6 #include "flutter/shell/platform/embedder/embedder.h"
31 G_DEFINE_TYPE(FlScrollingManager, fl_scrolling_manager, G_TYPE_OBJECT);
34 FlScrollingManager*
self = FL_SCROLLING_MANAGER(
object);
36 g_weak_ref_clear(&self->engine);
38 G_OBJECT_CLASS(fl_scrolling_manager_parent_class)->dispose(
object);
48 FlutterViewId view_id) {
49 g_return_val_if_fail(FL_IS_ENGINE(engine),
nullptr);
51 FlScrollingManager*
self = FL_SCROLLING_MANAGER(
52 g_object_new(fl_scrolling_manager_get_type(),
nullptr));
54 g_weak_ref_init(&self->engine, engine);
55 self->view_id = view_id;
56 self->pan_started = FALSE;
57 self->zoom_started = FALSE;
58 self->rotate_started = FALSE;
66 g_return_if_fail(FL_IS_SCROLLING_MANAGER(
self));
72 GdkEventScroll* scroll_event,
74 g_return_if_fail(FL_IS_SCROLLING_MANAGER(
self));
76 g_autoptr(FlEngine) engine = FL_ENGINE(g_weak_ref_get(&self->engine));
77 if (engine ==
nullptr) {
81 GdkEvent*
event =
reinterpret_cast<GdkEvent*
>(scroll_event);
83 guint event_time = gdk_event_get_time(event);
84 gdouble event_x = 0.0, event_y = 0.0;
85 gdk_event_get_coords(event, &event_x, &event_y);
86 gdouble scroll_delta_x = 0.0, scroll_delta_y = 0.0;
87 GdkScrollDirection event_direction = GDK_SCROLL_SMOOTH;
88 if (gdk_event_get_scroll_direction(event, &event_direction)) {
89 if (event_direction == GDK_SCROLL_UP) {
92 }
else if (event_direction == GDK_SCROLL_DOWN) {
95 }
else if (event_direction == GDK_SCROLL_LEFT) {
98 }
else if (event_direction == GDK_SCROLL_RIGHT) {
103 gdk_event_get_scroll_deltas(event, &scroll_delta_x, &scroll_delta_y);
108 const int kScrollOffsetMultiplier = 53;
109 scroll_delta_x *= kScrollOffsetMultiplier * scale_factor;
110 scroll_delta_y *= kScrollOffsetMultiplier * scale_factor;
112 if (gdk_device_get_source(gdk_event_get_source_device(event)) ==
113 GDK_SOURCE_TOUCHPAD) {
114 scroll_delta_x *= -1;
115 scroll_delta_y *= -1;
116 if (gdk_event_is_scroll_stop_event(event)) {
119 event_x * scale_factor, event_y * scale_factor, kPanZoomEnd,
120 self->pan_x, self->pan_y, 0, 0);
121 self->pan_started = FALSE;
123 if (!self->pan_started) {
128 event_x * scale_factor, event_y * scale_factor, kPanZoomStart, 0, 0,
130 self->pan_started =
TRUE;
132 self->pan_x += scroll_delta_x;
133 self->pan_y += scroll_delta_y;
136 event_x * scale_factor, event_y * scale_factor, kPanZoomUpdate,
137 self->pan_x, self->pan_y, 1, 0);
140 self->last_x = event_x * scale_factor;
141 self->last_y = event_y * scale_factor;
143 engine, self->view_id,
144 FlutterPointerPhase::kMove
148 event_y * scale_factor, kFlutterPointerDeviceKindMouse, scroll_delta_x,
154 g_return_if_fail(FL_IS_SCROLLING_MANAGER(
self));
156 g_autoptr(FlEngine) engine = FL_ENGINE(g_weak_ref_get(&self->engine));
157 if (engine ==
nullptr) {
161 self->rotate_started =
TRUE;
162 if (!self->zoom_started) {
166 engine, self->view_id, g_get_real_time(), self->last_x, self->last_y,
167 kPanZoomStart, 0, 0, 0, 0);
173 g_return_if_fail(FL_IS_SCROLLING_MANAGER(
self));
175 g_autoptr(FlEngine) engine = FL_ENGINE(g_weak_ref_get(&self->engine));
176 if (engine ==
nullptr) {
180 self->rotation = rotation;
182 engine, self->view_id, g_get_real_time(), self->last_x, self->last_y,
183 kPanZoomUpdate, 0, 0, self->scale, self->rotation);
187 g_return_if_fail(FL_IS_SCROLLING_MANAGER(
self));
189 g_autoptr(FlEngine) engine = FL_ENGINE(g_weak_ref_get(&self->engine));
190 if (engine ==
nullptr) {
194 self->rotate_started = FALSE;
195 if (!self->zoom_started) {
197 engine, self->view_id, g_get_real_time(), self->last_x, self->last_y,
198 kPanZoomEnd, 0, 0, 0, 0);
203 g_return_if_fail(FL_IS_SCROLLING_MANAGER(
self));
205 g_autoptr(FlEngine) engine = FL_ENGINE(g_weak_ref_get(&self->engine));
206 if (engine ==
nullptr) {
210 self->zoom_started =
TRUE;
211 if (!self->rotate_started) {
215 engine, self->view_id, g_get_real_time(), self->last_x, self->last_y,
216 kPanZoomStart, 0, 0, 0, 0);
222 g_return_if_fail(FL_IS_SCROLLING_MANAGER(
self));
224 g_autoptr(FlEngine) engine = FL_ENGINE(g_weak_ref_get(&self->engine));
225 if (engine ==
nullptr) {
231 engine, self->view_id, g_get_real_time(), self->last_x, self->last_y,
232 kPanZoomUpdate, 0, 0, self->scale, self->rotation);
236 g_return_if_fail(FL_IS_SCROLLING_MANAGER(
self));
238 g_autoptr(FlEngine) engine = FL_ENGINE(g_weak_ref_get(&self->engine));
239 if (engine ==
nullptr) {
243 self->zoom_started = FALSE;
244 if (!self->rotate_started) {
246 engine, self->view_id, g_get_real_time(), self->last_x, self->last_y,
247 kPanZoomEnd, 0, 0, 0, 0);