616 lines
18 KiB
C++
616 lines
18 KiB
C++
/*************************************************************************/
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/* scroll_container.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "scroll_container.h"
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#include "core/os/os.h"
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#include "scene/main/viewport.h"
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bool ScrollContainer::clips_input() const {
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return true;
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}
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Size2 ScrollContainer::get_minimum_size() const {
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Ref<StyleBox> sb = get_stylebox("bg");
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Size2 min_size;
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for (int i = 0; i < get_child_count(); i++) {
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Control *c = Object::cast_to<Control>(get_child(i));
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if (!c)
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continue;
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if (c->is_set_as_toplevel())
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continue;
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if (c == h_scroll || c == v_scroll)
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continue;
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Size2 minsize = c->get_combined_minimum_size();
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if (!scroll_h) {
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min_size.x = MAX(min_size.x, minsize.x);
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}
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if (!scroll_v) {
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min_size.y = MAX(min_size.y, minsize.y);
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}
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}
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if (h_scroll->is_visible_in_tree()) {
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min_size.y += h_scroll->get_minimum_size().y;
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}
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if (v_scroll->is_visible_in_tree()) {
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min_size.x += v_scroll->get_minimum_size().x;
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}
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min_size += sb->get_minimum_size();
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return min_size;
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}
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void ScrollContainer::_cancel_drag() {
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set_physics_process_internal(false);
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drag_touching_deaccel = false;
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drag_touching = false;
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drag_speed = Vector2();
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drag_accum = Vector2();
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last_drag_accum = Vector2();
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drag_from = Vector2();
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if (beyond_deadzone) {
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emit_signal("scroll_ended");
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propagate_notification(NOTIFICATION_SCROLL_END);
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beyond_deadzone = false;
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}
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}
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void ScrollContainer::_gui_input(const Ref<InputEvent> &p_gui_input) {
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double prev_v_scroll = v_scroll->get_value();
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double prev_h_scroll = h_scroll->get_value();
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Ref<InputEventMouseButton> mb = p_gui_input;
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if (mb.is_valid()) {
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if (mb->get_button_index() == BUTTON_WHEEL_UP && mb->is_pressed()) {
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// only horizontal is enabled, scroll horizontally
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if (h_scroll->is_visible() && (!v_scroll->is_visible() || mb->get_shift())) {
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h_scroll->set_value(h_scroll->get_value() - h_scroll->get_page() / 8 * mb->get_factor());
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} else if (v_scroll->is_visible_in_tree()) {
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v_scroll->set_value(v_scroll->get_value() - v_scroll->get_page() / 8 * mb->get_factor());
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}
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}
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if (mb->get_button_index() == BUTTON_WHEEL_DOWN && mb->is_pressed()) {
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// only horizontal is enabled, scroll horizontally
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if (h_scroll->is_visible() && (!v_scroll->is_visible() || mb->get_shift())) {
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h_scroll->set_value(h_scroll->get_value() + h_scroll->get_page() / 8 * mb->get_factor());
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} else if (v_scroll->is_visible()) {
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v_scroll->set_value(v_scroll->get_value() + v_scroll->get_page() / 8 * mb->get_factor());
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}
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}
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if (mb->get_button_index() == BUTTON_WHEEL_LEFT && mb->is_pressed()) {
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if (h_scroll->is_visible_in_tree()) {
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h_scroll->set_value(h_scroll->get_value() - h_scroll->get_page() * mb->get_factor() / 8);
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}
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}
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if (mb->get_button_index() == BUTTON_WHEEL_RIGHT && mb->is_pressed()) {
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if (h_scroll->is_visible_in_tree()) {
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h_scroll->set_value(h_scroll->get_value() + h_scroll->get_page() * mb->get_factor() / 8);
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}
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}
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if (v_scroll->get_value() != prev_v_scroll || h_scroll->get_value() != prev_h_scroll)
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accept_event(); //accept event if scroll changed
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if (!OS::get_singleton()->has_touchscreen_ui_hint())
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return;
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if (mb->get_button_index() != BUTTON_LEFT)
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return;
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if (mb->is_pressed()) {
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if (drag_touching) {
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_cancel_drag();
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}
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drag_speed = Vector2();
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drag_accum = Vector2();
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last_drag_accum = Vector2();
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drag_from = Vector2(h_scroll->get_value(), v_scroll->get_value());
