461 lines
14 KiB
C++
461 lines
14 KiB
C++
/**************************************************************************/
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/* gradient_editor.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 "gradient_editor.h"
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#include "core/os/keyboard.h"
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#include "editor/editor_node.h"
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#include "editor/editor_scale.h"
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#include "editor/editor_undo_redo_manager.h"
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void GradientEditor::set_gradient(const Ref<Gradient> &p_gradient) {
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gradient = p_gradient;
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connect("ramp_changed", callable_mp(this, &GradientEditor::_ramp_changed));
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gradient->connect("changed", callable_mp(this, &GradientEditor::_gradient_changed));
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set_points(gradient->get_points());
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set_interpolation_mode(gradient->get_interpolation_mode());
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}
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void GradientEditor::reverse_gradient() {
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gradient->reverse();
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set_points(gradient->get_points());
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emit_signal(SNAME("ramp_changed"));
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queue_redraw();
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}
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int GradientEditor::_get_point_from_pos(int x) {
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int result = -1;
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int total_w = get_size().width - get_size().height - draw_spacing - handle_width;
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float min_distance = 1e20;
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for (int i = 0; i < points.size(); i++) {
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// Check if we clicked at point.
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float distance = ABS(x - points[i].offset * total_w);
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float min = handle_width * 0.85; // Allow the mouse to be more than half a handle width away for ease of grabbing.
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if (distance <= min && distance < min_distance) {
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result = i;
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min_distance = distance;
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}
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}
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return result;
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}
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void GradientEditor::_show_color_picker() {
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if (grabbed == -1) {
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return;
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}
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picker->set_pick_color(points[grabbed].color);
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Size2 minsize = popup->get_contents_minimum_size();
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bool show_above = false;
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if (get_global_position().y + get_size().y + minsize.y > get_viewport_rect().size.y) {
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show_above = true;
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}
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if (show_above) {
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popup->set_position(get_screen_position() - Vector2(0, minsize.y));
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} else {
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popup->set_position(get_screen_position() + Vector2(0, get_size().y));
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}
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popup->popup();
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}
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void GradientEditor::_gradient_changed() {
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if (editing) {
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return;
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}
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editing = true;
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Vector<Gradient::Point> grad_points = gradient->get_points();
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set_points(grad_points);
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set_interpolation_mode(gradient->get_interpolation_mode());
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queue_redraw();
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editing = false;
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}
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void GradientEditor::_ramp_changed() {
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editing = true;
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EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
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undo_redo->create_action(TTR("Gradient Edited"), UndoRedo::MERGE_ENDS);
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undo_redo->add_do_method(gradient.ptr(), "set_offsets", get_offsets());
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undo_redo->add_do_method(gradient.ptr(), "set_colors", get_colors());
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undo_redo->add_do_method(gradient.ptr(), "set_interpolation_mode", get_interpolation_mode());
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undo_redo->add_undo_method(gradient.ptr(), "set_offsets", gradient->get_offsets());
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undo_redo->add_undo_method(gradient.ptr(), "set_colors", gradient->get_colors());
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undo_redo->add_undo_method(gradient.ptr(), "set_interpolation_mode", gradient->get_interpolation_mode());
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undo_redo->commit_action();
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editing = false;
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}
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void GradientEditor::_color_changed(const Color &p_color) {
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if (grabbed == -1) {
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return;
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}
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points.write[grabbed].color = p_color;
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queue_redraw();
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emit_signal(SNAME("ramp_changed"));
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}
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void GradientEditor::set_ramp(const Vector<float> &p_offsets, const Vector<Color> &p_colors) {
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ERR_FAIL_COND(p_offsets.size() != p_colors.size());
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points.clear();
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for (int i = 0; i < p_offsets.size(); i++) {
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Gradient::Point p;
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p.offset = p_offsets[i];
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p.color = p_colors[i];
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points.push_back(p);
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}
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points.sort();
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queue_redraw();
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}
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Vector<float> GradientEditor::get_offsets() const {
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Vector<float> ret;
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for (int i = 0; i < points.size(); i++) {
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ret.push_back(points[i].offset);
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}
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return ret;
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}
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Vector<Color> GradientEditor::get_colors() const {
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Vector<Color> ret;
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for (int i = 0; i < points.size(); i++) {
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ret.push_back(points[i].color);
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}
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return ret;
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}
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void GradientEditor::set_points(Vector<Gradient::Point> &p_points) {
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if (points.size() != p_points.size()) {
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grabbed = -1;
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}
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points.clear();
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points = p_points;
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points.sort();
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}
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Vector<Gradient::Point> &GradientEditor::get_points() {
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return points;
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}
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void GradientEditor::set_interpolation_mode(Gradient::InterpolationMode p_interp_mode) {
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interpolation_mode = p_interp_mode;
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}
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Gradient::InterpolationMode GradientEditor::get_interpolation_mode() {
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return interpolation_mode;
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}
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ColorPicker *GradientEditor::get_picker() {
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return picker;
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}
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PopupPanel *GradientEditor::get_popup() {
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return popup;
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}
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Size2 GradientEditor::get_minimum_size() const {
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return Size2(0, 60) * EDSCALE;
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}
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void GradientEditor::gui_input(const Ref<InputEvent> &p_event) {
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ERR_FAIL_COND(p_event.is_null());
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Ref<InputEventKey> k = p_event;
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if (k.is_valid() && k->is_pressed() && k->get_keycode() == Key::KEY_DELETE && grabbed != -1) {
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points.remove_at(grabbed);
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grabbed = -1;
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grabbing = false;
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queue_redraw();
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emit_signal(SNAME("ramp_changed"));
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accept_event();
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}
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Ref<InputEventMouseButton> mb = p_event;
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if (mb.is_valid() && mb->is_pressed()) {
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float adjusted_mb_x = mb->get_position().x - handle_width / 2;
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// Delete point on right click.
