442 lines
13 KiB
C++
442 lines
13 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) 2007-2022 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 "gradient_edit.h"
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#include "core/os/keyboard.h"
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GradientEdit::GradientEdit() {
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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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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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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 - draw_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 = (draw_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_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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GradientEdit::~GradientEdit() {
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}
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void GradientEdit::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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update();
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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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// Show color picker on double click.
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if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && mb->is_double_click() && 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() == MouseButton::RIGHT && 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_at(grabbed);
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grabbed = -1;
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grabbing = false;
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update();
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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.is_valid() && mb->get_button_index() == MouseButton::LEFT && mb->is_pressed() && mb->is_alt_pressed()) {
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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 - draw_spacing;
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Gradient::Point new_point = points[grabbed];
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new_point.offset = CLAMP(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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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() == MouseButton::LEFT && 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 - draw_spacing;
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//Check if color selector was clicked.
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if (x > total_w + draw_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 point.
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Gradient::Point new_point;
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new_point.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 < new_point.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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new_point.color = prev.color.lerp(next.color, (new_point.offset - prev.offset) / (next.offset - prev.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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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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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 - draw_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->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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update();
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}
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}
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void GradientEdit::_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, &GradientEdit::_color_changed))) {
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picker->connect("color_changed", callable_mp(this, &GradientEdit::_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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draw_point_width = BASE_POINT_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;
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// Draw checker pattern for ramp.
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draw_texture_rect(get_theme_icon(SNAME("GuiMiniCheckerboard"), SNAME("EditorIcons")), Rect2(0, 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(0, 0, total_w, h));
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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.inverted();
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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 - draw_point_width / 2, h / 2, draw_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_texture_rect(get_theme_icon(SNAME("GuiMiniCheckerboard"), SNAME("EditorIcons")), Rect2(total_w + draw_spacing, 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(total_w + draw_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 + draw_spacing, 0, h, h), Color(0.5, 0.5, 0.5, 1));
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draw_line(Vector2(total_w + draw_spacing, 0), Vector2(total_w + draw_spacing + h, h), Color(1, 1, 1, 0.6));
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draw_line(Vector2(total_w + draw_spacing, h), Vector2(total_w + draw_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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} 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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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(SNAME("ramp_changed"));
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}
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void GradientEdit::set_ramp(const Vector<real_t> &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<real_t> GradientEdit::get_offsets() const {
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Vector<real_t> 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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points.sort();
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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::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 GradientEdit::get_interpolation_mode() {
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return interpolation_mode;
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}
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ColorPicker *GradientEdit::get_picker() {
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return picker;
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}
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void GradientEdit::_bind_methods() {
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ADD_SIGNAL(MethodInfo("ramp_changed"));
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}
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