490 lines
14 KiB
C++
490 lines
14 KiB
C++
/*************************************************************************/
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/* gradient_edit.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) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 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 "gradient_edit.h"
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#include "core/os/keyboard.h"
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#ifdef TOOLS_ENABLED
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#include "editor/editor_scale.h"
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#define SPACING (3 * EDSCALE)
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#define POINT_WIDTH (8 * EDSCALE)
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#else
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#define SPACING 3
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#define POINT_WIDTH 8
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#endif
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GradientEdit::GradientEdit() {
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grabbed = -1;
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grabbing = false;
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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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add_child(popup);
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checker = Ref<ImageTexture>(memnew(ImageTexture));
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Ref<Image> img = memnew(Image(checker_bg_png));
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checker->create_from_image(img, ImageTexture::FLAG_REPEAT);
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}
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int GradientEdit::_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 - SPACING;
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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 = (POINT_WIDTH / 2 * 1.7); //make it easier to grab
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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 GradientEdit::_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_combined_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_global_position() - Vector2(0, minsize.y));
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} else {
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popup->set_position(get_global_position() + Vector2(0, get_size().y));
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}
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popup->popup();
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}
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GradientEdit::~GradientEdit() {
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}
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void GradientEdit::_gui_input(const Ref<InputEvent> &p_event) {
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Ref<InputEventKey> k = p_event;
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if (k.is_valid() && k->is_pressed() && k->get_scancode() == KEY_DELETE && grabbed != -1) {
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points.remove(grabbed);
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grabbed = -1;
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grabbing = false;
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update();
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emit_signal("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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//Show color picker on double click.
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if (mb.is_valid() && mb->get_button_index() == 1 && mb->is_doubleclick() && mb->is_pressed()) {
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grabbed = _get_point_from_pos(mb->get_position().x);
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_show_color_picker();
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accept_event();
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}
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//Delete point on right click
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if (mb.is_valid() && mb->get_button_index() == 2 && mb->is_pressed()) {
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grabbed = _get_point_from_pos(mb->get_position().x);
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if (grabbed != -1) {
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points.remove(grabbed);
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grabbed = -1;
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grabbing = false;
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update();
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emit_signal("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.is_valid() && mb->get_button_index() == 1 && mb->is_pressed() && mb->get_alt()) {
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int x = mb->get_position().x;
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grabbed = _get_point_from_pos(x);
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if (grabbed != -1) {
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int total_w = get_size().width - get_size().height - SPACING;
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Gradient::Point newPoint = points[grabbed];
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newPoint.offset = CLAMP(x / float(total_w), 0, 1);
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points.push_back(newPoint);
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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 == newPoint.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("ramp_changed");
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update();
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}
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}
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//select
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if (mb.is_valid() && mb->get_button_index() == 1 && mb->is_pressed()) {
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update();
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int x = mb->get_position().x;
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int total_w = get_size().width - get_size().height - SPACING;
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//Check if color selector was clicked.
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if (x > total_w + SPACING) {
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_show_color_picker();
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return;
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}
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grabbing = true;
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grabbed = _get_point_from_pos(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
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Gradient::Point newPoint;
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newPoint.offset = CLAMP(x / float(total_w), 0, 1);
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Gradient::Point prev;
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Gradient::Point next;
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int pos = -1;
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for (int i = 0; i < points.size(); i++) {
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if (points[i].offset < newPoint.offset) {
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pos = i;
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}
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}
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if (pos == -1) {
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prev.color = Color(0, 0, 0);
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prev.offset = 0;
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if (points.size()) {
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next = points[0];
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} else {
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next.color = Color(1, 1, 1);
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next.offset = 1.0;
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}
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} else {
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if (pos == points.size() - 1) {
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next.color = Color(1, 1, 1);
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next.offset = 1.0;
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} else {
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next = points[pos + 1];
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}
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prev = points[pos];
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}
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newPoint.color = prev.color.linear_interpolate(next.color, (newPoint.offset - prev.offset) / (next.offset - prev.offset));
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points.push_back(newPoint);
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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 == newPoint.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("ramp_changed");
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}
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if (mb.is_valid() && mb->get_button_index() == 1 && !mb->is_pressed()) {
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if (grabbing) {
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grabbing = false;
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emit_signal("ramp_changed");
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}
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update();
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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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int total_w = get_size().width - get_size().height - SPACING;
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int x = mm->get_position().x;
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float newofs = CLAMP(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->get_control()) {
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newofs = Math::stepify(newofs, mm->get_shift() ? 0.025 : 0.1);
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} else if (mm->get_shift()) {
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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("ramp_changed");
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update();
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}
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}
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void GradientEdit::_notification(int p_what) {
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if (p_what == NOTIFICATION_ENTER_TREE) {
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if (!picker->is_connected("color_changed", this, "_color_changed")) {
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picker->connect("color_changed", this, "_color_changed");
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}
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}
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if (p_what == 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 - SPACING;
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//Draw checker pattern for ramp
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_draw_checker(0, 0, total_w, h);
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//Draw color ramp
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Gradient::Point prev;
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prev.offset = 0;
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if (points.size() == 0) {
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prev.color = Color(0, 0, 0); //Draw black rectangle if we have no points
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} else {
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prev.color = points[0].color; //Extend color of first point to the beginning.
