/*************************************************************************/ /* scroll_container.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ #include "scroll_container.h" #include "core/os/os.h" #include "scene/main/window.h" bool ScrollContainer::clips_input() const { return true; } Size2 ScrollContainer::get_minimum_size() const { Ref<StyleBox> sb = get_theme_stylebox("bg"); Size2 min_size; for (int i = 0; i < get_child_count(); i++) { Control *c = Object::cast_to<Control>(get_child(i)); if (!c) { continue; } if (c->is_set_as_top_level()) { continue; } if (c == h_scroll || c == v_scroll) { continue; } Size2 minsize = c->get_combined_minimum_size(); if (!scroll_h) { min_size.x = MAX(min_size.x, minsize.x); } if (!scroll_v) { min_size.y = MAX(min_size.y, minsize.y); } } if (h_scroll->is_visible_in_tree()) { min_size.y += h_scroll->get_minimum_size().y; } if (v_scroll->is_visible_in_tree()) { min_size.x += v_scroll->get_minimum_size().x; } min_size += sb->get_minimum_size(); return min_size; } void ScrollContainer::_cancel_drag() { set_physics_process_internal(false); drag_touching_deaccel = false; drag_touching = false; drag_speed = Vector2(); drag_accum = Vector2(); last_drag_accum = Vector2(); drag_from = Vector2(); if (beyond_deadzone) { emit_signal("scroll_ended"); propagate_notification(NOTIFICATION_SCROLL_END); beyond_deadzone = false; } } void ScrollContainer::_gui_input(const Ref<InputEvent> &p_gui_input) { ERR_FAIL_COND(p_gui_input.is_null()); double prev_v_scroll = v_scroll->get_value(); double prev_h_scroll = h_scroll->get_value(); Ref<InputEventMouseButton> mb = p_gui_input; if (mb.is_valid()) { if (mb->get_button_index() == MOUSE_BUTTON_WHEEL_UP && mb->is_pressed()) { // only horizontal is enabled, scroll horizontally if (h_scroll->is_visible() && (!v_scroll->is_visible() || mb->is_shift_pressed())) { h_scroll->set_value(h_scroll->get_value() - h_scroll->get_page() / 8 * mb->get_factor()); } else if (v_scroll->is_visible_in_tree()) { v_scroll->set_value(v_scroll->get_value() - v_scroll->get_page() / 8 * mb->get_factor()); } } if (mb->get_button_index() == MOUSE_BUTTON_WHEEL_DOWN && mb->is_pressed()) { // only horizontal is enabled, scroll horizontally if (h_scroll->is_visible() && (!v_scroll->is_visible() || mb->is_shift_pressed())) { h_scroll->set_value(h_scroll->get_value() + h_scroll->get_page() / 8 * mb->get_factor()); } else if (v_scroll->is_visible()) { v_scroll->set_value(v_scroll->get_value() + v_scroll->get_page() / 8 * mb->get_factor()); } } if (mb->get_button_index() == MOUSE_BUTTON_WHEEL_LEFT && mb->is_pressed()) { if (h_scroll->is_visible_in_tree()) { h_scroll->set_value(h_scroll->get_value() - h_scroll->get_page() * mb->get_factor() / 8); } } if (mb->get_button_index() == MOUSE_BUTTON_WHEEL_RIGHT && mb->is_pressed()) { if (h_scroll->is_visible_in_tree()) { h_scroll->set_value(h_scroll->get_value() + h_scroll->get_page() * mb->get_factor() / 8); } } if (v_scroll->get_value() != prev_v_scroll || h_scroll->get_value() != prev_h_scroll) { accept_event(); //accept event if scroll changed } if (!DisplayServer::get_singleton()->screen_is_touchscreen(DisplayServer::get_singleton()->window_get_current_screen(get_viewport()->get_window_id()))) { return; } if (mb->get_button_index() != MOUSE_BUTTON_LEFT) { return; } if (mb->is_pressed()) { if (drag_touching) { _cancel_drag(); } drag_speed = Vector2(); drag_accum = Vector2(); last_drag_accum = Vector2(); drag_from = Vector2(h_scroll->get_value(), v_scroll->get_value()); drag_touching = !DisplayServer::get_singleton()->screen_is_touchscreen(DisplayServer::get_singleton()->window_get_current_screen(get_viewport()->get_window_id())); drag_touching_deaccel = false; beyond_deadzone = false; time_since_motion = 0; if (drag_touching) { set_physics_process_internal(true); time_since_motion = 0; } } else { if (drag_touching) { if (drag_speed == Vector2()) { _cancel_drag(); } else { drag_touching_deaccel = true; } } } } Ref<InputEventMouseMotion> mm = p_gui_input; if (mm.is_valid()) { if (drag_touching && !drag_touching_deaccel) { Vector2 motion = Vector2(mm->get_relative().x, mm->get_relative().y); drag_accum -= motion; if (beyond_deadzone || (scroll_h && Math::abs(drag_accum.x) > deadzone) || (scroll_v && Math::abs(drag_accum.y) > deadzone)) { if (!beyond_deadzone) { propagate_notification(NOTIFICATION_SCROLL_BEGIN); emit_signal("scroll_started"); beyond_deadzone = true; // resetting drag_accum here ensures smooth scrolling after reaching deadzone drag_accum = -motion; } Vector2 diff = drag_from + drag_accum; if (scroll_h) { h_scroll->set_value(diff.x); } else { drag_accum.x = 0; } if (scroll_v) { v_scroll->set_value(diff.y); } else { drag_accum.y = 0; } time_since_motion = 0; } } } Ref<InputEventPanGesture> pan_gesture = p_gui_input; if (pan_gesture.is_valid()) { if (h_scroll->is_visible_in_tree()) { h_scroll->set_value(h_scroll->get_value() + h_scroll->get_page() * pan_gesture->get_delta().x / 8); } if (v_scroll->is_visible_in_tree()) { v_scroll->set_value(v_scroll->get_value() + v_scroll->get_page() * pan_gesture->get_delta().y / 8); } } if (v_scroll->get_value() != prev_v_scroll || h_scroll->get_value() != prev_h_scroll) { accept_event(); //accept event if scroll changed } } void ScrollContainer::_update_scrollbar_position() { if (!_updating_scrollbars) { return; } Size2 hmin = h_scroll->get_combined_minimum_size(); Size2 vmin = v_scroll->get_combined_minimum_size(); h_scroll->set_anchor_and_offset(SIDE_LEFT, ANCHOR_BEGIN, 0); h_scroll->set_anchor_and_offset(SIDE_RIGHT, ANCHOR_END, 0); h_scroll->set_anchor_and_offset(SIDE_TOP, ANCHOR_END, -hmin.height); h_scroll->set_anchor_and_offset(SIDE_BOTTOM, ANCHOR_END, 0); v_scroll->set_anchor_and_offset(SIDE_LEFT, ANCHOR_END, -vmin.width); v_scroll->set_anchor_and_offset(SIDE_RIGHT, ANCHOR_END, 0); v_scroll->set_anchor_and_offset(SIDE_TOP, ANCHOR_BEGIN, 0); v_scroll->set_anchor_and_offset(SIDE_BOTTOM, ANCHOR_END, 0); h_scroll->raise(); v_scroll->raise(); _updating_scrollbars = false; } void ScrollContainer::_gui_focus_changed(Control *p_control) { if (follow_focus && is_a_parent_of(p_control)) { ensure_control_visible(p_control); } } void ScrollContainer::ensure_control_visible(Control *p_control) { ERR_FAIL_COND_MSG(!is_a_parent_of(p_control), "Must be a parent of the control."); Rect2 global_rect = get_global_rect(); Rect2 other_rect = p_control->get_global_rect(); float right_margin = v_scroll->is_visible() ? v_scroll->get_size().x : 0.0f; float bottom_margin = h_scroll->is_visible() ? h_scroll->get_size().y : 0.0f; Vector2 diff = Vector2(MAX(MIN(other_rect.position.x, global_rect.position.x), other_rect.position.x + other_rect.size.x - global_rect.size.x + (!is_layout_rtl() ? right_margin : 0.0f)), MAX(MIN(other_rect.position.y, global_rect.position.y), other_rect.position.y + other_rect.size.y - global_rect.size.y + bottom_margin)); set_h_scroll(get_h_scroll() + (diff.x - global_rect.position.x)); set_v_scroll(get_v_scroll() + (diff.y - global_rect.position.y)); } void ScrollContainer::_update_dimensions() { child_max_size = Size2(0, 0); Size2 size = get_size(); Point2 ofs; Ref<StyleBox> sb = get_theme_stylebox("bg"); size -= sb->get_minimum_size(); ofs += sb->get_offset(); bool rtl = is_layout_rtl(); if (h_scroll->is_visible_in_tree() && h_scroll->get_parent() == this) { //scrolls may have been moved out for reasons size.y -= h_scroll->get_minimum_size().y; } if (v_scroll->is_visible_in_tree() && v_scroll->get_parent() == this) { //scrolls may have been moved out for reasons size.x -= v_scroll->get_minimum_size().x; } for (int i = 0; i < get_child_count(); i++) { Control *c = Object::cast_to<Control>(get_child(i)); if (!c) { continue; } if (c->is_set_as_top_level()) { continue; } if (c == h_scroll || c == v_scroll) { continue; } Size2 minsize = c->get_combined_minimum_size(); child_max_size.x = MAX(child_max_size.x, minsize.x); child_max_size.y = MAX(child_max_size.y, minsize.y); Rect2 r = Rect2(-Size2(get_h_scroll(), get_v_scroll()), minsize); if (!scroll_h || (!h_scroll->is_visible_in_tree() && c->get_h_size_flags() & SIZE_EXPAND)) { r.position.x = 0; if (c->get_h_size_flags() & SIZE_EXPAND) { r.size.width = MAX(size.width, minsize.width); } else { r.size.width = minsize.width; } } if (!scroll_v || (!v_scroll->is_visible_in_tree() && c->get_v_size_flags() & SIZE_EXPAND)) { r.position.y = 0; if (c->get_v_size_flags() & SIZE_EXPAND) { r.size.height = MAX(size.height, minsize.height); } else { r.size.height = minsize.height; } } r.position += ofs; if (rtl && v_scroll->is_visible_in_tree() && v_scroll->get_parent() == this) { r.position.x += v_scroll->get_minimum_size().x; } r.position = r.position.floor(); fit_child_in_rect(c, r); } update(); } void ScrollContainer::_notification(int p_what) { if (p_what == NOTIFICATION_ENTER_TREE || p_what == NOTIFICATION_THEME_CHANGED || p_what == NOTIFICATION_LAYOUT_DIRECTION_CHANGED || p_what == NOTIFICATION_TRANSLATION_CHANGED) { _updating_scrollbars = true; call_deferred("_update_scrollbar_position"); }; if (p_what == NOTIFICATION_READY) { get_viewport()->connect("gui_focus_changed", callable_mp(this, &ScrollContainer::_gui_focus_changed)); _update_dimensions(); } if (p_what == NOTIFICATION_SORT_CHILDREN) { _update_dimensions(); }; if (p_what == NOTIFICATION_DRAW) { Ref<StyleBox> sb = get_theme_stylebox("bg"); draw_style_box(sb, Rect2(Vector2(), get_size())); update_scrollbars(); } if (p_what == NOTIFICATION_INTERNAL_PHYSICS_PROCESS) { if (drag_touching) { if (drag_touching_deaccel) { Vector2 pos = Vector2(h_scroll->get_value(), v_scroll->get_value()); pos += drag_speed * get_physics_process_delta_time(); bool turnoff_h = false; bool turnoff_v = false; if (pos.x < 0) { pos.x = 0; turnoff_h = true; } if (pos.x > (h_scroll->get_max() - h_scroll->get_page())) { pos.x = h_scroll->get_max() - h_scroll->get_page(); turnoff_h = true; } if (pos.y < 0) { pos.y = 0; turnoff_v = true; } if (pos.y > (v_scroll->get_max() - v_scroll->get_page())) { pos.y = v_scroll->get_max() - v_scroll->get_page(); turnoff_v = true; } if (scroll_h) { h_scroll->set_value(pos.x); } if (scroll_v) { v_scroll->set_value(pos.y); } float sgn_x = drag_speed.x < 0 ? -1 : 1; float val_x = Math::abs(drag_speed.x); val_x -= 1000 * get_physics_process_delta_time(); if (val_x < 0) { turnoff_h = true; } float sgn_y = drag_speed.y < 0 ? -1 : 1; float val_y = Math::abs(drag_speed.y); val_y -= 1000 * get_physics_process_delta_time(); if (val_y < 0) { turnoff_v = true; } drag_speed = Vector2(sgn_x * val_x, sgn_y * val_y); if (turnoff_h && turnoff_v) { _cancel_drag(); } } else { if (time_since_motion == 0 || time_since_motion > 0.1) { Vector2 