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-   -   Console made of GTK label demo (http://www.daniweb.com/code/snippet737.html)

TkTkorrovi c syntax
Jul 12th, 2007
A small demo about how to use GTK label as a simple console. To compile GTK program, `pkg-config gtk+-2.0 --cflags --libs` should finally be somewhere in the compiler command line in the bash-like shell.
 

  1. #include <gtk/gtk.h>
  2. #include <gdk/gdkkeysyms.h>
  3. #include <string.h>
  4. #define MX 41
  5. #define MY 12
  6.  
  7. int keyb [MX], quit;
  8.  
  9. gint key_press_event (GtkWidget *widget, GdkEventKey *event)
  10. {
  11. 	int i = MX - 1;
  12.  
  13. 	if (event->keyval && !keyb [MX - 1]) {
  14. 		for (; i; i--) keyb [i] = keyb [i - 1];
  15. 		*keyb = event->keyval;
  16. 	}
  17. 	return 1;
  18. }
  19.  
  20. gint delete_event (GtkWidget *widget, gpointer data)
  21. {
  22. 	widget = widget;
  23. 	data = data;
  24. 	return 0;
  25. }
  26.  
  27. void destroy (GtkWidget *widget, gpointer data)
  28. {
  29. 	widget = widget;
  30. 	data = data;
  31. 	quit = 1;
  32. }
  33.  
  34. int main (int argc, char **argv)
  35. {
  36. 	char buf [MY] [MX];
  37. 	int x = 0, y = 0, i = 0, j;
  38. 	GdkColor white = {0, 0xffff, 0xffff, 0xffff},
  39. 		blue = {0, 0, 0, 0xffff};
  40. 	GtkWidget *window, *label;
  41.  
  42. 	gtk_init (&argc, &argv);
  43. 	window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  44. 	gtk_widget_set_size_request (window, 800, 500);
  45. 	gtk_window_set_title (GTK_WINDOW (window), "GTK Label");
  46. 	gtk_window_set_resizable (GTK_WINDOW (window), 0);
  47. 	gtk_container_set_border_width (GTK_CONTAINER (window), 10);
  48. 	gtk_widget_modify_bg (window, GTK_STATE_NORMAL, &white); 
  49. 	g_signal_connect (window, "delete_event", 
  50. 		G_CALLBACK (delete_event), NULL);
  51. 	g_signal_connect (window, "destroy", G_CALLBACK (destroy), NULL);
  52. 	gtk_widget_set_events (window, GDK_KEY_PRESS_MASK);
  53. 	g_signal_connect (G_OBJECT (window), "key_press_event",
  54. 		G_CALLBACK (key_press_event), NULL);
  55. 	label = gtk_label_new ("");
  56. 	gtk_container_add (GTK_CONTAINER (window), label);
  57. 	gtk_widget_modify_font (label,
  58. 		pango_font_description_from_string ("dejavu sans mono 24"));
  59. 	gtk_widget_modify_fg (label, GTK_STATE_NORMAL, &blue);
  60. 	gtk_widget_show_all (window);
  61. 	for (memset (*buf, ' ', MX * MY); i < MY; i++)
  62. 		buf [i] [MX - 1] = '\n';
  63. 	buf [MY - 1] [MX - 1] = 0;
  64. 	for (**buf = '_'; !quit; ) {
  65. 		if (*keyb) {
  66. 			for (i = 0; keyb [i] && i < MX; i++);
  67. 			if (keyb [--i] >= 0x020 && keyb [i] < 0x0b0) {
  68. 				buf [y] [x] = keyb [i];
  69. 				if (x < MX - 2) x++;
  70. 			} else
  71. 				buf [y] [x] = ' ';
  72. 			switch (keyb [i]) {
  73. 				case GDK_Left:
  74. 					x && x--;
  75. 					break;
  76. 				case GDK_Right:
  77. 					if (x < MX - 2) x++;
  78. 					break;
  79. 				case GDK_Up:
  80. 					y && y--;
  81. 					break;
  82. 				case GDK_Return:
  83. 					x = 0;
  84. 				case GDK_Down:
  85. 					if (y < MY - 1) y++;
  86. 					break;
  87. 			}
  88. 			keyb [i] = 0;
  89. 			buf [y] [x] = '_';
  90. 			gtk_label_set_text (GTK_LABEL (label), *buf);
  91. 		}
  92. 		g_usleep (100000l);
  93. 		while (g_main_context_iteration (NULL, 0));
  94. 	}
  95. 	return 0;
  96. }