Added EditorZoomWidget from Godot4.

tile_editor/editor_zoom_widget.cpp

@@ -0,0 +1,201 @@
+/*************************************************************************/
+/*  editor_zoom_widget.cpp                                               */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* 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 "editor_zoom_widget.h"
+
+#include "core/os/keyboard.h"
+#include "editor/editor_scale.h"
+#include "editor/editor_settings.h"
+
+void EditorZoomWidget::_update_zoom_label() {
+	String zoom_text;
+	// The zoom level displayed is relative to the editor scale
+	// (like in most image editors). Its lower bound is clamped to 1 as some people
+	// lower the editor scale to increase the available real estate,
+	// even if their display doesn't have a particularly low DPI.
+	if (zoom >= 10) {
+		// Don't show a decimal when the zoom level is higher than 1000 %.
+		zoom_text = TS->format_number(rtos(Math::round((zoom / MAX(1, EDSCALE)) * 100))) + " " + TS->percent_sign();
+	} else {
+		zoom_text = TS->format_number(rtos(Math::snapped((zoom / MAX(1, EDSCALE)) * 100, 0.1))) + " " + TS->percent_sign();
+	}
+
+	zoom_reset->set_text(zoom_text);
+}
+
+void EditorZoomWidget::_button_zoom_minus() {
+	set_zoom_by_increments(-6, Input::get_singleton()->is_key_pressed(Key::ALT));
+	emit_signal("zoom_changed", zoom);
+}
+
+void EditorZoomWidget::_button_zoom_reset() {
+	set_zoom(1.0 * MAX(1, EDSCALE));
+	emit_signal("zoom_changed", zoom);
+}
+
+void EditorZoomWidget::_button_zoom_plus() {
+	set_zoom_by_increments(6, Input::get_singleton()->is_key_pressed(Key::ALT));
+	emit_signal("zoom_changed", zoom);
+}
+
+float EditorZoomWidget::get_zoom() {
+	return zoom;
+}
+
+void EditorZoomWidget::set_zoom(float p_zoom) {
+	if (p_zoom > 0 && p_zoom != zoom) {
+		zoom = p_zoom;
+		_update_zoom_label();
+	}
+}
+
+void EditorZoomWidget::set_zoom_by_increments(int p_increment_count, bool p_integer_only) {
+	// Remove editor scale from the index computation.
+	const float zoom_noscale = zoom / MAX(1, EDSCALE);
+
+	if (p_integer_only) {
+		// Only visit integer scaling factors above 100%, and fractions with an integer denominator below 100%
+		// (1/2 = 50%, 1/3 = 33.33%, 1/4 = 25%, …).
+		// This is useful when working on pixel art projects to avoid distortion.
+		// This algorithm is designed to handle fractional start zoom values correctly
+		// (e.g. 190% will zoom up to 200% and down to 100%).
+		if (zoom_noscale + p_increment_count * 0.001 >= 1.0 - CMP_EPSILON) {
+			// New zoom is certain to be above 100%.
+			if (p_increment_count >= 1) {
+				// Zooming.
+				set_zoom(Math::floor(zoom_noscale + p_increment_count) * MAX(1, EDSCALE));
+			} else {
+				// Dezooming.
+				set_zoom(Math::ceil(zoom_noscale + p_increment_count) * MAX(1, EDSCALE));
+			}
+		} else {
+			if (p_increment_count >= 1) {
+				// Zooming. Convert the current zoom into a denominator.
+				float new_zoom = 1.0 / Math::ceil(1.0 / zoom_noscale - p_increment_count);
+				if (Math::is_equal_approx(zoom_noscale, new_zoom)) {
+					// New zoom is identical to the old zoom, so try again.
+					// This can happen due to floating-point precision issues.
+					new_zoom = 1.0 / Math::ceil(1.0 / zoom_noscale - p_increment_count - 1);
+				}
+				set_zoom(new_zoom * MAX(1, EDSCALE));
+			} else {
+				// Dezooming. Convert the current zoom into a denominator.
+				float new_zoom = 1.0 / Math::floor(1.0 / zoom_noscale - p_increment_count);
+				if (Math::is_equal_approx(zoom_noscale, new_zoom)) {
+					// New zoom is identical to the old zoom, so try again.
+					// This can happen due to floating-point precision issues.
+					new_zoom = 1.0 / Math::floor(1.0 / zoom_noscale - p_increment_count + 1);
+				}
+				set_zoom(new_zoom * MAX(1, EDSCALE));
+			}
+		}
+	} else {
+		// Base increment factor defined as the twelveth root of two.
+		// This allow a smooth geometric evolution of the zoom, with the advantage of
+		// visiting all integer power of two scale factors.
+		// note: this is analogous to the 'semitones' interval in the music world
+		// In order to avoid numerical imprecisions, we compute and edit a zoom index
+		// with the following relation: zoom = 2 ^ (index / 12)
+
+		if (zoom < CMP_EPSILON || p_increment_count == 0) {
+			return;
+		}
+
+		// zoom = 2**(index/12) => log2(zoom) = index/12
+		float closest_zoom_index = Math::round(Math::log(zoom_noscale) * 12.f / Math::log(2.f));
+
+		float new_zoom_index = closest_zoom_index + p_increment_count;
+		float new_zoom = Math::pow(2.f, new_zoom_index / 12.f);
+
+		// Restore Editor scale transformation
+		new_zoom *= MAX(1, EDSCALE);
+
+		set_zoom(new_zoom);
+	}
+}
+
+void EditorZoomWidget::_notification(int p_what) {
+	switch (p_what) {
+		case NOTIFICATION_ENTER_TREE:
+		case NOTIFICATION_THEME_CHANGED:
+			zoom_minus->set_icon(get_theme_icon("ZoomLess", "EditorIcons"));
+			zoom_plus->set_icon(get_theme_icon("ZoomMore", "EditorIcons"));
+			break;
+		default:
+			break;
+	}
+}
+
+void EditorZoomWidget::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("set_zoom", "zoom"), &EditorZoomWidget::set_zoom);
+	ClassDB::bind_method(D_METHOD("get_zoom"), &EditorZoomWidget::get_zoom);
+	ClassDB::bind_method(D_METHOD("set_zoom_by_increments", "increment", "integer_only"), &EditorZoomWidget::set_zoom_by_increments);
+
+	ADD_PROPERTY(PropertyInfo(Variant::REAL, "zoom"), "set_zoom", "get_zoom");
+
+	ADD_SIGNAL(MethodInfo("zoom_changed", PropertyInfo(Variant::REAL, "zoom")));
+}
+
+EditorZoomWidget::EditorZoomWidget() {
+	// Zoom buttons
+	zoom_minus = memnew(Button);
+	zoom_minus->set_flat(true);
+	add_child(zoom_minus);
+	zoom_minus->connect("pressed", callable_mp(this, &EditorZoomWidget::_button_zoom_minus));
+	zoom_minus->set_shortcut(ED_SHORTCUT("canvas_item_editor/zoom_minus", TTR("Zoom Out"), KeyModifierMask::CMD | Key::MINUS));
+	zoom_minus->set_shortcut_context(this);
+	zoom_minus->set_focus_mode(FOCUS_NONE);
+
+	zoom_reset = memnew(Button);
+	zoom_reset->set_flat(true);
+	add_child(zoom_reset);
+	zoom_reset->add_theme_constant_override("outline_size", 1);
+	zoom_reset->add_theme_color_override("font_outline_color", Color(0, 0, 0));
+	zoom_reset->add_theme_color_override("font_color", Color(1, 1, 1));
+	zoom_reset->connect("pressed", callable_mp(this, &EditorZoomWidget::_button_zoom_reset));
+	zoom_reset->set_shortcut(ED_SHORTCUT("canvas_item_editor/zoom_reset", TTR("Zoom Reset"), KeyModifierMask::CMD | Key::KEY_0));
+	zoom_reset->set_shortcut_context(this);
+	zoom_reset->set_focus_mode(FOCUS_NONE);
+	zoom_reset->set_text_alignment(HORIZONTAL_ALIGNMENT_CENTER);
+	// Prevent the button's size from changing when the text size changes
+	zoom_reset->set_custom_minimum_size(Size2(75 * EDSCALE, 0));
+
+	zoom_plus = memnew(Button);
+	zoom_plus->set_flat(true);
+	add_child(zoom_plus);
+	zoom_plus->connect("pressed", callable_mp(this, &EditorZoomWidget::_button_zoom_plus));
+	zoom_plus->set_shortcut(ED_SHORTCUT("canvas_item_editor/zoom_plus", TTR("Zoom In"), KeyModifierMask::CMD | Key::EQUAL)); // Usually direct access key for PLUS
+	zoom_plus->set_shortcut_context(this);
+	zoom_plus->set_focus_mode(FOCUS_NONE);
+
+	_update_zoom_label();
+
+	add_theme_constant_override("separation", Math::round(-8 * EDSCALE));
+}

