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686 lines
18 KiB
C++
686 lines
18 KiB
C++
/*************************************************************************/
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/* scroll_bar.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) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 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_bar.h"
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#include "core/os/keyboard.h"
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#include "core/os/os.h"
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#include "core/print_string.h"
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bool ScrollBar::focus_by_default = false;
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void ScrollBar::set_can_focus_by_default(bool p_can_focus) {
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focus_by_default = p_can_focus;
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}
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void ScrollBar::_gui_input(Ref<InputEvent> p_event) {
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Ref<InputEventMouseMotion> m = p_event;
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if (!m.is_valid() || drag.active) {
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emit_signal("scrolling");
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}
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Ref<InputEventMouseButton> b = p_event;
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if (b.is_valid()) {
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accept_event();
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if (b->get_button_index() == BUTTON_WHEEL_DOWN && b->is_pressed()) {
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set_value(get_value() + get_page() / 4.0);
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accept_event();
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}
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if (b->get_button_index() == BUTTON_WHEEL_UP && b->is_pressed()) {
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set_value(get_value() - get_page() / 4.0);
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accept_event();
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}
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if (b->get_button_index() != BUTTON_LEFT)
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return;
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if (b->is_pressed()) {
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double ofs = orientation == VERTICAL ? b->get_position().y : b->get_position().x;
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Ref<Texture> decr = get_icon("decrement");
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Ref<Texture> incr = get_icon("increment");
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double decr_size = orientation == VERTICAL ? decr->get_height() : decr->get_width();
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double incr_size = orientation == VERTICAL ? incr->get_height() : incr->get_width();
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double grabber_ofs = get_grabber_offset();
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double grabber_size = get_grabber_size();
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double total = orientation == VERTICAL ? get_size().height : get_size().width;
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if (ofs < decr_size) {
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set_value(get_value() - (custom_step >= 0 ? custom_step : get_step()));
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return;
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}
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if (ofs > total - incr_size) {
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set_value(get_value() + (custom_step >= 0 ? custom_step : get_step()));
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return;
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}
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ofs -= decr_size;
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if (ofs < grabber_ofs) {
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if (scrolling) {
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target_scroll = CLAMP(target_scroll - get_page(), get_min(), get_max() - get_page());
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} else {
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target_scroll = CLAMP(get_value() - get_page(), get_min(), get_max() - get_page());
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}
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if (smooth_scroll_enabled) {
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scrolling = true;
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set_physics_process_internal(true);
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} else {
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set_value(target_scroll);
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}
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return;
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}
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ofs -= grabber_ofs;
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if (ofs < grabber_size) {
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drag.active = true;
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drag.pos_at_click = grabber_ofs + ofs;
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drag.value_at_click = get_as_ratio();
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update();
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} else {
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if (scrolling) {
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target_scroll = CLAMP(target_scroll + get_page(), get_min(), get_max() - get_page());
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} else {
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target_scroll = CLAMP(get_value() + get_page(), get_min(), get_max() - get_page());
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}
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if (smooth_scroll_enabled) {
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scrolling = true;
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set_physics_process_internal(true);
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} else {
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set_value(target_scroll);