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drag_touching = OS::get_singleton()->has_touchscreen_ui_hint();
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drag_touching_deaccel = false;
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beyond_deadzone = false;
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time_since_motion = 0;
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if (drag_touching) {
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set_physics_process_internal(true);
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time_since_motion = 0;
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}
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} else {
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if (drag_touching) {
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if (drag_speed == Vector2()) {
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_cancel_drag();
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} else {
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drag_touching_deaccel = true;
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}
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}
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}
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}
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Ref<InputEventMouseMotion> mm = p_gui_input;
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if (mm.is_valid()) {
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if (drag_touching && !drag_touching_deaccel) {
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Vector2 motion = Vector2(mm->get_relative().x, mm->get_relative().y);
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drag_accum -= motion;
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if (beyond_deadzone || (scroll_h && Math::abs(drag_accum.x) > deadzone) || (scroll_v && Math::abs(drag_accum.y) > deadzone)) {
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if (!beyond_deadzone) {
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propagate_notification(NOTIFICATION_SCROLL_BEGIN);
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emit_signal("scroll_started");
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beyond_deadzone = true;
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// resetting drag_accum here ensures smooth scrolling after reaching deadzone
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drag_accum = -motion;
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}
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Vector2 diff = drag_from + drag_accum;
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if (scroll_h)
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h_scroll->set_value(diff.x);
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else
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drag_accum.x = 0;
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if (scroll_v)
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v_scroll->set_value(diff.y);
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else
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drag_accum.y = 0;
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time_since_motion = 0;
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}
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}
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}
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Ref<InputEventPanGesture> pan_gesture = p_gui_input;
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if (pan_gesture.is_valid()) {
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if (h_scroll->is_visible_in_tree()) {
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h_scroll->set_value(h_scroll->get_value() + h_scroll->get_page() * pan_gesture->get_delta().x / 8);
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}
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if (v_scroll->is_visible_in_tree()) {
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v_scroll->set_value(v_scroll->get_value() + v_scroll->get_page() * pan_gesture->get_delta().y / 8);
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}
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}
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if (v_scroll->get_value() != prev_v_scroll || h_scroll->get_value() != prev_h_scroll)
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accept_event(); //accept event if scroll changed
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}
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void ScrollContainer::_update_scrollbar_position() {
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Size2 hmin = h_scroll->get_combined_minimum_size();
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Size2 vmin = v_scroll->get_combined_minimum_size();
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v_scroll->set_anchor_and_margin(MARGIN_LEFT, ANCHOR_END, -vmin.width);
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v_scroll->set_anchor_and_margin(MARGIN_RIGHT, ANCHOR_END, 0);
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v_scroll->set_anchor_and_margin(MARGIN_TOP, ANCHOR_BEGIN, 0);
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v_scroll->set_anchor_and_margin(MARGIN_BOTTOM, ANCHOR_END, 0);
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h_scroll->set_anchor_and_margin(MARGIN_LEFT, ANCHOR_BEGIN, 0);
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h_scroll->set_anchor_and_margin(MARGIN_RIGHT, ANCHOR_END, 0);
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h_scroll->set_anchor_and_margin(MARGIN_TOP, ANCHOR_END, -hmin.height);
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h_scroll->set_anchor_and_margin(MARGIN_BOTTOM, ANCHOR_END, 0);
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h_scroll->raise();
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v_scroll->raise();
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}
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void ScrollContainer::_ensure_focused_visible(Control *p_control) {
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if (!follow_focus) {
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return;
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}
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if (is_a_parent_of(p_control)) {
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Rect2 global_rect = get_global_rect();
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Rect2 other_rect = p_control->get_global_rect();
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float right_margin = 0;
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if (v_scroll->is_visible()) {
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right_margin += v_scroll->get_size().x;
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}
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float bottom_margin = 0;
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if (h_scroll->is_visible()) {
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bottom_margin += h_scroll->get_size().y;
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}
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float diff = MAX(MIN(other_rect.position.y, global_rect.position.y), other_rect.position.y + other_rect.size.y - global_rect.size.y + bottom_margin);
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set_v_scroll(get_v_scroll() + (diff - global_rect.position.y));
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diff = MAX(MIN(other_rect.position.x, global_rect.position.x), other_rect.position.x + other_rect.size.x - global_rect.size.x + right_margin);
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set_h_scroll(get_h_scroll() + (diff - global_rect.position.x));
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}
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}
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void ScrollContainer::_notification(int p_what) {
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if (p_what == NOTIFICATION_ENTER_TREE || p_what == NOTIFICATION_THEME_CHANGED) {
