forked from AuroraMiddleware/gtk
478 lines
13 KiB
C
478 lines
13 KiB
C
/* Sliding puzzle
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*
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* This demo demonstrates how to use gestures and paintables to create a
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* small sliding puzzle game.
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*
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*/
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#include <gtk/gtk.h>
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/* Include the header for the puzzle piece */
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#include "puzzlepiece.h"
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#include "paintable.h"
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static GtkWidget *window = NULL;
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static GtkWidget *frame = NULL;
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static GtkWidget *choices = NULL;
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static GtkWidget *size_spin = NULL;
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static GdkPaintable *puzzle = NULL;
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static gboolean solved = TRUE;
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static guint width = 3;
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static guint height = 3;
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static guint pos_x;
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static guint pos_y;
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static gboolean
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move_puzzle (GtkWidget *grid,
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int dx,
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int dy)
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{
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GtkWidget *pos, *next;
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GdkPaintable *piece;
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guint next_x, next_y;
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/* We don't move anything if the puzzle is solved */
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if (solved)
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return FALSE;
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/* Return FALSE if we can't move to where the call
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* wants us to move.
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*/
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if ((dx < 0 && pos_x < -dx) ||
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dx + pos_x >= width ||
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(dy < 0 && pos_y < -dy) ||
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dy + pos_y >= height)
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return FALSE;
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/* Compute the new position */
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next_x = pos_x + dx;
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next_y = pos_y + dy;
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/* Get the current and next image */
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pos = gtk_grid_get_child_at (GTK_GRID (grid), pos_x, pos_y);
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next = gtk_grid_get_child_at (GTK_GRID (grid), next_x, next_y);
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/* Move the displayed piece. */
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piece = gtk_picture_get_paintable (GTK_PICTURE (next));
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gtk_picture_set_paintable (GTK_PICTURE (pos), piece);
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gtk_picture_set_paintable (GTK_PICTURE (next), NULL);
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/* Update the current position */
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pos_x = next_x;
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pos_y = next_y;
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/* Return TRUE because we successfully moved the piece */
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return TRUE;
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}
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static void
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shuffle_puzzle (GtkWidget *grid)
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{
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guint i, n_steps;
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/* Do this many random moves */
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n_steps = width * height * 50;
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for (i = 0; i < n_steps; i++)
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{
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/* Get a random number for the direction to move in */
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switch (g_random_int_range (0, 4))
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{
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case 0:
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/* left */
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move_puzzle (grid, -1, 0);
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break;
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case 1:
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/* up */
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move_puzzle (grid, 0, -1);
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break;
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case 2:
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/* right */
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move_puzzle (grid, 1, 0);
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break;
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case 3:
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/* down */
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move_puzzle (grid, 0, 1);
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break;
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default:
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g_assert_not_reached ();
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continue;
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}
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}
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}
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static gboolean
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check_solved (GtkWidget *grid)
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{
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GtkWidget *picture;
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GdkPaintable *piece;
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guint x, y;
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/* Nothing to check if the puzzle is already solved */
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if (solved)
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return TRUE;
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/* If the empty cell isn't in the bottom right,
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* the puzzle is obviously not solved */
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if (pos_x != width - 1 ||
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pos_y != height - 1)
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return FALSE;
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/* Check that all pieces are in the right position */
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for (y = 0; y < height; y++)
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{
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for (x = 0; x < width; x++)
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{
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picture = gtk_grid_get_child_at (GTK_GRID (grid), x, y);
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piece = gtk_picture_get_paintable (GTK_PICTURE (picture));
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/* empty cell */
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if (piece == NULL)
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continue;
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if (gtk_puzzle_piece_get_x (GTK_PUZZLE_PIECE (piece)) != x ||
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gtk_puzzle_piece_get_y (GTK_PUZZLE_PIECE (piece)) != y)
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return FALSE;
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}
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}
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/* We solved the puzzle!
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*/
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solved = TRUE;
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/* Fill the empty cell to show that we're done.
