karma/flying-balls
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added game pause/resume toggle

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This commit is contained in:
Antonio Carzaniga 2022-12-28 12:42:14 +01:00
parent 6078f57647
commit 19125826bd
1 changed files with 50 additions and 28 deletions
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48
main.cc
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@ -62,6 +62,22 @@ void game_destroy () {
balls_destroy (); balls_destroy ();
} }
static guint timeout_source_id = 0;
gboolean timeout (gpointer user_data);
static bool game_paused () {
return timeout_source_id == 0;
}
void game_animation_on_off () {
if (timeout_source_id == 0) {
timeout_source_id = g_timeout_add (delta * 1000, timeout, canvas);
} else {
g_source_remove (timeout_source_id);
timeout_source_id = 0;
}
}
gboolean draw_frame (GtkWidget * widget, cairo_t *cr, gpointer data) { gboolean draw_frame (GtkWidget * widget, cairo_t *cr, gpointer data) {
cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0); cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
cairo_paint(cr); cairo_paint(cr);
@ -88,41 +104,47 @@ gint configure_event (GtkWidget *widget, GdkEventConfigure * event) {
gint keyboard_input (GtkWidget *widget, GdkEventKey *event) { gint keyboard_input (GtkWidget *widget, GdkEventKey *event) {
if (event->type != GDK_KEY_PRESS) if (event->type != GDK_KEY_PRESS)
return FALSE; return FALSE;
if (! game_paused ()) {
switch(event->keyval) { switch(event->keyval) {
case GDK_KEY_Up: case GDK_KEY_Up:
gravity_change (0, -10); gravity_change (0, -10);
break; return TRUE;
case GDK_KEY_Down: case GDK_KEY_Down:
gravity_change (0, 10); gravity_change (0, 10);
break; return TRUE;
case GDK_KEY_Left: case GDK_KEY_Left:
gravity_change (-10, 0); gravity_change (-10, 0);
break; return TRUE;
case GDK_KEY_Right: case GDK_KEY_Right:
gravity_change (10, 0); gravity_change (10, 0);
break; return TRUE;
case GDK_KEY_R: case GDK_KEY_R:
restitution_coefficient_change (0.01); restitution_coefficient_change (0.01);
break; return TRUE;
case GDK_KEY_r: case GDK_KEY_r:
restitution_coefficient_change (-0.01); restitution_coefficient_change (-0.01);
break; return TRUE;
case GDK_KEY_G: case GDK_KEY_G:
case GDK_KEY_g: case GDK_KEY_g:
gravity_show (); gravity_show ();
break; return TRUE;
}
}
switch(event->keyval) {
case GDK_KEY_P:
case GDK_KEY_p:
game_animation_on_off ();
return TRUE;
case GDK_KEY_Q: case GDK_KEY_Q:
case GDK_KEY_q: case GDK_KEY_q:
gtk_main_quit(); gtk_main_quit();
break;
default:
return FALSE;
}
return TRUE; return TRUE;
}
return FALSE;
} }
gboolean mouse_scroll (GtkWidget *widget, GdkEvent *event, gpointer user_data) { gboolean mouse_scroll (GtkWidget *widget, GdkEvent *event, gpointer user_data) {
if (event->type == GDK_SCROLL) { if (event->type == GDK_SCROLL && ! game_paused ()) {
GdkEventScroll * e = (GdkEventScroll*) event; GdkEventScroll * e = (GdkEventScroll*) event;
switch (e->direction) { switch (e->direction) {
case GDK_SCROLL_SMOOTH: { case GDK_SCROLL_SMOOTH: {
@ -285,7 +307,7 @@ int main (int argc, const char *argv[]) {
gtk_container_add (GTK_CONTAINER (window), canvas); gtk_container_add (GTK_CONTAINER (window), canvas);
g_timeout_add (delta * 1000, timeout, canvas); game_animation_on_off ();
gtk_widget_show_all(window); gtk_widget_show_all(window);