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}
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for (int i = -1; i < points.size(); i++) {
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Gradient::Point next;
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//If there is no next point
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if (i + 1 == points.size()) {
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if (points.size() == 0) {
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next.color = Color(0, 0, 0); //Draw black rectangle if we have no points
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} else {
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next.color = points[i].color; //Extend color of last point to the end.
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}
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next.offset = 1;
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} else {
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next = points[i + 1];
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}
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if (prev.offset == next.offset) {
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prev = next;
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continue;
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}
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Vector<Vector2> points;
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Vector<Color> colors;
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points.push_back(Vector2(prev.offset * total_w, h));
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points.push_back(Vector2(prev.offset * total_w, 0));
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points.push_back(Vector2(next.offset * total_w, 0));
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points.push_back(Vector2(next.offset * total_w, h));
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colors.push_back(prev.color);
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colors.push_back(prev.color);
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colors.push_back(next.color);
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colors.push_back(next.color);
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draw_primitive(points, colors, Vector<Point2>());
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prev = next;
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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.contrasted();
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col.a = 0.9;
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draw_line(Vector2(points[i].offset * total_w, 0), Vector2(points[i].offset * total_w, h / 2), col);
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Rect2 rect = Rect2(points[i].offset * total_w - POINT_WIDTH / 2, h / 2, POINT_WIDTH, h / 2);
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draw_rect(rect, points[i].color, true);
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draw_rect(rect, col, false);
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if (grabbed == i) {
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rect = rect.grow(-1);
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if (has_focus()) {
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draw_rect(rect, Color(1, 0, 0, 0.9), false);
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} else {
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draw_rect(rect, Color(0.6, 0, 0, 0.9), false);
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}
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rect = rect.grow(-1);
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draw_rect(rect, col, false);
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}
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}
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//Draw "button" for color selector
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_draw_checker(total_w + SPACING, 0, h, h);
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if (grabbed != -1) {
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//Draw with selection color
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draw_rect(Rect2(total_w + SPACING, 0, h, h), points[grabbed].color);
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} else {
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//if no color selected draw grey color with 'X' on top.
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draw_rect(Rect2(total_w + SPACING, 0, h, h), Color(0.5, 0.5, 0.5, 1));
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draw_line(Vector2(total_w + SPACING, 0), Vector2(total_w + SPACING + h, h), Color(1, 1, 1, 0.6));
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draw_line(Vector2(total_w + SPACING, h), Vector2(total_w + SPACING + h, 0), Color(1, 1, 1, 0.6));
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}
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//Draw borders around color ramp if in focus
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if (has_focus()) {
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draw_line(Vector2(-1, -1), Vector2(total_w + 1, -1), Color(1, 1, 1, 0.6));
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draw_line(Vector2(total_w + 1, -1), Vector2(total_w + 1, h + 1), Color(1, 1, 1, 0.6));
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draw_line(Vector2(total_w + 1, h + 1), Vector2(-1, h + 1), Color(1, 1, 1, 0.6));
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draw_line(Vector2(-1, -1), Vector2(-1, h + 1), Color(1, 1, 1, 0.6));
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}
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}
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if (p_what == NOTIFICATION_VISIBILITY_CHANGED) {
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if (!is_visible()) {
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grabbing = false;
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}
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}
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}
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void GradientEdit::_draw_checker(int x, int y, int w, int h) {
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//Draw it with polygon to insert UVs for scale
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Vector<Vector2> backPoints;
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backPoints.push_back(Vector2(x, y));
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backPoints.push_back(Vector2(x, y + h));
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backPoints.push_back(Vector2(x + w, y + h));
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backPoints.push_back(Vector2(x + w, y));
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Vector<Color> colorPoints;
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colorPoints.push_back(Color(1, 1, 1, 1));
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colorPoints.push_back(Color(1, 1, 1, 1));
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colorPoints.push_back(Color(1, 1, 1, 1));
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colorPoints.push_back(Color(1, 1, 1, 1));
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Vector<Vector2> uvPoints;
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//Draw checker pattern pixel-perfect and scale it by 2.
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uvPoints.push_back(Vector2(x, y));
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uvPoints.push_back(Vector2(x, y + h * .5f / checker->get_height()));
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uvPoints.push_back(Vector2(x + w * .5f / checker->get_width(), y + h * .5f / checker->get_height()));
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uvPoints.push_back(Vector2(x + w * .5f / checker->get_width(), y));
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draw_polygon(backPoints, colorPoints, uvPoints, checker);
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}
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Size2 GradientEdit::get_minimum_size() const {
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return Vector2(0, 16);
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}
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void GradientEdit::_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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update();
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emit_signal("ramp_changed");
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}
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void GradientEdit::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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update();
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}
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Vector<float> GradientEdit::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> GradientEdit::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 GradientEdit::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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}
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Vector<Gradient::Point> &GradientEdit::get_points() {
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return points;
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}
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void GradientEdit::_bind_methods() {
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ClassDB::bind_method(D_METHOD("_gui_input"), &GradientEdit::_gui_input);
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ClassDB::bind_method(D_METHOD("_color_changed"), &GradientEdit::_color_changed);
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ADD_SIGNAL(MethodInfo("ramp_changed"));
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}
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