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}
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}
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} else {
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drag.active = false;
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update();
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}
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}
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if (m.is_valid()) {
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accept_event();
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if (drag.active) {
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double ofs = orientation == VERTICAL ? m->get_position().y : m->get_position().x;
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Ref<Texture> decr = get_icon("decrement");
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double decr_size = orientation == VERTICAL ? decr->get_height() : decr->get_width();
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ofs -= decr_size;
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double diff = (ofs - drag.pos_at_click) / get_area_size();
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set_as_ratio(drag.value_at_click + diff);
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} else {
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double ofs = orientation == VERTICAL ? m->get_position().y : m->get_position().x;
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Ref<Texture> decr = get_icon("decrement");
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Ref<Texture> incr = get_icon("increment");
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double decr_size = orientation == VERTICAL ? decr->get_height() : decr->get_width();
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double incr_size = orientation == VERTICAL ? incr->get_height() : incr->get_width();
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double total = orientation == VERTICAL ? get_size().height : get_size().width;
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HighlightStatus new_hilite;
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if (ofs < decr_size) {
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new_hilite = HIGHLIGHT_DECR;
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} else if (ofs > total - incr_size) {
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new_hilite = HIGHLIGHT_INCR;
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} else {
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new_hilite = HIGHLIGHT_RANGE;
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}
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if (new_hilite != highlight) {
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highlight = new_hilite;
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update();
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}
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}
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}
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if (p_event->is_pressed()) {
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if (p_event->is_action("ui_left")) {
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if (orientation != HORIZONTAL)
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return;
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set_value(get_value() - (custom_step >= 0 ? custom_step : get_step()));
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} else if (p_event->is_action("ui_right")) {
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if (orientation != HORIZONTAL)
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return;
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set_value(get_value() + (custom_step >= 0 ? custom_step : get_step()));
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} else if (p_event->is_action("ui_up")) {
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if (orientation != VERTICAL)
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return;
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set_value(get_value() - (custom_step >= 0 ? custom_step : get_step()));
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} else if (p_event->is_action("ui_down")) {
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if (orientation != VERTICAL)
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return;
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set_value(get_value() + (custom_step >= 0 ? custom_step : get_step()));
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} else if (p_event->is_action("ui_home")) {
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set_value(get_min());
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} else if (p_event->is_action("ui_end")) {
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set_value(get_max());
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}
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}
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}
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void ScrollBar::_notification(int p_what) {
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if (p_what == NOTIFICATION_DRAW) {
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RID ci = get_canvas_item();
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Ref<Texture> decr = highlight == HIGHLIGHT_DECR ? get_icon("decrement_highlight") : get_icon("decrement");
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Ref<Texture> incr = highlight == HIGHLIGHT_INCR ? get_icon("increment_highlight") : get_icon("increment");
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Ref<StyleBox> bg = has_focus() ? get_stylebox("scroll_focus") : get_stylebox("scroll");
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Ref<StyleBox> grabber;
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if (drag.active)
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grabber = get_stylebox("grabber_pressed");
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else if (highlight == HIGHLIGHT_RANGE)
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grabber = get_stylebox("grabber_highlight");
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else
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grabber = get_stylebox("grabber");
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Point2 ofs;
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decr->draw(ci, Point2());
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if (orientation == HORIZONTAL)
