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d95794ec8a
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".
206 lines
9.1 KiB
C++
206 lines
9.1 KiB
C++
/**************************************************************************/
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/* editor_zoom_widget.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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 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 "editor_zoom_widget.h"
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#include "core/os/keyboard.h"
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#include "editor/editor_scale.h"
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#include "editor/editor_settings.h"
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void EditorZoomWidget::_update_zoom_label() {
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String zoom_text;
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// The zoom level displayed is relative to the editor scale
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// (like in most image editors). Its lower bound is clamped to 1 as some people
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// lower the editor scale to increase the available real estate,
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// even if their display doesn't have a particularly low DPI.
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if (zoom >= 10) {
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// Don't show a decimal when the zoom level is higher than 1000 %.
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zoom_text = TS->format_number(rtos(Math::round((zoom / MAX(1, EDSCALE)) * 100))) + " " + TS->percent_sign();
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} else {
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zoom_text = TS->format_number(rtos(Math::snapped((zoom / MAX(1, EDSCALE)) * 100, 0.1))) + " " + TS->percent_sign();
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}
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zoom_reset->set_text(zoom_text);
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}
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void EditorZoomWidget::_button_zoom_minus() {
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set_zoom_by_increments(-6, Input::get_singleton()->is_key_pressed(Key::ALT));
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emit_signal(SNAME("zoom_changed"), zoom);
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}
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void EditorZoomWidget::_button_zoom_reset() {
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set_zoom(1.0 * MAX(1, EDSCALE));
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emit_signal(SNAME("zoom_changed"), zoom);
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}
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void EditorZoomWidget::_button_zoom_plus() {
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set_zoom_by_increments(6, Input::get_singleton()->is_key_pressed(Key::ALT));
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emit_signal(SNAME("zoom_changed"), zoom);
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}
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float EditorZoomWidget::get_zoom() {
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return zoom;
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}
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void EditorZoomWidget::set_zoom(float p_zoom) {
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if (p_zoom > 0 && p_zoom != zoom) {
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zoom = p_zoom;
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_update_zoom_label();
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}
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}
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void EditorZoomWidget::set_zoom_by_increments(int p_increment_count, bool p_integer_only) {
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// Remove editor scale from the index computation.
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const float zoom_noscale = zoom / MAX(1, EDSCALE);
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if (p_integer_only) {
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// Only visit integer scaling factors above 100%, and fractions with an integer denominator below 100%
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// (1/2 = 50%, 1/3 = 33.33%, 1/4 = 25%, …).
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// This is useful when working on pixel art projects to avoid distortion.
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// This algorithm is designed to handle fractional start zoom values correctly
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// (e.g. 190% will zoom up to 200% and down to 100%).
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if (zoom_noscale + p_increment_count * 0.001 >= 1.0 - CMP_EPSILON) {
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// New zoom is certain to be above 100%.
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if (p_increment_count >= 1) {
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// Zooming.
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set_zoom(Math::floor(zoom_noscale + p_increment_count) * MAX(1, EDSCALE));
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} else {
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// Dezooming.
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set_zoom(Math::ceil(zoom_noscale + p_increment_count) * MAX(1, EDSCALE));
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}
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} else {
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if (p_increment_count >= 1) {
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// Zooming. Convert the current zoom into a denominator.
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float new_zoom = 1.0 / Math::ceil(1.0 / zoom_noscale - p_increment_count);
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if (Math::is_equal_approx(zoom_noscale, new_zoom)) {
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// New zoom is identical to the old zoom, so try again.
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// This can happen due to floating-point precision issues.
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new_zoom = 1.0 / Math::ceil(1.0 / zoom_noscale - p_increment_count - 1);
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}
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set_zoom(new_zoom * MAX(1, EDSCALE));
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} else {
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// Dezooming. Convert the current zoom into a denominator.
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float new_zoom = 1.0 / Math::floor(1.0 / zoom_noscale - p_increment_count);
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if (Math::is_equal_approx(zoom_noscale, new_zoom)) {
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// New zoom is identical to the old zoom, so try again.
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// This can happen due to floating-point precision issues.
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new_zoom = 1.0 / Math::floor(1.0 / zoom_noscale - p_increment_count + 1);
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}
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set_zoom(new_zoom * MAX(1, EDSCALE));
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}
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}
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} else {
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// Base increment factor defined as the twelveth root of two.
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// This allow a smooth geometric evolution of the zoom, with the advantage of
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// visiting all integer power of two scale factors.
