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https://github.com/godotengine/godot
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205 lines
9.1 KiB
C++
205 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) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 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 "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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