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call_deferred("_update_scrollbar_position");
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};
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if (p_what == NOTIFICATION_READY) {
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get_viewport()->connect("gui_focus_changed", this, "_ensure_focused_visible");
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}
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if (p_what == NOTIFICATION_SORT_CHILDREN) {
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child_max_size = Size2(0, 0);
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Size2 size = get_size();
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Point2 ofs;
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Ref<StyleBox> sb = get_stylebox("bg");
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size -= sb->get_minimum_size();
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ofs += sb->get_offset();
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if (h_scroll->is_visible_in_tree() && h_scroll->get_parent() == this) //scrolls may have been moved out for reasons
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size.y -= h_scroll->get_minimum_size().y;
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if (v_scroll->is_visible_in_tree() && v_scroll->get_parent() == this) //scrolls may have been moved out for reasons
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size.x -= v_scroll->get_minimum_size().x;
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for (int i = 0; i < get_child_count(); i++) {
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Control *c = Object::cast_to<Control>(get_child(i));
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if (!c)
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continue;
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if (c->is_set_as_toplevel())
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continue;
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if (c == h_scroll || c == v_scroll)
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continue;
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Size2 minsize = c->get_combined_minimum_size();
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child_max_size.x = MAX(child_max_size.x, minsize.x);
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child_max_size.y = MAX(child_max_size.y, minsize.y);
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Rect2 r = Rect2(-scroll, minsize);
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if (!scroll_h || (!h_scroll->is_visible_in_tree() && c->get_h_size_flags() & SIZE_EXPAND)) {
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r.position.x = 0;
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if (c->get_h_size_flags() & SIZE_EXPAND)
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r.size.width = MAX(size.width, minsize.width);
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else
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r.size.width = minsize.width;
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}
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if (!scroll_v || (!v_scroll->is_visible_in_tree() && c->get_v_size_flags() & SIZE_EXPAND)) {
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r.position.y = 0;
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if (c->get_v_size_flags() & SIZE_EXPAND)
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r.size.height = MAX(size.height, minsize.height);
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else
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r.size.height = minsize.height;
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}
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r.position += ofs;
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fit_child_in_rect(c, r);
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}
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update();
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};
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if (p_what == NOTIFICATION_DRAW) {
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Ref<StyleBox> sb = get_stylebox("bg");
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draw_style_box(sb, Rect2(Vector2(), get_size()));
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update_scrollbars();
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}
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if (p_what == NOTIFICATION_INTERNAL_PHYSICS_PROCESS) {
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if (drag_touching) {
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if (drag_touching_deaccel) {
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Vector2 pos = Vector2(h_scroll->get_value(), v_scroll->get_value());
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pos += drag_speed * get_physics_process_delta_time();
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bool turnoff_h = false;
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bool turnoff_v = false;
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if (pos.x < 0) {
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pos.x = 0;
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turnoff_h = true;
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}
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if (pos.x > (h_scroll->get_max() - h_scroll->get_page())) {
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pos.x = h_scroll->get_max() - h_scroll->get_page();
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turnoff_h = true;
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}
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if (pos.y < 0) {
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pos.y = 0;
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turnoff_v = true;
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}
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if (pos.y > (v_scroll->get_max() - v_scroll->get_page())) {
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pos.y = v_scroll->get_max() - v_scroll->get_page();
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turnoff_v = true;
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}
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if (scroll_h)
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h_scroll->set_value(pos.x);
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if (scroll_v)
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v_scroll->set_value(pos.y);
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float sgn_x = drag_speed.x < 0 ? -1 : 1;
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float val_x = Math::abs(drag_speed.x);
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val_x -= 1000 * get_physics_process_delta_time();
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if (val_x < 0) {
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turnoff_h = true;
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}
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float sgn_y = drag_speed.y < 0 ? -1 : 1;
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float val_y = Math::abs(drag_speed.y);
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val_y -= 1000 * get_physics_process_delta_time();
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if (val_y < 0) {
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turnoff_v = true;
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}
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drag_speed = Vector2(sgn_x * val_x, sgn_y * val_y);
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if (turnoff_h && turnoff_v) {
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_cancel_drag();
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}
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} else {
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if (time_since_motion == 0 || time_since_motion > 0.1) {
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Vector2 diff = drag_accum - last_drag_accum;