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ofs.x += decr->get_width();
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else
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ofs.y += decr->get_height();
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Size2 area = get_size();
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if (orientation == HORIZONTAL)
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area.width -= incr->get_width() + decr->get_width();
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else
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area.height -= incr->get_height() + decr->get_height();
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bg->draw(ci, Rect2(ofs, area));
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if (orientation == HORIZONTAL)
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ofs.width += area.width;
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else
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ofs.height += area.height;
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incr->draw(ci, ofs);
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Rect2 grabber_rect;
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if (orientation == HORIZONTAL) {
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grabber_rect.size.width = get_grabber_size();
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grabber_rect.size.height = get_size().height;
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grabber_rect.position.y = 0;
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grabber_rect.position.x = get_grabber_offset() + decr->get_width() + bg->get_margin(MARGIN_LEFT);
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} else {
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grabber_rect.size.width = get_size().width;
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grabber_rect.size.height = get_grabber_size();
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grabber_rect.position.y = get_grabber_offset() + decr->get_height() + bg->get_margin(MARGIN_TOP);
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grabber_rect.position.x = 0;
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}
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grabber->draw(ci, grabber_rect);
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}
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if (p_what == NOTIFICATION_ENTER_TREE) {
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if (has_node(drag_node_path)) {
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Node *n = get_node(drag_node_path);
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drag_node = Object::cast_to<Control>(n);
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}
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if (drag_node) {
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drag_node->connect("gui_input", this, "_drag_node_input");
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drag_node->connect("tree_exiting", this, "_drag_node_exit", varray(), CONNECT_ONESHOT);
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}
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}
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if (p_what == NOTIFICATION_EXIT_TREE) {
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if (drag_node) {
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drag_node->disconnect("gui_input", this, "_drag_node_input");
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drag_node->disconnect("tree_exiting", this, "_drag_node_exit");
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}
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drag_node = NULL;
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}
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if (p_what == NOTIFICATION_INTERNAL_PHYSICS_PROCESS) {
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if (scrolling) {
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if (get_value() != target_scroll) {
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double target = target_scroll - get_value();
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double dist = sqrt(target * target);
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double vel = ((target / dist) * 500) * get_physics_process_delta_time();
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if (Math::abs(vel) >= dist) {
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set_value(target_scroll);
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scrolling = false;
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set_physics_process_internal(false);
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} else {
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set_value(get_value() + vel);
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}
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} else {
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scrolling = false;
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set_physics_process_internal(false);
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}
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} else if (drag_node_touching) {
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if (drag_node_touching_deaccel) {
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Vector2 pos = Vector2(orientation == HORIZONTAL ? get_value() : 0, orientation == VERTICAL ? get_value() : 0);
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pos += drag_node_speed * get_physics_process_delta_time();
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bool turnoff = false;
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if (orientation == HORIZONTAL) {
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if (pos.x < 0) {
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pos.x = 0;
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turnoff = true;
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}
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if (pos.x > (get_max() - get_page())) {
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pos.x = get_max() - get_page();
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turnoff = true;
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}
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set_value(pos.x);
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float sgn_x = drag_node_speed.x < 0 ? -1 : 1;
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float val_x = Math::abs(drag_node_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 = true;