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*/
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picture = gtk_grid_get_child_at (GTK_GRID (grid), 0, 0);
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piece = gtk_picture_get_paintable (GTK_PICTURE (picture));
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piece = gtk_puzzle_piece_new (gtk_puzzle_piece_get_puzzle (GTK_PUZZLE_PIECE (piece)),
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pos_x, pos_y,
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width, height);
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picture = gtk_grid_get_child_at (GTK_GRID (grid), pos_x, pos_y);
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gtk_picture_set_paintable (GTK_PICTURE (picture), piece);
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return TRUE;
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}
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static gboolean
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puzzle_key_pressed (GtkWidget *grid,
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GVariant *args,
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gpointer unused)
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{
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int dx, dy;
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g_variant_get (args, "(ii)", &dx, &dy);
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if (!move_puzzle (grid, dx, dy))
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{
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/* Make the error sound and then return TRUE.
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* We handled this key, even though we didn't
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* do anything to the puzzle.
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*/
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gtk_widget_error_bell (grid);
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return TRUE;
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}
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check_solved (grid);
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return TRUE;
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}
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static void
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puzzle_button_pressed (GtkGestureClick *gesture,
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int n_press,
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double x,
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double y,
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GtkWidget *grid)
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{
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GtkWidget *child;
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int l, t, i;
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int pos;
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child = gtk_widget_pick (grid, x, y, GTK_PICK_DEFAULT);
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if (!child)
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{
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gtk_widget_error_bell (grid);
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return;
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}
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gtk_grid_query_child (GTK_GRID (grid), child, &l, &t, NULL, NULL);
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if (l == pos_x && t == pos_y)
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{
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gtk_widget_error_bell (grid);
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}
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else if (l == pos_x)
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{
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pos = pos_y;
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for (i = t; i < pos; i++)
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{
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if (!move_puzzle (grid, 0, -1))
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gtk_widget_error_bell (grid);
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}
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for (i = pos; i < t; i++)
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{
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if (!move_puzzle (grid, 0, 1))
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gtk_widget_error_bell (grid);
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}
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}
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else if (t == pos_y)
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{
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pos = pos_x;
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for (i = l; i < pos; i++)
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{
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if (!move_puzzle (grid, -1, 0))
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gtk_widget_error_bell (grid);
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}
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for (i = pos; i < l; i++)
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{
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if (!move_puzzle (grid, 1, 0))
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gtk_widget_error_bell (grid);
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}
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}
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else
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{
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gtk_widget_error_bell (grid);
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}
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}
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static void
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add_move_binding (GtkShortcutController *controller,
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guint keyval,
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guint kp_keyval,
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int dx,
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int dy)
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{
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GtkShortcut *shortcut;
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shortcut = gtk_shortcut_new_with_arguments (
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gtk_alternative_trigger_new (gtk_keyval_trigger_new (keyval, 0),
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gtk_keyval_trigger_new (kp_keyval, 0)),
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gtk_callback_action_new (puzzle_key_pressed, NULL, NULL),
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"(ii)", dx, dy);
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gtk_shortcut_controller_add_shortcut (controller, shortcut);
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}
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static void
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start_puzzle (GdkPaintable *paintable)
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{
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GtkWidget *picture, *grid;
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GtkEventController *controller;
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guint x, y;
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float aspect_ratio;