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last_drag_accum = drag_accum;
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drag_speed = diff / get_physics_process_delta_time();
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}
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time_since_motion += get_physics_process_delta_time();
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}
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}
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}
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};
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void ScrollContainer::update_scrollbars() {
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Size2 size = get_size();
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Ref<StyleBox> sb = get_stylebox("bg");
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size -= sb->get_minimum_size();
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Size2 hmin;
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Size2 vmin;
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if (scroll_h) hmin = h_scroll->get_combined_minimum_size();
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if (scroll_v) vmin = v_scroll->get_combined_minimum_size();
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Size2 min = child_max_size;
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bool hide_scroll_v = !scroll_v || min.height <= size.height - hmin.height;
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bool hide_scroll_h = !scroll_h || min.width <= size.width - vmin.width;
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if (hide_scroll_v) {
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v_scroll->hide();
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scroll.y = 0;
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} else {
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v_scroll->show();
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v_scroll->set_max(min.height);
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if (hide_scroll_h) {
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v_scroll->set_page(size.height);
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} else {
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v_scroll->set_page(size.height - hmin.height);
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}
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scroll.y = v_scroll->get_value();
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}
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if (hide_scroll_h) {
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h_scroll->hide();
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scroll.x = 0;
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} else {
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h_scroll->show();
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h_scroll->set_max(min.width);
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if (hide_scroll_v) {
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h_scroll->set_page(size.width);
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} else {
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h_scroll->set_page(size.width - vmin.width);
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}
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scroll.x = h_scroll->get_value();
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}
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}
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void ScrollContainer::_scroll_moved(float) {
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scroll.x = h_scroll->get_value();
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scroll.y = v_scroll->get_value();
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queue_sort();
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update();
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};
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void ScrollContainer::set_enable_h_scroll(bool p_enable) {
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scroll_h = p_enable;
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queue_sort();
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}
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bool ScrollContainer::is_h_scroll_enabled() const {
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return scroll_h;
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}
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void ScrollContainer::set_enable_v_scroll(bool p_enable) {
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scroll_v = p_enable;
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queue_sort();
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}
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bool ScrollContainer::is_v_scroll_enabled() const {
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return scroll_v;
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}
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int ScrollContainer::get_v_scroll() const {
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return v_scroll->get_value();
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}
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void ScrollContainer::set_v_scroll(int p_pos) {
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v_scroll->set_value(p_pos);
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_cancel_drag();
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}
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int ScrollContainer::get_h_scroll() const {
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return h_scroll->get_value();
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}
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void ScrollContainer::set_h_scroll(int p_pos) {
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|
h_scroll->set_value(p_pos);
|
|
_cancel_drag();
|
|
}
|
|
|
|
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(int p_follow) {
|
|
follow_focus = p_follow;
|
|
}
|
|
|
|
String ScrollContainer::get_configuration_warning() const {
|
|
|
|
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_toplevel())
|
|
continue;
|
|
if (c == h_scroll || c == v_scroll)
|
|
continue;
|
|
|
|
found++;
|
|
}
|
|
|
|
if (found != 1)
|
|
return 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.");
|
|
else
|
|
return "";
|
|
}
|
|
|
|
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("_scroll_moved"), &ScrollContainer::_scroll_moved);
|
|
ClassDB::bind_method(D_METHOD("_gui_input"), &ScrollContainer::_gui_input);
|
|
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("_update_scrollbar_position"), &ScrollContainer::_update_scrollbar_position);
|
|
ClassDB::bind_method(D_METHOD("_ensure_focused_visible"), &ScrollContainer::_ensure_focused_visible);
|
|
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_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);
|
|
|
|
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::BOOL, "scroll_horizontal_enabled"), "set_enable_h_scroll", "is_h_scroll_enabled");
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT, "scroll_horizontal"), "set_h_scroll", "get_h_scroll");
|
|
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll_vertical_enabled"), "set_enable_v_scroll", "is_v_scroll_enabled");
|
|
ADD_PROPERTY(PropertyInfo(Variant::INT, "scroll_vertical"), "set_v_scroll", "get_v_scroll");
|
|
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);
|
|
|
|
v_scroll = memnew(VScrollBar);
|
|
v_scroll->set_name("_v_scroll");
|
|
add_child(v_scroll);
|
|
|
|
h_scroll->connect("value_changed", this, "_scroll_moved");
|
|
v_scroll->connect("value_changed", this, "_scroll_moved");
|
|
|
|
drag_speed = Vector2();
|
|
drag_touching = false;
|
|
drag_touching_deaccel = false;
|
|
beyond_deadzone = false;
|
|
scroll_h = true;
|
|
scroll_v = true;
|
|
|
|
deadzone = GLOBAL_GET("gui/common/default_scroll_deadzone");
|
|
follow_focus = false;
|
|
|
|
set_clip_contents(true);
|
|
};
|