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if (mb->get_button_index() == MouseButton::RIGHT) {
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grabbed = _get_point_from_pos(adjusted_mb_x);
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if (grabbed != -1) {
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points.remove_at(grabbed);
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grabbed = -1;
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grabbing = false;
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queue_redraw();
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emit_signal(SNAME("ramp_changed"));
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accept_event();
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}
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}
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// Hold Alt key to duplicate selected color.
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if (mb->get_button_index() == MouseButton::LEFT && mb->is_alt_pressed()) {
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grabbed = _get_point_from_pos(adjusted_mb_x);
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if (grabbed != -1) {
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int total_w = get_size().width - get_size().height - draw_spacing - handle_width;
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Gradient::Point new_point = points[grabbed];
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new_point.offset = CLAMP(adjusted_mb_x / float(total_w), 0, 1);
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points.push_back(new_point);
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points.sort();
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for (int i = 0; i < points.size(); ++i) {
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if (points[i].offset == new_point.offset) {
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grabbed = i;
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break;
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}
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}
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emit_signal(SNAME("ramp_changed"));
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queue_redraw();
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}
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}
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// Select.
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if (mb->get_button_index() == MouseButton::LEFT) {
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queue_redraw();
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int total_w = get_size().width - get_size().height - draw_spacing - handle_width;
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// Check if color selector was clicked or ramp was double-clicked.
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if (adjusted_mb_x > total_w + draw_spacing) {
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if (!mb->is_double_click()) {
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_show_color_picker();
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}
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return;
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} else if (mb->is_double_click()) {
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grabbed = _get_point_from_pos(adjusted_mb_x);
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_show_color_picker();
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accept_event();
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return;
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}
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grabbing = true;
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grabbed = _get_point_from_pos(adjusted_mb_x);
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// Grab or select.
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if (grabbed != -1) {
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return;
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}
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// Insert point.
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Gradient::Point new_point;
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new_point.offset = CLAMP(adjusted_mb_x / float(total_w), 0, 1);
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new_point.color = gradient->get_color_at_offset(new_point.offset);
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points.push_back(new_point);
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points.sort();
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for (int i = 0; i < points.size(); i++) {
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if (points[i].offset == new_point.offset) {
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grabbed = i;
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break;
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}
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}
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emit_signal(SNAME("ramp_changed"));
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}
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}
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if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && !mb->is_pressed()) {
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if (grabbing) {
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grabbing = false;
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emit_signal(SNAME("ramp_changed"));
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}
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queue_redraw();
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}
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Ref<InputEventMouseMotion> mm = p_event;
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if (mm.is_valid() && grabbing) {
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float adjusted_mm_x = mm->get_position().x - handle_width / 2;
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int total_w = get_size().width - get_size().height - draw_spacing - handle_width;
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float newofs = CLAMP(adjusted_mm_x / float(total_w), 0, 1);
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// Snap to "round" coordinates if holding Ctrl.
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// Be more precise if holding Shift as well.
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if (mm->is_ctrl_pressed()) {
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newofs = Math::snapped(newofs, mm->is_shift_pressed() ? 0.025 : 0.1);
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} else if (mm->is_shift_pressed()) {
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// Snap to nearest point if holding just Shift.