tile_editor/editor_zoom_widget.h

@@ -0,0 +1,62 @@
+/*************************************************************************/
+/*  editor_zoom_widget.h                                                 */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* 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.                */
+/*************************************************************************/
+
+#ifndef EDITOR_ZOOM_WIDGET_H
+#define EDITOR_ZOOM_WIDGET_H
+
+#include "scene/gui/box_container.h"
+#include "scene/gui/button.h"
+
+class EditorZoomWidget : public HBoxContainer {
+	GDCLASS(EditorZoomWidget, HBoxContainer);
+
+	Button *zoom_minus;
+	Button *zoom_reset;
+	Button *zoom_plus;
+
+	float zoom = 1.0;
+	void _update_zoom_label();
+	void _button_zoom_minus();
+	void _button_zoom_reset();
+	void _button_zoom_plus();
+
+protected:
+	void _notification(int p_what);
+	static void _bind_methods();
+
+public:
+	EditorZoomWidget();
+
+	float get_zoom();
+	void set_zoom(float p_zoom);
+	void set_zoom_by_increments(int p_increment_count, bool p_integer_only = false);
+};
+
+#endif // EDITOR_ZOOM_WIDGET_H

tile_editor/tile_atlas_view.h

@@ -31,7 +31,7 @@
 #ifndef RTILE_ATLAS_VIEW_H
 #define RTILE_ATLAS_VIEW_H
 
-#include "editor/editor_zoom_widget.h"
+#include "editor_zoom_widget.h"
 #include "scene/gui/box_container.h"
 #include "scene/gui/button.h"
 #include "scene/gui/center_container.h"