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}
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drag_node_speed.x = sgn_x * val_x;
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} else {
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if (pos.y < 0) {
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pos.y = 0;
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turnoff = true;
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}
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if (pos.y > (get_max() - get_page())) {
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pos.y = get_max() - get_page();
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turnoff = true;
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}
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set_value(pos.y);
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float sgn_y = drag_node_speed.y < 0 ? -1 : 1;
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float val_y = Math::abs(drag_node_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 = true;
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}
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drag_node_speed.y = sgn_y * val_y;
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}
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if (turnoff) {
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set_physics_process_internal(false);
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drag_node_touching = false;
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drag_node_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_node_accum - last_drag_node_accum;
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last_drag_node_accum = drag_node_accum;
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drag_node_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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if (p_what == NOTIFICATION_MOUSE_EXIT) {
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highlight = HIGHLIGHT_NONE;
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update();
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}
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}
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double ScrollBar::get_grabber_min_size() const {
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Ref<StyleBox> grabber = get_stylebox("grabber");
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Size2 gminsize = grabber->get_minimum_size() + grabber->get_center_size();
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return (orientation == VERTICAL) ? gminsize.height : gminsize.width;
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}
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double ScrollBar::get_grabber_size() const {
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float range = get_max() - get_min();
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if (range <= 0)
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return 0;
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float page = (get_page() > 0) ? get_page() : 0;
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/*
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if (grabber_range < get_step())
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grabber_range=get_step();
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*/
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double area_size = get_area_size();
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double grabber_size = page / range * area_size;
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return grabber_size + get_grabber_min_size();
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}
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double ScrollBar::get_area_size() const {
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switch (orientation) {
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case VERTICAL: {
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double area = get_size().height;
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area -= get_stylebox("scroll")->get_minimum_size().height;
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area -= get_icon("increment")->get_height();
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area -= get_icon("decrement")->get_height();
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area -= get_grabber_min_size();
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return area;
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} break;
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case HORIZONTAL: {
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double area = get_size().width;
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area -= get_stylebox("scroll")->get_minimum_size().width;
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area -= get_icon("increment")->get_width();
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area -= get_icon("decrement")->get_width();
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area -= get_grabber_min_size();
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return area;
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} break;
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default: {
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return 0.0;
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}
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}
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}
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double ScrollBar::get_area_offset() const {
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double ofs = 0;
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if (orientation == VERTICAL) {
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ofs += get_stylebox("hscroll")->get_margin(MARGIN_TOP);
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ofs += get_icon("decrement")->get_height();
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}
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if (orientation == HORIZONTAL) {
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ofs += get_stylebox("hscroll")->get_margin(MARGIN_LEFT);
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ofs += get_icon("decrement")->get_width();
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}
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return ofs;
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}
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double ScrollBar::get_click_pos(const Point2 &p_pos) const {