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const float snap_threshold = 0.03;
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float smallest_ofs = snap_threshold;
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bool found = false;
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int nearest_point = 0;
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for (int i = 0; i < points.size(); ++i) {
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if (i != grabbed) {
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float temp_ofs = ABS(points[i].offset - newofs);
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if (temp_ofs < smallest_ofs) {
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smallest_ofs = temp_ofs;
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nearest_point = i;
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if (found) {
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break;
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}
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found = true;
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}
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}
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}
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if (found) {
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if (points[nearest_point].offset < newofs) {
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newofs = points[nearest_point].offset + 0.00001;
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} else {
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newofs = points[nearest_point].offset - 0.00001;
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}
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newofs = CLAMP(newofs, 0, 1);
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}
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}
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bool valid = true;
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for (int i = 0; i < points.size(); i++) {
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if (points[i].offset == newofs && i != grabbed) {
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valid = false;
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break;
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}
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}
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if (!valid || grabbed == -1) {
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return;
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}
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points.write[grabbed].offset = newofs;
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points.sort();
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for (int i = 0; i < points.size(); i++) {
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if (points[i].offset == newofs) {
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grabbed = i;
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break;
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}
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}
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emit_signal(SNAME("ramp_changed"));
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queue_redraw();
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}
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}
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void GradientEditor::_notification(int p_what) {
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switch (p_what) {
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case NOTIFICATION_ENTER_TREE: {
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if (!picker->is_connected("color_changed", callable_mp(this, &GradientEditor::_color_changed))) {
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picker->connect("color_changed", callable_mp(this, &GradientEditor::_color_changed));
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}
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[[fallthrough]];
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}
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case NOTIFICATION_THEME_CHANGED: {
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draw_spacing = BASE_SPACING * get_theme_default_base_scale();
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handle_width = BASE_HANDLE_WIDTH * get_theme_default_base_scale();
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} break;
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case NOTIFICATION_DRAW: {
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int w = get_size().x;
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int h = get_size().y;
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if (w == 0 || h == 0) {
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return; // Safety check. We have division by 'h'. And in any case there is nothing to draw with such size.
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}
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int total_w = get_size().width - get_size().height - draw_spacing - handle_width;
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// Draw checker pattern for ramp.
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draw_texture_rect(get_theme_icon(SNAME("GuiMiniCheckerboard"), SNAME("EditorIcons")), Rect2(handle_width / 2, 0, total_w, h), true);
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// Draw color ramp.
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gradient_cache->set_points(points);
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gradient_cache->set_interpolation_mode(interpolation_mode);
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preview_texture->set_gradient(gradient_cache);
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draw_texture_rect(preview_texture, Rect2(handle_width / 2, 0, total_w, h));
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// Draw borders around color ramp if in focus.
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if (has_focus()) {
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draw_rect(Rect2(handle_width / 2, 0, total_w, h), Color(1, 1, 1, 0.9), false, 1);
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}
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// Draw point markers.
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for (int i = 0; i < points.size(); i++) {
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Color col = points[i].color.get_v() > 0.5 ? Color(0, 0, 0) : Color(1, 1, 1);
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col.a = 0.9;
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draw_line(Vector2(points[i].offset * total_w + handle_width / 2, 0), Vector2(points[i].offset * total_w + handle_width / 2, h / 2), col);
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Rect2 rect = Rect2(points[i].offset * total_w, h / 2, handle_width, h / 2);
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draw_rect(rect, points[i].color, true);
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draw_rect(rect, col, false, 1);
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if (grabbed == i) {
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const Color focus_color = get_theme_color(SNAME("accent_color"), SNAME("Editor"));
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rect = rect.grow(-1);
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if (has_focus()) {
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draw_rect(rect, focus_color, false, 1);
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} else {
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draw_rect(rect, focus_color.darkened(0.4), false, 1);
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}
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rect = rect.grow(-1);
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draw_rect(rect, col, false, 1);
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}
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}
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// Draw "button" for color selector.
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int button_offset = total_w + handle_width + draw_spacing;
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draw_texture_rect(get_theme_icon(SNAME("GuiMiniCheckerboard"), SNAME("EditorIcons")), Rect2(button_offset, 0, h, h), true);
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if (grabbed != -1) {
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// Draw with selection color.
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draw_rect(Rect2(button_offset, 0, h, h), points[grabbed].color);
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} else {
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// If no color selected draw gray color with 'X' on top.
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draw_rect(Rect2(button_offset, 0, h, h), Color(0.5, 0.5, 0.5, 1));
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draw_line(Vector2(button_offset, 0), Vector2(button_offset + h, h), Color(1, 1, 1, 0.6));
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draw_line(Vector2(button_offset, h), Vector2(button_offset + h, 0), Color(1, 1, 1, 0.6));
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}
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} break;
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case NOTIFICATION_VISIBILITY_CHANGED: {
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if (!is_visible()) {
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grabbing = false;
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}
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} break;
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}
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}
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void GradientEditor::_bind_methods() {
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ADD_SIGNAL(MethodInfo("ramp_changed"));
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}
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GradientEditor::GradientEditor() {
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set_focus_mode(FOCUS_ALL);
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popup = memnew(PopupPanel);
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picker = memnew(ColorPicker);
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popup->add_child(picker);
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popup->connect("about_to_popup", callable_mp(EditorNode::get_singleton(), &EditorNode::setup_color_picker).bind(GradientEditor::get_picker()));
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gradient_cache.instantiate();
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preview_texture.instantiate();
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preview_texture->set_width(1024);
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add_child(popup, false, INTERNAL_MODE_FRONT);
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}
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GradientEditor::~GradientEditor() {
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}
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