DEV/flutter_flutter
1
0
Fork 0
mirror of https://github.com/flutter/flutter.git synced 2026-02-20 02:29:02 +08:00
Code Issues Packages Projects Releases Wiki Activity

Add pointer events to the Linux shell (flutter/engine#17304)

Browse Source
This commit is contained in:
Robert Ancell 2020-04-21 11:27:13 +12:00 committed by GitHub
parent 9b4aac9cf6
commit d8cc8645bc
1 changed files with 95 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

96
engine/src/flutter/shell/platform/linux/fl_view.cc
View File

@ -20,6 +20,7 @@ struct _FlView {
FlDartProject* flutter_project;
FLUTTER_API_SYMBOL(FlutterEngine) flutter_engine;
int64_t button_state;
};
enum { PROP_FLUTTER_PROJECT = 1, PROP_LAST };
@ -152,6 +153,56 @@ static gboolean run_flutter_engine(FlView* self) {
return TRUE;
}
/* Convert a GDK button event into a Flutter event and send to the engine */
static gboolean fl_view_send_pointer_button_event(FlView* self,
GdkEventButton* event) {
FlutterPointerEvent fl_event = {};
fl_event.struct_size = sizeof(fl_event);
fl_event.timestamp = event->time * 1000;
int64_t button;
switch (event->button) {
case 1:
button = kFlutterPointerButtonMousePrimary;
break;
case 2:
button = kFlutterPointerButtonMouseMiddle;
break;
case 3:
button = kFlutterPointerButtonMouseSecondary;
break;
default:
return FALSE;
}
int old_button_state = self->button_state;
if (event->type == GDK_BUTTON_PRESS) {
// Drop the event if Flutter already thinks the button is down
if ((self->button_state & button) != 0)
return FALSE;
self->button_state ^= button;
fl_event.phase = old_button_state == 0 ? kDown : kMove;
} else if (event->type == GDK_BUTTON_RELEASE) {
// Drop the event if Flutter already thinks the button is up
if ((self->button_state & button) == 0)
return FALSE;
self->button_state ^= button;
fl_event.phase = self->button_state == 0 ? kUp : kMove;
}
if (self->flutter_engine == nullptr)
return FALSE;
fl_event.x = event->x;
fl_event.y = event->y;
fl_event.device_kind = kFlutterPointerDeviceKindMouse;
fl_event.buttons = self->button_state;
FlutterEngineSendPointerEvent(self->flutter_engine, &fl_event, 1);
return TRUE;
}
static void fl_view_set_property(GObject* object,
guint prop_id,
const GValue* value,
@ -220,7 +271,8 @@ static void fl_view_realize(GtkWidget* widget) {
window_attributes.wclass = GDK_INPUT_OUTPUT;
window_attributes.visual = gtk_widget_get_visual(widget);
window_attributes.event_mask =
gtk_widget_get_events(widget) | GDK_EXPOSURE_MASK;
gtk_widget_get_events(widget) | GDK_EXPOSURE_MASK |
GDK_POINTER_MOTION_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK;
gint window_attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
@ -254,12 +306,54 @@ static void fl_view_size_allocate(GtkWidget* widget,
FlutterEngineSendWindowMetricsEvent(self->flutter_engine, &event);
}
static gboolean fl_view_button_press_event(GtkWidget* widget,
GdkEventButton* event) {
FlView* self = FL_VIEW(widget);
// Flutter doesn't handle double and triple click events
if (event->type == GDK_DOUBLE_BUTTON_PRESS ||
event->type == GDK_TRIPLE_BUTTON_PRESS)
return FALSE;
return fl_view_send_pointer_button_event(self, event);
}
static gboolean fl_view_button_release_event(GtkWidget* widget,
GdkEventButton* event) {
FlView* self = FL_VIEW(widget);
return fl_view_send_pointer_button_event(self, event);
}
static gboolean fl_view_motion_notify_event(GtkWidget* widget,
GdkEventMotion* event) {
FlView* self = FL_VIEW(widget);
if (self->flutter_engine == nullptr)
return FALSE;
FlutterPointerEvent fl_event = {};
fl_event.struct_size = sizeof(fl_event);
fl_event.timestamp = event->time * 1000;
fl_event.phase = self->button_state != 0 ? kMove : kHover;
fl_event.x = event->x;
fl_event.y = event->y;
fl_event.device_kind = kFlutterPointerDeviceKindMouse;
fl_event.buttons = self->button_state;
FlutterEngineSendPointerEvent(self->flutter_engine, &fl_event, 1);
return TRUE;
}
static void fl_view_class_init(FlViewClass* klass) {
G_OBJECT_CLASS(klass)->set_property = fl_view_set_property;
G_OBJECT_CLASS(klass)->get_property = fl_view_get_property;
G_OBJECT_CLASS(klass)->dispose = fl_view_dispose;
GTK_WIDGET_CLASS(klass)->realize = fl_view_realize;
GTK_WIDGET_CLASS(klass)->size_allocate = fl_view_size_allocate;
GTK_WIDGET_CLASS(klass)->button_press_event = fl_view_button_press_event;
GTK_WIDGET_CLASS(klass)->button_release_event = fl_view_button_release_event;
GTK_WIDGET_CLASS(klass)->motion_notify_event = fl_view_motion_notify_event;
g_object_class_install_property(
G_OBJECT_CLASS(klass), PROP_FLUTTER_PROJECT,