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puzzle: Add mouse support

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Make it so that clicking on a puzzle piece moves enough
pieces to move the empty space there, if it is possible.
This commit is contained in:
Matthias Clasen 2018-06-07 17:38:24 -04:00
parent ebf042d305
commit 1ee23d0d49
1 changed files with 68 additions and 0 deletions
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68
demos/gtk-demo/sliding_puzzle.c
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@ -219,6 +219,68 @@ puzzle_key_pressed (GtkEventControllerKey *controller,
return TRUE;
}
static void
puzzle_button_pressed (GtkGestureMultiPress *gesture,
int n_press,
double x,
double y,
GtkWidget *grid)
{
GtkWidget *child;
int l, t, i;
int pos;
child = gtk_widget_pick (grid, x, y);
if (!child)
{
gtk_widget_error_bell (grid);
return;
}
gtk_container_child_get (GTK_CONTAINER (grid), child,
"left-attach", &l,
"top-attach", &t,
NULL);
if (l == pos_x && t == pos_y)
{
gtk_widget_error_bell (grid);
}
else if (l == pos_x)
{
pos = pos_y;
for (i = t; i < pos; i++)
{
if (!move_puzzle (grid, 0, -1))
gtk_widget_error_bell (grid);
}
for (i = pos; i < t; i++)
{
if (!move_puzzle (grid, 0, 1))
gtk_widget_error_bell (grid);
}
}
else if (t == pos_y)
{
pos = pos_x;
for (i = l; i < pos; i++)
{
if (!move_puzzle (grid, -1, 0))
gtk_widget_error_bell (grid);
}
for (i = pos; i < l; i++)
{
if (!move_puzzle (grid, 1, 0))
gtk_widget_error_bell (grid);
}
}
else
{
gtk_widget_error_bell (grid);
}
}
static void
start_puzzle (GdkPaintable *puzzle)
{
@ -244,6 +306,12 @@ start_puzzle (GdkPaintable *puzzle)
grid);
gtk_widget_add_controller (GTK_WIDGET (grid), controller);
controller = gtk_gesture_multi_press_new ();
g_signal_connect (controller, "pressed",
G_CALLBACK (puzzle_button_pressed),
grid);
gtk_widget_add_controller (GTK_WIDGET (grid), controller);
/* Make sure the cells have equal size */
gtk_grid_set_row_homogeneous (GTK_GRID (grid), TRUE);
gtk_grid_set_column_homogeneous (GTK_GRID (grid), TRUE);