼저 선언되어야 동작 됨.
static void do_drawing(cairo_t *);static gboolean do_text_change(GtkWidget *widget, cairo_t *cr, gpointer user_data) {
if (stats == 0) {
strcpy(myHello, "Hi Button.");
stats = 1;
} else {
strcpy(myHello, "Hello World.");
stats = 0;
}return FALSE;
}static gboolean on_draw_event(GtkWidget *widget, cairo_t *cr,
gpointer user_data) {
// 아래 두 줄 다 있어야 바로 반응함.
// 두번째줄 없으면 바로 반응 안하고 다른 창 갔다와야 반응함.
do_drawing(cr);
gtk_widget_queue_draw(widget);return FALSE;
}static void do_drawing(cairo_t *cr) {
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_set_font_size(cr, 40.0);cairo_move_to(cr, 10.0, 50.0);
cairo_show_text(cr, myHello);
}int main(int argc, char *argv[]) {
GtkWidget *window;
GtkWidget *box;
GtkWidget *button1;
GtkWidget *darea;gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 1);
button1 = gtk_button_new_with_label("Change text");
darea = gtk_drawing_area_new();gtk_box_pack_start(GTK_BOX(box), darea, TRUE, TRUE, 0);
gtk_box_pack_start(GTK_BOX(box), button1, TRUE, TRUE, 0);
gtk_container_add(GTK_CONTAINER(window), box);g_signal_connect(G_OBJECT(darea), "draw", G_CALLBACK(on_draw_event), NULL);
g_signal_connect(button1, "clicked", G_CALLBACK(do_text_change), NULL);
g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);gtk_window_set_default_size(GTK_WINDOW(window), 250, 150);
gtk_window_set_title(GTK_WINDOW(window), "GTK window");gtk_widget_show_all(window);
gtk_main();
return 0;
}
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