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/* Create a new grid */
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grid = gtk_grid_new ();
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gtk_widget_set_can_focus (grid, TRUE);
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gtk_aspect_frame_set_child (GTK_ASPECT_FRAME (frame), grid);
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aspect_ratio = gdk_paintable_get_intrinsic_aspect_ratio (paintable);
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if (aspect_ratio == 0.0)
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aspect_ratio = 1.0;
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gtk_aspect_frame_set_ratio (GTK_ASPECT_FRAME (frame), aspect_ratio);
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gtk_aspect_frame_set_obey_child (GTK_ASPECT_FRAME (frame), FALSE);
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/* Add shortcuts so people can use the arrow
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* keys to move the puzzle */
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controller = gtk_shortcut_controller_new ();
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add_move_binding (GTK_SHORTCUT_CONTROLLER (controller),
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GDK_KEY_Left, GDK_KEY_KP_Left,
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-1, 0);
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add_move_binding (GTK_SHORTCUT_CONTROLLER (controller),
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GDK_KEY_Right, GDK_KEY_KP_Right,
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1, 0);
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add_move_binding (GTK_SHORTCUT_CONTROLLER (controller),
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GDK_KEY_Up, GDK_KEY_KP_Up,
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0, -1);
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add_move_binding (GTK_SHORTCUT_CONTROLLER (controller),
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GDK_KEY_Down, GDK_KEY_KP_Down,
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0, 1);
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gtk_widget_add_controller (GTK_WIDGET (grid), controller);
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controller = GTK_EVENT_CONTROLLER (gtk_gesture_click_new ());
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g_signal_connect (controller, "pressed",
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G_CALLBACK (puzzle_button_pressed),
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grid);
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gtk_widget_add_controller (GTK_WIDGET (grid), controller);
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/* Make sure the cells have equal size */
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gtk_grid_set_row_homogeneous (GTK_GRID (grid), TRUE);
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gtk_grid_set_column_homogeneous (GTK_GRID (grid), TRUE);
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/* Reset the variables */
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solved = FALSE;
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pos_x = width - 1;
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pos_y = height - 1;
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/* add a picture for every cell */
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for (y = 0; y < height; y++)
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{
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for (x = 0; x < width; x++)
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{
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GdkPaintable *piece;
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/* Don't paint anything for the lsiding part of the video */
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if (x == pos_x && y == pos_y)
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piece = NULL;
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else
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piece = gtk_puzzle_piece_new (paintable,
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x, y,
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width, height);
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picture = gtk_picture_new_for_paintable (piece);
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gtk_picture_set_keep_aspect_ratio (GTK_PICTURE (picture), FALSE);
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gtk_grid_attach (GTK_GRID (grid),
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picture,
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x, y,
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1, 1);
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}
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}
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shuffle_puzzle (grid);
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}
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static void
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reshuffle (void)
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{
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GtkWidget *grid;
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grid = gtk_aspect_frame_get_child (GTK_ASPECT_FRAME (frame));
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if (solved)
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start_puzzle (puzzle);
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else
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shuffle_puzzle (grid);
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gtk_widget_grab_focus (grid);
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}
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static void
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reconfigure (void)
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{
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GtkWidget *popover;
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GtkWidget *grid;
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GtkWidget *child;
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GtkWidget *image;
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GList *selected;
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width = height = gtk_spin_button_get_value_as_int (GTK_SPIN_BUTTON (size_spin));
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selected = gtk_flow_box_get_selected_children (GTK_FLOW_BOX (choices));
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if (selected == NULL)
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child = gtk_widget_get_first_child (choices);
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else
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{
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child = selected->data;
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g_list_free (selected);
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}
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image = gtk_flow_box_child_get_child (GTK_FLOW_BOX_CHILD (child));
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puzzle = gtk_image_get_paintable (GTK_IMAGE (image));
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start_puzzle (puzzle);
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popover = gtk_widget_get_ancestor (size_spin, GTK_TYPE_POPOVER);
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gtk_popover_popdown (GTK_POPOVER (popover));
