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Try releasing old touches and only letting new ones be dragged

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This commit is contained in:
David Boddie
2019-08-28 15:53:57 +00:00
parent e61a3a6fe8
commit b9ab4288d7
1 changed files with 16 additions and 3 deletions
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19
eek/eek-gtk-keyboard.c
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@ -55,6 +55,8 @@ typedef struct _EekGtkKeyboardPrivate
LevelKeyboard *keyboard; LevelKeyboard *keyboard;
GtkCssProvider *css_provider; GtkCssProvider *css_provider;
GtkStyleContext *scontext; GtkStyleContext *scontext;
GdkEventSequence *sequence; // unowned reference
} EekGtkKeyboardPrivate; } EekGtkKeyboardPrivate;
G_DEFINE_TYPE_WITH_PRIVATE (EekGtkKeyboard, eek_gtk_keyboard, GTK_TYPE_DRAWING_AREA) G_DEFINE_TYPE_WITH_PRIVATE (EekGtkKeyboard, eek_gtk_keyboard, GTK_TYPE_DRAWING_AREA)
@ -249,18 +251,29 @@ handle_touch_event (GtkWidget *widget,
GdkEventTouch *event) GdkEventTouch *event)
{ {
EekGtkKeyboard *self = EEK_GTK_KEYBOARD (widget); EekGtkKeyboard *self = EEK_GTK_KEYBOARD (widget);
EekGtkKeyboardPrivate *priv = eek_gtk_keyboard_get_instance_private (self);
/* For each new touch, release the previous one and record the new event
sequence. */
if (event->type == GDK_TOUCH_BEGIN) { if (event->type == GDK_TOUCH_BEGIN) {
release(self, event->time);
priv->sequence = event->sequence;
depress(self, event->x, event->y, event->time); depress(self, event->x, event->y, event->time);
return TRUE; return TRUE;
} }
if (event->type == GDK_TOUCH_UPDATE) { /* Only allow the latest touch point to be dragged. */
if (event->type == GDK_TOUCH_UPDATE && event->sequence == priv->sequence) {
drag(self, event->x, event->y, event->time); drag(self, event->x, event->y, event->time);
} }
if (event->type == GDK_TOUCH_END || event->type == GDK_TOUCH_CANCEL) { else if (event->type == GDK_TOUCH_END || event->type == GDK_TOUCH_CANCEL) {
// TODO: can the event have different coords than the previous update event? // TODO: can the event have different coords than the previous update event?
release(self, event->time); /* Only respond to the release of the latest touch point. Previous
touches have already been released. */
if (event->sequence == priv->sequence) {
release(self, event->time);
priv->sequence = NULL;
}
} }
return TRUE; return TRUE;
} }