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Implemented most of the mouse event code for GTK+ uiArea.

This commit is contained in:
Pietro Gagliardi 2015-09-11 12:38:37 -04:00
parent 37f7c8c445
commit 3d80f8b11f
1 changed files with 141 additions and 4 deletions
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145
gtkarea/area.c
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@ -12,6 +12,7 @@ struct areaPrivate {
int clientHeight; int clientHeight;
// needed for GtkScrollable // needed for GtkScrollable
GtkScrollablePolicy hpolicy, vpolicy; GtkScrollablePolicy hpolicy, vpolicy;
clickCounter cc;
}; };
static void areaWidget_scrollable_init(GtkScrollable *); static void areaWidget_scrollable_init(GtkScrollable *);
@ -81,6 +82,8 @@ static void areaWidget_init(areaWidget *a)
GDK_SMOOTH_SCROLL_MASK); GDK_SMOOTH_SCROLL_MASK);
gtk_widget_set_can_focus(GTK_WIDGET(a), TRUE); gtk_widget_set_can_focus(GTK_WIDGET(a), TRUE);
clickCounterReset(&(a->priv->cc));
} }
static void areaWidget_dispose(GObject *obj) static void areaWidget_dispose(GObject *obj)
@ -154,7 +157,138 @@ static gboolean areaWidget_draw(GtkWidget *w, cairo_t *cr)
// TODO preferred height/width // TODO preferred height/width
// TODO events // TODO merge with toModifiers?
static guint translateModifiers(guint state, GdkWindow *window)
{
GdkModifierType statetype;
// GDK doesn't initialize the modifier flags fully; we have to explicitly tell it to (thanks to Daniel_S and daniels (two different people) in irc.gimp.net/#gtk+)
statetype = state;
gdk_keymap_add_virtual_modifiers(
gdk_keymap_get_for_display(gdk_window_get_display(window)),
&statetype);
return statetype;
}
static uiModifiers toModifiers(guint state)
{
uiModifiers m;
m = 0;
if ((state & GDK_CONTROL_MASK) != 0))
m |= uiModifierCtrl;
if ((state & GDK_META_MASK) != 0)
m |= uiModifierAlt;
if ((state & GDK_MOD1_MASK) != 0) // GTK+ itself requires this to be Alt (just read through gtkaccelgroup.c)
m |= uiModifierAlt;
if ((state & GDK_SHIFT_MASK) != 0)
m |= uiModifierShift;
if ((state & GDK_SUPER_MASK) != 0)
m |= uiModifierSuper;
return m;
}
static void finishMouseEvent(struct areaPrivate *ap, uiAreaMouseEvent *me, guint mb, gdouble x, gdouble y, guint state, GdkWindow *window)
{
// on GTK+, mouse buttons 4-7 are for scrolling; if we got here, that's a mistake
if (mb >= 4 && mb <= 7)
return;
// if the button ID >= 8, continue counting from 4, as in the MouseEvent spec
if (me->Down >= 8)
me->Down -= 4;
if (me->Up >= 8)
me->Up -= 4;
state = translateModifiers(state, window);
me->Modifiers = toModifiers(state);
// the mb != # checks exclude the Up/Down button from Held
me->Held1To64 = 0;
if (mb != 1 && (state & GDK_BUTTON1_MASK) != 0)
me->Held1To64 |= 1 << 0;
if (mb != 2 && (state & GDK_BUTTON2_MASK) != 0)
me->Held1To64 |= 1 << 1;
if (mb != 3 && (state & GDK_BUTTON3_MASK) != 0)
me->Held1To64 |= 1 << 2;
// don't check GDK_BUTTON4_MASK or GDK_BUTTON5_MASK because those are for the scrolling buttons mentioned above
// GDK expressly does not support any more buttons in the GdkModifierType; see https://git.gnome.org/browse/gtk+/tree/gdk/x11/gdkdevice-xi2.c#n763 (thanks mclasen in irc.gimp.net/#gtk+)
me->X = x;
me->Y = y;
// do not cap to the area bounds in the case of captures
me->HScrollPos = gtk_adjustment_get_value(ap->ha);
me->VScrollPos = gtk_adjustment_get_value(ap->va);
(*(ap->ah->MouseEvent))(ap->ah, ap->a, me);
}
static gboolean areaWidget_button_press_event(GtkWidget *w, GdkEventButton *e)
{
struct areaPrivate *ap = areaWidget(w)->priv;
gint maxTime, maxDistance;
GtkSettings *settings;
uiAreaMouseEvent me;
// clicking doesn't automatically transfer keyboard focus; we must do so manually (thanks tristan in irc.gimp.net/#gtk+)
gtk_widget_grab_focus(w);
// we handle multiple clicks ourselves here, in the same way as we do on Windows
if (e->type != GDK_BUTTON_PRESS)
// ignore GDK's generated double-clicks and beyond
return GDK_EVENT_PROPAGATE;
settings = gtk_widget_get_settings(w);
g_object_get(settings,
"gtk-double-click-time", &maxTime,
"gtk-double-click-distance", &maxDistance,
NULL);
// TODO unref settings?
