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virtualx-engine/scene/gui/slider.cpp
Rémi Verschelde d95794ec8a
One Copyright Update to rule them all 
As many open source projects have started doing it, we're removing the
current year from the copyright notice, so that we don't need to bump
it every year.

It seems like only the first year of publication is technically
relevant for copyright notices, and even that seems to be something
that many companies stopped listing altogether (in a version controlled
codebase, the commits are a much better source of date of publication
than a hardcoded copyright statement).

We also now list Godot Engine contributors first as we're collectively
the current maintainers of the project, and we clarify that the
"exclusive" copyright of the co-founders covers the timespan before
opensourcing (their further contributions are included as part of Godot
Engine contributors).

Also fixed "cf." Frenchism - it's meant as "refer to / see".
2023-01-05 13:25:55 +01:00

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/**************************************************************************/
/* slider.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#include "slider.h"
#include "core/os/keyboard.h"
Size2 Slider::get_minimum_size() const {
Size2i ss = theme_cache.slider_style->get_minimum_size() + theme_cache.slider_style->get_center_size();
Size2i rs = theme_cache.grabber_icon->get_size();
if (orientation == HORIZONTAL) {
return Size2i(ss.width, MAX(ss.height, rs.height));
} else {
return Size2i(MAX(ss.width, rs.width), ss.height);
}
}
void Slider::gui_input(const Ref<InputEvent> &p_event) {
ERR_FAIL_COND(p_event.is_null());
if (!editable) {
return;
}
Ref<InputEventMouseButton> mb = p_event;
if (mb.is_valid()) {
if (mb->get_button_index() == MouseButton::LEFT) {
if (mb->is_pressed()) {
Ref<Texture2D> grabber;
if (mouse_inside || has_focus()) {
grabber = theme_cache.grabber_hl_icon;
} else {
grabber = theme_cache.grabber_icon;
}
grab.pos = orientation == VERTICAL ? mb->get_position().y : mb->get_position().x;
double grab_width = (double)grabber->get_size().width;
double grab_height = (double)grabber->get_size().height;
double max = orientation == VERTICAL ? get_size().height - grab_height : get_size().width - grab_width;
if (orientation == VERTICAL) {
set_as_ratio(1 - (((double)grab.pos - (grab_height / 2.0)) / max));
} else {
set_as_ratio(((double)grab.pos - (grab_width / 2.0)) / max);
}
grab.active = true;
grab.uvalue = get_as_ratio();
emit_signal(SNAME("drag_started"));
} else {
grab.active = false;
const bool value_changed = !Math::is_equal_approx((double)grab.uvalue, get_as_ratio());
emit_signal(SNAME("drag_ended"), value_changed);
}
} else if (scrollable) {
if (mb->is_pressed() && mb->get_button_index() == MouseButton::WHEEL_UP) {
grab_focus();
set_value(get_value() + get_step());
} else if (mb->is_pressed() && mb->get_button_index() == MouseButton::WHEEL_DOWN) {
grab_focus();
set_value(get_value() - get_step());
}
}
}
Ref<InputEventMouseMotion> mm = p_event;
if (mm.is_valid()) {
if (grab.active) {
Size2i size = get_size();
Ref<Texture2D> grabber = theme_cache.grabber_icon;
double motion = (orientation == VERTICAL ? mm->get_position().y : mm->get_position().x) - grab.pos;
if (orientation == VERTICAL) {
motion = -motion;
}
double areasize = orientation == VERTICAL ? size.height - grabber->get_size().height : size.width - grabber->get_size().width;