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float pos = (orientation == VERTICAL) ? p_pos.y : p_pos.x;
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pos -= get_area_offset();
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float area = get_area_size();
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if (area == 0)
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return 0;
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else
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return pos / area;
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}
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double ScrollBar::get_grabber_offset() const {
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return (get_area_size()) * get_as_ratio();
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}
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Size2 ScrollBar::get_minimum_size() const {
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Ref<Texture> incr = get_icon("increment");
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Ref<Texture> decr = get_icon("decrement");
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Ref<StyleBox> bg = get_stylebox("scroll");
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Size2 minsize;
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if (orientation == VERTICAL) {
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minsize.width = MAX(incr->get_size().width, (bg->get_minimum_size() + bg->get_center_size()).width);
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minsize.height += incr->get_size().height;
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minsize.height += decr->get_size().height;
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minsize.height += bg->get_minimum_size().height;
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minsize.height += get_grabber_min_size();
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}
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if (orientation == HORIZONTAL) {
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minsize.height = MAX(incr->get_size().height, (bg->get_center_size() + bg->get_minimum_size()).height);
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minsize.width += incr->get_size().width;
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minsize.width += decr->get_size().width;
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minsize.width += bg->get_minimum_size().width;
|
|
minsize.width += get_grabber_min_size();
|
|
}
|
|
|
|
return minsize;
|
|
}
|
|
|
|
void ScrollBar::set_custom_step(float p_custom_step) {
|
|
|
|
custom_step = p_custom_step;
|
|
}
|
|
|
|
float ScrollBar::get_custom_step() const {
|
|
|
|
return custom_step;
|
|
}
|
|
|
|
void ScrollBar::_drag_node_exit() {
|
|
|
|
if (drag_node) {
|
|
drag_node->disconnect("gui_input", this, "_drag_node_input");
|
|
}
|
|
drag_node = NULL;
|
|
}
|
|
|
|
void ScrollBar::_drag_node_input(const Ref<InputEvent> &p_input) {
|
|
|
|
Ref<InputEventMouseButton> mb = p_input;
|
|
|
|
if (mb.is_valid()) {
|
|
|
|
if (mb->get_button_index() != 1)
|
|
return;
|
|
|
|
if (mb->is_pressed()) {
|
|
|
|
drag_node_speed = Vector2();
|
|
drag_node_accum = Vector2();
|
|
last_drag_node_accum = Vector2();
|
|
drag_node_from = Vector2(orientation == HORIZONTAL ? get_value() : 0, orientation == VERTICAL ? get_value() : 0);
|
|
|
|
drag_node_touching = OS::get_singleton()->has_touchscreen_ui_hint();
|
|
drag_node_touching_deaccel = false;
|
|
time_since_motion = 0;
|
|
|
|
if (drag_node_touching) {
|
|
set_physics_process_internal(true);
|
|
time_since_motion = 0;
|
|
}
|
|
|
|
} else {
|
|
|
|
if (drag_node_touching) {
|
|
|
|
if (drag_node_speed == Vector2()) {
|
|
drag_node_touching_deaccel = false;
|
|
drag_node_touching = false;
|
|
set_physics_process_internal(false);
|
|
} else {
|
|
drag_node_touching_deaccel = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
Ref<InputEventMouseMotion> mm = p_input;
|
|
|
|
if (mm.is_valid()) {
|
|
|
|
if (drag_node_touching && !drag_node_touching_deaccel) {
|
|
|
|
Vector2 motion = Vector2(mm->get_relative().x, mm->get_relative().y);
|
|
|
|
drag_node_accum -= motion;
|
|
Vector2 diff = drag_node_from + drag_node_accum;
|
|
|
|
if (orientation == HORIZONTAL)
|
|
set_value(diff.x);
|
|
|
|
if (orientation == VERTICAL)
|
|
set_value(diff.y);
|
|
|
|
time_since_motion = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
void ScrollBar::set_drag_node(const NodePath &p_path) {
|
|
|
|
if (is_inside_tree()) {
|
|
|
|
if (drag_node) {
|
|
drag_node->disconnect("gui_input", this, "_drag_node_input");
|
|
drag_node->disconnect("tree_exiting", this, "_drag_node_exit");
|
|
}
|
|
}
|
|
|
|
drag_node = NULL;
|
|
drag_node_path = p_path;
|
|
|
|
if (is_inside_tree()) {
|
|
|
|
if (has_node(p_path)) {
|
|
Node *n = get_node(p_path);
|
|
drag_node = Object::cast_to<Control>(n);
|
|
}
|
|
|
|
if (drag_node) {
|
|
drag_node->connect("gui_input", this, "_drag_node_input");
|
|
drag_node->connect("tree_exiting", this, "_drag_node_exit", varray(), CONNECT_ONESHOT);
|
|
}
|
|
}
|
|
}
|
|
|
|
NodePath ScrollBar::get_drag_node() const {
|
|
|
|
return drag_node_path;
|
|
}
|
|
|
|
void ScrollBar::set_smooth_scroll_enabled(bool p_enable) {
|
|
smooth_scroll_enabled = p_enable;
|
|
}
|
|
|
|
bool ScrollBar::is_smooth_scroll_enabled() const {
|
|
return smooth_scroll_enabled;
|
|
}
|
|
|
|
void ScrollBar::_bind_methods() {
|
|
|
|
ClassDB::bind_method(D_METHOD("_gui_input"), &ScrollBar::_gui_input);
|
|
ClassDB::bind_method(D_METHOD("set_custom_step", "step"), &ScrollBar::set_custom_step);
|
|
ClassDB::bind_method(D_METHOD("get_custom_step"), &ScrollBar::get_custom_step);
|
|
ClassDB::bind_method(D_METHOD("_drag_node_input"), &ScrollBar::_drag_node_input);
|
|
ClassDB::bind_method(D_METHOD("_drag_node_exit"), &ScrollBar::_drag_node_exit);
|
|
|
|
ADD_SIGNAL(MethodInfo("scrolling"));
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL, "custom_step", PROPERTY_HINT_RANGE, "-1,4096"), "set_custom_step", "get_custom_step");
|
|
}
|
|
|
|
ScrollBar::ScrollBar(Orientation p_orientation) {
|
|
|
|
orientation = p_orientation;
|
|
highlight = HIGHLIGHT_NONE;
|
|
custom_step = -1;
|
|
drag_node = NULL;
|
|
|
|
drag.active = false;
|
|
|
|
drag_node_speed = Vector2();
|
|
drag_node_touching = false;
|
|
drag_node_touching_deaccel = false;
|
|
|
|
scrolling = false;
|
|
target_scroll = 0;
|
|
smooth_scroll_enabled = false;
|
|
|
|
if (focus_by_default)
|
|
set_focus_mode(FOCUS_ALL);
|
|
set_step(0);
|
|
}
|
|
|
|
ScrollBar::~ScrollBar() {
|
|
}
|