diff = drag_accum - last_drag_accum; last_drag_accum = drag_accum; drag_speed = diff / get_physics_process_delta_time(); } time_since_motion += get_physics_process_delta_time(); } } } }; void ScrollContainer::update_scrollbars() { Size2 size = get_size(); Ref<StyleBox> sb = get_theme_stylebox("bg"); size -= sb->get_minimum_size(); Size2 hmin; Size2 vmin; if (scroll_h) { hmin = h_scroll->get_combined_minimum_size(); } if (scroll_v) { vmin = v_scroll->get_combined_minimum_size(); } Size2 min = child_max_size; bool hide_scroll_h = !scroll_h || min.width <= size.width || !h_scroll_visible; bool hide_scroll_v = !scroll_v || min.height <= size.height || !v_scroll_visible; h_scroll->set_max(min.width); h_scroll->set_page(size.width - (hide_scroll_v ? 0 : vmin.width)); h_scroll->set_visible(!hide_scroll_h); v_scroll->set_max(min.height); v_scroll->set_page(size.height - (hide_scroll_h ? 0 : hmin.height)); v_scroll->set_visible(!hide_scroll_v); // Avoid scrollbar overlapping. h_scroll->set_anchor_and_offset(SIDE_RIGHT, ANCHOR_END, hide_scroll_v ? 0 : -vmin.width); v_scroll->set_anchor_and_offset(SIDE_BOTTOM, ANCHOR_END, hide_scroll_h ? 0 : -hmin.height); } void ScrollContainer::_scroll_moved(float) { queue_sort(); update(); }; void ScrollContainer::set_h_scroll(int p_pos) { h_scroll->set_value(p_pos); _cancel_drag(); } int ScrollContainer::get_h_scroll() const { return h_scroll->get_value(); } void ScrollContainer::set_v_scroll(int p_pos) { v_scroll->set_value(p_pos); _cancel_drag(); } int ScrollContainer::get_v_scroll() const { return v_scroll->get_value(); } void ScrollContainer::set_enable_h_scroll(bool p_enable) { if (scroll_h == p_enable) { return; } scroll_h = p_enable; minimum_size_changed(); queue_sort(); } bool ScrollContainer::is_h_scroll_enabled() const { return scroll_h; } void ScrollContainer::set_enable_v_scroll(bool p_enable) { if (scroll_v == p_enable) { return; } scroll_v = p_enable; minimum_size_changed(); queue_sort(); } bool ScrollContainer::is_v_scroll_enabled() const { return scroll_v; } void ScrollContainer::set_h_scroll_visible(bool p_visible) { if (h_scroll_visible == p_visible) { return; } h_scroll_visible = p_visible; update_scrollbars(); } bool ScrollContainer::is_h_scroll_visible() const { return h_scroll_visible; } void ScrollContainer::set_v_scroll_visible(bool p_visible) { if (v_scroll_visible == p_visible) { return; } v_scroll_visible = p_visible; update_scrollbars(); } bool ScrollContainer::is_v_scroll_visible() const { return v_scroll_visible; } int ScrollContainer::get_deadzone() const { return deadzone; } void ScrollContainer::set_deadzone(int p_deadzone) { deadzone = p_deadzone; } bool ScrollContainer::is_following_focus() const { return follow_focus; } void ScrollContainer::set_follow_focus(bool p_follow) { follow_focus = p_follow; } TypedArray<String> ScrollContainer::get_configuration_warnings() const { TypedArray<String> warnings = Container::get_configuration_warnings(); int found = 0; for (int i = 0; i < get_child_count(); i++) { Control *c = Object::cast_to<Control>(get_child(i)); if (!c) { continue; } if (c->is_set_as_top_level()) { continue; } if (c == h_scroll || c == v_scroll) { continue; } found++; } if (found != 1) { warnings.push_back(TTR("ScrollContainer is intended to work with a single child control.