if (areasize <= 0) {
return;
}
double umotion = motion / double(areasize);
set_as_ratio(grab.uvalue + umotion);
}
}
if (!mm.is_valid() && !mb.is_valid()) {
if (p_event->is_action_pressed("ui_left", true)) {
if (orientation != HORIZONTAL) {
return;
}
set_value(get_value() - (custom_step >= 0 ? custom_step : get_step()));
accept_event();
} else if (p_event->is_action_pressed("ui_right", true)) {
if (orientation != HORIZONTAL) {
return;
}
set_value(get_value() + (custom_step >= 0 ? custom_step : get_step()));
accept_event();
} else if (p_event->is_action_pressed("ui_up", true)) {
if (orientation != VERTICAL) {
return;
}
set_value(get_value() + (custom_step >= 0 ? custom_step : get_step()));
accept_event();
} else if (p_event->is_action_pressed("ui_down", true)) {
if (orientation != VERTICAL) {
return;
}
set_value(get_value() - (custom_step >= 0 ? custom_step : get_step()));
accept_event();
} else if (p_event->is_action("ui_home", true) && p_event->is_pressed()) {
set_value(get_min());
accept_event();
} else if (p_event->is_action("ui_end", true) && p_event->is_pressed()) {
set_value(get_max());
accept_event();
}
}
}
void Slider::_update_theme_item_cache() {
Range::_update_theme_item_cache();
theme_cache.slider_style = get_theme_stylebox(SNAME("slider"));
theme_cache.grabber_area_style = get_theme_stylebox(SNAME("grabber_area"));
theme_cache.grabber_area_hl_style = get_theme_stylebox(SNAME("grabber_area_highlight"));
theme_cache.grabber_icon = get_theme_icon(SNAME("grabber"));
theme_cache.grabber_hl_icon = get_theme_icon(SNAME("grabber_highlight"));
theme_cache.grabber_disabled_icon = get_theme_icon(SNAME("grabber_disabled"));
theme_cache.tick_icon = get_theme_icon(SNAME("tick"));
}
void Slider::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_THEME_CHANGED: {
update_minimum_size();
queue_redraw();
} break;
case NOTIFICATION_MOUSE_ENTER: {
mouse_inside = true;
queue_redraw();
} break;
case NOTIFICATION_MOUSE_EXIT: {
mouse_inside = false;
queue_redraw();
} break;
case NOTIFICATION_VISIBILITY_CHANGED:
case NOTIFICATION_EXIT_TREE: {
mouse_inside = false;
grab.active = false;
} break;
case NOTIFICATION_DRAW: {
RID ci = get_canvas_item();
Size2i size = get_size();
double ratio = Math::is_nan(get_as_ratio()) ? 0 : get_as_ratio();
Ref<StyleBox> style = theme_cache.slider_style;
Ref<Texture2D> tick = theme_cache.tick_icon;
bool highlighted = mouse_inside || has_focus();
Ref<Texture2D> grabber;
if (editable) {
if (highlighted) {
grabber = theme_cache.grabber_hl_icon;
} else {
grabber = theme_cache.grabber_icon;
}
} else {
grabber = theme_cache.grabber_disabled_icon;
}
Ref<StyleBox> grabber_area;
if (highlighted) {
grabber_area = theme_cache.grabber_area_hl_style;
} else {
grabber_area = theme_cache.grabber_area_style;
}
if (orientation == VERTICAL) {
int widget_width = style->get_minimum_size().width + style->get_center_size().width;
double areasize = size.height - grabber->get_size().height;
style->draw(ci, Rect2i(Point2i(size.width / 2 - widget_width / 2, 0), Size2i(widget_width, size.height)));
grabber_area->draw(ci, Rect2i(Point2i((size.width - widget_width) / 2, size.height - areasize * ratio - grabber->get_size().height / 2), Size2i(widget_width, areasize * ratio + grabber->get_size().height / 2)));
if (ticks > 1) {
int grabber_offset = (grabber->get_size().height / 2 - tick->get_height() / 2);
for (int i = 0; i < ticks; i++) {
if (!ticks_on_borders && (i == 0 || i + 1 == ticks)) {