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grid = gtk_aspect_frame_get_child (GTK_ASPECT_FRAME (frame));
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gtk_widget_grab_focus (grid);
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}
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static void
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add_choice (GtkWidget *container,
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GdkPaintable *paintable)
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{
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GtkWidget *icon;
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icon = gtk_image_new_from_paintable (paintable);
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gtk_image_set_icon_size (GTK_IMAGE (icon), GTK_ICON_SIZE_LARGE);
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gtk_box_append (GTK_BOX (container), icon);
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}
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GtkWidget *
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do_sliding_puzzle (GtkWidget *do_widget)
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{
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if (!window)
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{
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GtkWidget *header;
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GtkWidget *restart;
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GtkWidget *tweak;
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GtkWidget *popover;
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GtkWidget *tweaks;
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GtkWidget *apply;
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GtkWidget *label;
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GtkWidget *sw;
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GtkMediaStream *media;
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puzzle = GDK_PAINTABLE (gdk_texture_new_from_resource ("/sliding_puzzle/portland-rose.jpg"));
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tweaks = gtk_grid_new ();
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gtk_grid_set_row_spacing (GTK_GRID (tweaks), 10);
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gtk_grid_set_column_spacing (GTK_GRID (tweaks), 10);
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gtk_widget_set_margin_start (tweaks, 10);
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gtk_widget_set_margin_end (tweaks, 10);
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gtk_widget_set_margin_top (tweaks, 10);
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gtk_widget_set_margin_bottom (tweaks, 10);
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choices = gtk_flow_box_new ();
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gtk_widget_add_css_class (choices, GTK_STYLE_CLASS_VIEW);
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add_choice (choices, puzzle);
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add_choice (choices, gtk_nuclear_animation_new ());
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media = gtk_media_file_new_for_resource ("/images/gtk-logo.webm");
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gtk_media_stream_set_loop (media, TRUE);
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gtk_media_stream_set_muted (media, TRUE);
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gtk_media_stream_play (media);
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add_choice (choices, GDK_PAINTABLE (media));
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sw = gtk_scrolled_window_new (NULL, NULL);
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gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), choices);
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gtk_grid_attach (GTK_GRID (tweaks), sw, 0, 0, 2, 1);
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label = gtk_label_new ("Size");
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gtk_label_set_xalign (GTK_LABEL (label), 0.0);
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gtk_grid_attach (GTK_GRID (tweaks), label, 0, 1, 1, 1);
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size_spin = gtk_spin_button_new_with_range (2, 10, 1);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (size_spin), width);
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gtk_grid_attach (GTK_GRID (tweaks), size_spin, 1, 1, 1, 1);
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apply = gtk_button_new_with_label ("Apply");
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gtk_widget_set_halign (apply, GTK_ALIGN_END);
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gtk_grid_attach (GTK_GRID (tweaks), apply, 1, 2, 1, 1);
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g_signal_connect (apply, "clicked", G_CALLBACK (reconfigure), NULL);
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popover = gtk_popover_new ();
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gtk_popover_set_child (GTK_POPOVER (popover), tweaks);
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tweak = gtk_menu_button_new ();
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gtk_menu_button_set_popover (GTK_MENU_BUTTON (tweak), popover);
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gtk_menu_button_set_icon_name (GTK_MENU_BUTTON (tweak), "emblem-system-symbolic");
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restart = gtk_button_new_from_icon_name ("view-refresh-symbolic");
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g_signal_connect (restart, "clicked", G_CALLBACK (reshuffle), NULL);
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header = gtk_header_bar_new ();
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gtk_header_bar_set_show_title_buttons (GTK_HEADER_BAR (header), TRUE);
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gtk_header_bar_pack_start (GTK_HEADER_BAR (header), restart);
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gtk_header_bar_pack_end (GTK_HEADER_BAR (header), tweak);
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window = gtk_window_new ();
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gtk_window_set_display (GTK_WINDOW (window),
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gtk_widget_get_display (do_widget));
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gtk_window_set_title (GTK_WINDOW (window), "Sliding Puzzle");
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gtk_window_set_titlebar (GTK_WINDOW (window), header);
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gtk_window_set_default_size (GTK_WINDOW (window), 400, 300);
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g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);
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frame = gtk_aspect_frame_new (0.5, 0.5, (float) gdk_paintable_get_intrinsic_aspect_ratio (puzzle), FALSE);
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gtk_window_set_child (GTK_WINDOW (window), frame);
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start_puzzle (puzzle);
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}
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if (!gtk_widget_get_visible (window))
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gtk_widget_show (window);
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else
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gtk_window_destroy (GTK_WINDOW (window));
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return window;
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}
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