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// note: this is analogous to the 'semitones' interval in the music world
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// In order to avoid numerical imprecisions, we compute and edit a zoom index
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// with the following relation: zoom = 2 ^ (index / 12)
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if (zoom < CMP_EPSILON || p_increment_count == 0) {
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return;
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}
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// zoom = 2**(index/12) => log2(zoom) = index/12
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float closest_zoom_index = Math::round(Math::log(zoom_noscale) * 12.f / Math::log(2.f));
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float new_zoom_index = closest_zoom_index + p_increment_count;
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float new_zoom = Math::pow(2.f, new_zoom_index / 12.f);
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// Restore Editor scale transformation
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new_zoom *= MAX(1, EDSCALE);
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set_zoom(new_zoom);
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}
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}
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void EditorZoomWidget::_notification(int p_what) {
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switch (p_what) {
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case NOTIFICATION_ENTER_TREE:
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case NOTIFICATION_THEME_CHANGED: {
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zoom_minus->set_icon(get_theme_icon(SNAME("ZoomLess"), SNAME("EditorIcons")));
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zoom_plus->set_icon(get_theme_icon(SNAME("ZoomMore"), SNAME("EditorIcons")));
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} break;
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}
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}
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void EditorZoomWidget::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_zoom", "zoom"), &EditorZoomWidget::set_zoom);
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ClassDB::bind_method(D_METHOD("get_zoom"), &EditorZoomWidget::get_zoom);
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ClassDB::bind_method(D_METHOD("set_zoom_by_increments", "increment", "integer_only"), &EditorZoomWidget::set_zoom_by_increments);
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ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "zoom"), "set_zoom", "get_zoom");
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ADD_SIGNAL(MethodInfo("zoom_changed", PropertyInfo(Variant::FLOAT, "zoom")));
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}
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void EditorZoomWidget::set_shortcut_context(Node *p_node) const {
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zoom_minus->set_shortcut_context(p_node);
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zoom_plus->set_shortcut_context(p_node);
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zoom_reset->set_shortcut_context(p_node);
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}
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EditorZoomWidget::EditorZoomWidget() {
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// Zoom buttons
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zoom_minus = memnew(Button);
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zoom_minus->set_flat(true);
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add_child(zoom_minus);
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zoom_minus->connect("pressed", callable_mp(this, &EditorZoomWidget::_button_zoom_minus));
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zoom_minus->set_shortcut(ED_SHORTCUT_ARRAY("canvas_item_editor/zoom_minus", TTR("Zoom Out"), { int32_t(KeyModifierMask::CMD_OR_CTRL | Key::MINUS), int32_t(KeyModifierMask::CMD_OR_CTRL | Key::KP_SUBTRACT) }));
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zoom_minus->set_shortcut_context(this);
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zoom_minus->set_focus_mode(FOCUS_NONE);
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zoom_reset = memnew(Button);
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zoom_reset->set_flat(true);
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add_child(zoom_reset);
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zoom_reset->add_theme_constant_override("outline_size", 1);
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zoom_reset->add_theme_color_override("font_outline_color", Color(0, 0, 0));
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zoom_reset->add_theme_color_override("font_color", Color(1, 1, 1));
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zoom_reset->connect("pressed", callable_mp(this, &EditorZoomWidget::_button_zoom_reset));
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zoom_reset->set_shortcut(ED_GET_SHORTCUT("canvas_item_editor/zoom_100_percent"));
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zoom_reset->set_shortcut_context(this);
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zoom_reset->set_focus_mode(FOCUS_NONE);
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zoom_reset->set_text_alignment(HORIZONTAL_ALIGNMENT_CENTER);
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// Prevent the button's size from changing when the text size changes
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zoom_reset->set_custom_minimum_size(Size2(75 * EDSCALE, 0));
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zoom_plus = memnew(Button);
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zoom_plus->set_flat(true);
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add_child(zoom_plus);
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zoom_plus->connect("pressed", callable_mp(this, &EditorZoomWidget::_button_zoom_plus));
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zoom_plus->set_shortcut(ED_SHORTCUT_ARRAY("canvas_item_editor/zoom_plus", TTR("Zoom In"), { int32_t(KeyModifierMask::CMD_OR_CTRL | Key::EQUAL), int32_t(KeyModifierMask::CMD_OR_CTRL | Key::KP_ADD) }));
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zoom_plus->set_shortcut_context(this);
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zoom_plus->set_focus_mode(FOCUS_NONE);
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_update_zoom_label();
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add_theme_constant_override("separation", Math::round(-8 * EDSCALE));
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}
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