continue;
}
int ofs = (i * areasize / (ticks - 1)) + grabber_offset;
tick->draw(ci, Point2i((size.width - widget_width) / 2, ofs));
}
}
grabber->draw(ci, Point2i(size.width / 2 - grabber->get_size().width / 2 + get_theme_constant(SNAME("grabber_offset")), size.height - ratio * areasize - grabber->get_size().height));
} else {
int widget_height = style->get_minimum_size().height + style->get_center_size().height;
double areasize = size.width - grabber->get_size().width;
style->draw(ci, Rect2i(Point2i(0, (size.height - widget_height) / 2), Size2i(size.width, widget_height)));
grabber_area->draw(ci, Rect2i(Point2i(0, (size.height - widget_height) / 2), Size2i(areasize * ratio + grabber->get_size().width / 2, widget_height)));
if (ticks > 1) {
int grabber_offset = (grabber->get_size().width / 2 - tick->get_width() / 2);
for (int i = 0; i < ticks; i++) {
if ((!ticks_on_borders) && ((i == 0) || ((i + 1) == ticks))) {
continue;
}
int ofs = (i * areasize / (ticks - 1)) + grabber_offset;
tick->draw(ci, Point2i(ofs, (size.height - widget_height) / 2));
}
}
grabber->draw(ci, Point2i(ratio * areasize, size.height / 2 - grabber->get_size().height / 2 + get_theme_constant(SNAME("grabber_offset"))));
}
} break;
}
}
void Slider::set_custom_step(double p_custom_step) {
custom_step = p_custom_step;
}
double Slider::get_custom_step() const {
return custom_step;
}
void Slider::set_ticks(int p_count) {
if (ticks == p_count) {
return;
}
ticks = p_count;
queue_redraw();
}
int Slider::get_ticks() const {
return ticks;
}
bool Slider::get_ticks_on_borders() const {
return ticks_on_borders;
}
void Slider::set_ticks_on_borders(bool _tob) {
if (ticks_on_borders == _tob) {
return;
}
ticks_on_borders = _tob;
queue_redraw();
}
void Slider::set_editable(bool p_editable) {
if (editable == p_editable) {
return;
}
editable = p_editable;
queue_redraw();
}
bool Slider::is_editable() const {
return editable;
}
void Slider::set_scrollable(bool p_scrollable) {
scrollable = p_scrollable;
}
bool Slider::is_scrollable() const {
return scrollable;
}
void Slider::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_ticks", "count"), &Slider::set_ticks);
ClassDB::bind_method(D_METHOD("get_ticks"), &Slider::get_ticks);
ClassDB::bind_method(D_METHOD("get_ticks_on_borders"), &Slider::get_ticks_on_borders);
ClassDB::bind_method(D_METHOD("set_ticks_on_borders", "ticks_on_border"), &Slider::set_ticks_on_borders);
ClassDB::bind_method(D_METHOD("set_editable", "editable"), &Slider::set_editable);
ClassDB::bind_method(D_METHOD("is_editable"), &Slider::is_editable);
ClassDB::bind_method(D_METHOD("set_scrollable", "scrollable"), &Slider::set_scrollable);
ClassDB::bind_method(D_METHOD("is_scrollable"), &Slider::is_scrollable);
ADD_SIGNAL(MethodInfo("drag_started"));
ADD_SIGNAL(MethodInfo("drag_ended", PropertyInfo(Variant::BOOL, "value_changed")));
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "editable"), "set_editable", "is_editable");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scrollable"), "set_scrollable", "is_scrollable");
ADD_PROPERTY(PropertyInfo(Variant::INT, "tick_count", PROPERTY_HINT_RANGE, "0,4096,1"), "set_ticks", "get_ticks");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "ticks_on_borders"), "set_ticks_on_borders", "get_ticks_on_borders");
}
Slider::Slider(Orientation p_orientation) {
orientation = p_orientation;
set_focus_mode(FOCUS_ALL);
}
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