\nUse a container as child (VBox, HBox, etc.), or a Control and set the custom minimum size manually.")); } return warnings; } HScrollBar *ScrollContainer::get_h_scrollbar() { return h_scroll; } VScrollBar *ScrollContainer::get_v_scrollbar() { return v_scroll; } void ScrollContainer::_bind_methods() { ClassDB::bind_method(D_METHOD("_gui_input"), &ScrollContainer::_gui_input); ClassDB::bind_method(D_METHOD("_update_scrollbar_position"), &ScrollContainer::_update_scrollbar_position); ClassDB::bind_method(D_METHOD("set_h_scroll", "value"), &ScrollContainer::set_h_scroll); ClassDB::bind_method(D_METHOD("get_h_scroll"), &ScrollContainer::get_h_scroll); ClassDB::bind_method(D_METHOD("set_v_scroll", "value"), &ScrollContainer::set_v_scroll); ClassDB::bind_method(D_METHOD("get_v_scroll"), &ScrollContainer::get_v_scroll); ClassDB::bind_method(D_METHOD("set_enable_h_scroll", "enable"), &ScrollContainer::set_enable_h_scroll); ClassDB::bind_method(D_METHOD("is_h_scroll_enabled"), &ScrollContainer::is_h_scroll_enabled); ClassDB::bind_method(D_METHOD("set_enable_v_scroll", "enable"), &ScrollContainer::set_enable_v_scroll); ClassDB::bind_method(D_METHOD("is_v_scroll_enabled"), &ScrollContainer::is_v_scroll_enabled); ClassDB::bind_method(D_METHOD("set_h_scroll_visible", "visible"), &ScrollContainer::set_h_scroll_visible); ClassDB::bind_method(D_METHOD("is_h_scroll_visible"), &ScrollContainer::is_h_scroll_visible); ClassDB::bind_method(D_METHOD("set_v_scroll_visible", "visible"), &ScrollContainer::set_v_scroll_visible); ClassDB::bind_method(D_METHOD("is_v_scroll_visible"), &ScrollContainer::is_v_scroll_visible); ClassDB::bind_method(D_METHOD("set_deadzone", "deadzone"), &ScrollContainer::set_deadzone); ClassDB::bind_method(D_METHOD("get_deadzone"), &ScrollContainer::get_deadzone); ClassDB::bind_method(D_METHOD("set_follow_focus", "enabled"), &ScrollContainer::set_follow_focus); ClassDB::bind_method(D_METHOD("is_following_focus"), &ScrollContainer::is_following_focus); ClassDB::bind_method(D_METHOD("get_h_scrollbar"), &ScrollContainer::get_h_scrollbar); ClassDB::bind_method(D_METHOD("get_v_scrollbar"), &ScrollContainer::get_v_scrollbar); ClassDB::bind_method(D_METHOD("ensure_control_visible", "control"), &ScrollContainer::ensure_control_visible); ADD_SIGNAL(MethodInfo("scroll_started")); ADD_SIGNAL(MethodInfo("scroll_ended")); ADD_PROPERTY(PropertyInfo(Variant::BOOL, "follow_focus"), "set_follow_focus", "is_following_focus"); ADD_GROUP("Scroll", "scroll_"); ADD_PROPERTY(PropertyInfo(Variant::INT, "scroll_horizontal"), "set_h_scroll", "get_h_scroll"); ADD_PROPERTY(PropertyInfo(Variant::INT, "scroll_vertical"), "set_v_scroll", "get_v_scroll"); ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll_horizontal_enabled"), "set_enable_h_scroll", "is_h_scroll_enabled"); ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll_vertical_enabled"), "set_enable_v_scroll", "is_v_scroll_enabled"); ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll_horizontal_visible"), "set_h_scroll_visible", "is_h_scroll_visible"); ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll_vertical_visible"), "set_v_scroll_visible", "is_v_scroll_visible"); ADD_PROPERTY(PropertyInfo(Variant::INT, "scroll_deadzone"), "set_deadzone", "get_deadzone"); GLOBAL_DEF("gui/common/default_scroll_deadzone", 0); }; ScrollContainer::ScrollContainer() { h_scroll = memnew(HScrollBar); h_scroll->set_name("_h_scroll"); add_child(h_scroll); h_scroll->connect("value_changed", callable_mp(this, &ScrollContainer::_scroll_moved)); v_scroll = memnew(VScrollBar); v_scroll->set_name("_v_scroll"); add_child(v_scroll); v_scroll->connect("value_changed", callable_mp(this, &ScrollContainer::_scroll_moved)); deadzone = GLOBAL_GET("gui/common/default_scroll_deadzone"); set_clip_contents(true); };