me.Count = clickCounterClick(&(ap->cc), me.Down,
e->x, e->y,
e->time, maxTime,
maxDistance, maxDistance);
me.Down = e->button;
me.Up = 0;
finishMouseEvent(ap, &me, e->button, e->x, e->y, e->state, e->window);
return GDK_EVENT_PROPAGATE;
}
static gboolean areaWidget_button_release_event(GtkWidget *w, GdkEventButton *e)
{
struct areaPrivate *ap = areaWidget(w)->priv;
uiAreaMouseEvent me;
me.Down = 0;
me.Up = e->button;
me.Count = 0;
finishMouseEvent(ap, &me, e->button, e->x, e->y, e->state, e->window);
return GDK_EVENT_PROPAGATE;
}
static gboolean areaWidget_motion_notify_event(GtkWidget *w, GdkEventMotion *e)
{
struct areaPrivate *ap = areaWidget(w)->priv;
uiAreaMouseEvent me;
me.Down = 0;
me.Up = 0;
me.Count = 0;
finishMouseEvent(ap, &me, 0, e->x, e->y, e->state, e->window);
return GDK_EVENT_PROPAGATE;
}
// we want switching away from the control to reset the double-click counter, like with WM_ACTIVATE on Windows
// according to tristan in irc.gimp.net/#gtk+, doing this on enter-notify-event and leave-notify-event is correct (and it seems to be true in my own tests; plus the events DO get sent when switching programs with the keyboard (just pointing that out))
// differentiating between enter-notify-event and leave-notify-event is unimportant
gboolean areaWidget_enterleave_notify_event(GtkWidget *widget, GdkEventCrossing *e)
{
struct areaPrivate *ap = areaWidget(w)->priv;
clickCounterReset(&(ap->cc));
return GDK_EVENT_PROPAGATE;
}
// TODO key events
enum { enum {
// normal properties must come before override properties // normal properties must come before override properties
@ -248,10 +382,13 @@ static void areaWidget_class_init(areaWidgetClass *class)
GTK_WIDGET_CLASS(class)->draw = areaWidget_draw; GTK_WIDGET_CLASS(class)->draw = areaWidget_draw;
// GTK_WIDGET_CLASS(class)->get_preferred_height = areaWidget_get_preferred_height; // GTK_WIDGET_CLASS(class)->get_preferred_height = areaWidget_get_preferred_height;
// GTK_WIDGET_CLASS(class)->get_preferred_width = areaWidget_get_preferred_width; // GTK_WIDGET_CLASS(class)->get_preferred_width = areaWidget_get_preferred_width;
// GTK_WIDGET_CLASS(class)->button_press_event = areaWidget_button_press_event; GTK_WIDGET_CLASS(class)->button_press_event = areaWidget_button_press_event;
// GTK_WIDGET_CLASS(class)->button_release_event = areaWidget_button_release_event; GTK_WIDGET_CLASS(class)->button_release_event = areaWidget_button_release_event;
// GTK_WIDGET_CLASS(class)->motion_notify_event = areaWidget_motion_notify_event; GTK_WIDGET_CLASS(class)->motion_notify_event = areaWidget_motion_notify_event;
GTK_WIDGET_CLASS(class)->enter_notify_event = areaWidget_enterleave_notify_event;
GTK_WIDGET_CLASS(class)->leave_notify_event = areaWidget_enterleave_notify_event;
// GTK_WIDGET_CLASS(class)->key_press_event = areaWidget_key_press_event; // GTK_WIDGET_CLASS(class)->key_press_event = areaWidget_key_press_event;
// GTK_WIDGET_CLASS(class)->key_release_event = areaWidget_key_release_event;
g_type_class_add_private(G_OBJECT_CLASS(class), sizeof (struct areaPrivate)); g_type_class_add_private(G_OBJECT_CLASS(class), sizeof (struct areaPrivate));