450 lines
13 KiB
C++
450 lines
13 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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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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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 "os/os.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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Size2 min_size;
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for (int i = 0; i < get_child_count(); i++) {
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Control *c = get_child(i)->cast_to<Control>();
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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()) {
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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()) {
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min_size.x += v_scroll->get_minimum_size().x;
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}
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return min_size;
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};
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void ScrollContainer::_cancel_drag() {
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set_fixed_process(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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}
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void ScrollContainer::_input_event(const InputEvent &p_input_event) {
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switch (p_input_event.type) {
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case InputEvent::MOUSE_BUTTON: {
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const InputEventMouseButton &mb = p_input_event.mouse_button;
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if (mb.button_index == BUTTON_WHEEL_UP && mb.pressed) {
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if (h_scroll->is_visible() && !v_scroll->is_visible()) {
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// only horizontal is enabled, scroll horizontally
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h_scroll->set_val(h_scroll->get_val() - h_scroll->get_page() / 8);
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} else if (v_scroll->is_visible()) {
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v_scroll->set_val(v_scroll->get_val() - v_scroll->get_page() / 8);
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}
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}
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if (mb.button_index == BUTTON_WHEEL_DOWN && mb.pressed) {
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if (h_scroll->is_visible() && !v_scroll->is_visible()) {
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// only horizontal is enabled, scroll horizontally
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h_scroll->set_val(h_scroll->get_val() + h_scroll->get_page() / 8);
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} else if (v_scroll->is_visible()) {
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v_scroll->set_val(v_scroll->get_val() + v_scroll->get_page() / 8);
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}
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}
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if (!OS::get_singleton()->has_touchscreen_ui_hint())
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return;
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if (mb.button_index != BUTTON_LEFT)
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break;
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if (mb.pressed) {
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if (drag_touching) {
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set_fixed_process(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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}
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if (true) {
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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_val(), v_scroll->get_val());
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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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time_since_motion = 0;
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if (drag_touching) {
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set_fixed_process(true);
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time_since_motion = 0;
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}
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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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drag_touching_deaccel = false;
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drag_touching = false;
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set_fixed_process(false);
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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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} break;
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case InputEvent::MOUSE_MOTION: {
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const InputEventMouseMotion &mm = p_input_event.mouse_motion;
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if (drag_touching && !drag_touching_deaccel) {
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Vector2 motion = Vector2(mm.relative_x, mm.relative_y);
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drag_accum -= motion;
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Vector2 diff = drag_from + drag_accum;
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if (scroll_h)
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h_scroll->set_val(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_val(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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} break;
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}
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}
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void ScrollContainer::_update_scrollbar_pos() {
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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::_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_pos");
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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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if (h_scroll->is_visible())
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size.y -= h_scroll->get_minimum_size().y;
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if (v_scroll->is_visible())
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size.x -= h_scroll->get_minimum_size().x;
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for (int i = 0; i < get_child_count(); i++) {
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Control *c = get_child(i)->cast_to<Control>();
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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() && c->get_h_size_flags() & SIZE_EXPAND)) {
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r.pos.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() && c->get_v_size_flags() & SIZE_EXPAND)) {
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r.pos.y = 0;
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r.size.height = size.height;
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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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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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update_scrollbars();
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VisualServer::get_singleton()->canvas_item_set_clip(get_canvas_item(), true);
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}
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if (p_what == NOTIFICATION_FIXED_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_val(), v_scroll->get_val());
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pos += drag_speed * get_fixed_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_val(pos.x);
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if (scroll_v)
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v_scroll->set_val(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_fixed_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_fixed_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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set_fixed_process(false);
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drag_touching = false;
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drag_touching_deaccel = false;
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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_fixed_process_delta_time();
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}
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time_since_motion += get_fixed_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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Size2 hmin = h_scroll->get_combined_minimum_size();
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Size2 vmin = v_scroll->get_combined_minimum_size();
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Size2 min = child_max_size;
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if (!scroll_v || min.height <= size.height - hmin.height) {
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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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scroll.y = v_scroll->get_val();
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}
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v_scroll->set_max(min.height);
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v_scroll->set_page(size.height - hmin.height);
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if (!scroll_h || min.width <= size.width - vmin.width) {
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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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h_scroll->set_page(size.width - vmin.width);
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scroll.x = h_scroll->get_val();
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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_val();
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scroll.y = v_scroll->get_val();
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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_val();
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}
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void ScrollContainer::set_v_scroll(int p_pos) {
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v_scroll->set_val(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_val();
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}
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void ScrollContainer::set_h_scroll(int p_pos) {
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h_scroll->set_val(p_pos);
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_cancel_drag();
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}
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void ScrollContainer::_bind_methods() {
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ObjectTypeDB::bind_method(_MD("_scroll_moved"), &ScrollContainer::_scroll_moved);
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ObjectTypeDB::bind_method(_MD("_input_event"), &ScrollContainer::_input_event);
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ObjectTypeDB::bind_method(_MD("set_enable_h_scroll", "enable"), &ScrollContainer::set_enable_h_scroll);
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ObjectTypeDB::bind_method(_MD("is_h_scroll_enabled"), &ScrollContainer::is_h_scroll_enabled);
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ObjectTypeDB::bind_method(_MD("set_enable_v_scroll", "enable"), &ScrollContainer::set_enable_v_scroll);
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ObjectTypeDB::bind_method(_MD("is_v_scroll_enabled"), &ScrollContainer::is_v_scroll_enabled);
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ObjectTypeDB::bind_method(_MD("_update_scrollbar_pos"), &ScrollContainer::_update_scrollbar_pos);
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ObjectTypeDB::bind_method(_MD("set_h_scroll", "val"), &ScrollContainer::set_h_scroll);
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ObjectTypeDB::bind_method(_MD("get_h_scroll"), &ScrollContainer::get_h_scroll);
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ObjectTypeDB::bind_method(_MD("set_v_scroll", "val"), &ScrollContainer::set_v_scroll);
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ObjectTypeDB::bind_method(_MD("get_v_scroll"), &ScrollContainer::get_v_scroll);
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll/horizontal"), _SCS("set_enable_h_scroll"), _SCS("is_h_scroll_enabled"));
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ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll/vertical"), _SCS("set_enable_v_scroll"), _SCS("is_v_scroll_enabled"));
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};
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ScrollContainer::ScrollContainer() {
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h_scroll = memnew(HScrollBar);
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h_scroll->set_name("_h_scroll");
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add_child(h_scroll);
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v_scroll = memnew(VScrollBar);
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v_scroll->set_name("_v_scroll");
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add_child(v_scroll);
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h_scroll->connect("value_changed", this, "_scroll_moved");
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v_scroll->connect("value_changed", this, "_scroll_moved");
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drag_speed = Vector2();
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drag_touching = false;
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drag_touching_deaccel = false;
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scroll_h = true;
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scroll_v = true;
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};
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