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godot/editor/plugins/gradient_texture_editor_plugin.cpp

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/*************************************************************************/
/* gradient_texture_editor_plugin.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "gradient_texture_editor_plugin.h"
#include "canvas_item_editor_plugin.h"
#include "os/keyboard.h"
#include "scene/resources/default_theme/theme_data.h"
#include "spatial_editor_plugin.h"
#define POINT_WIDTH 8
GradientTextureEdit::GradientTextureEdit() {
grabbed = -1;
grabbing = false;
set_focus_mode(FOCUS_ALL);
popup = memnew(PopupPanel);
picker = memnew(ColorPicker);
popup->add_child(picker);
add_child(popup);
checker = Ref<ImageTexture>(memnew(ImageTexture));
Ref<Image> checker_bg = memnew(Image(checker_bg_png));
checker->create_from_image(checker_bg, ImageTexture::FLAG_REPEAT);
}
int GradientTextureEdit::_get_point_from_pos(int x) {
int result = -1;
int total_w = get_size().width - get_size().height - 3;
for (int i = 0; i < points.size(); i++) {
//Check if we clicked at point
if (ABS(x - points[i].offset * total_w + 1) < (POINT_WIDTH / 2 + 1)) {
result = i;
}
}
return result;
}
void GradientTextureEdit::_show_color_picker() {
if (grabbed == -1)
return;
Size2 ms = Size2(350, picker->get_combined_minimum_size().height + 10);
picker->set_pick_color(points[grabbed].color);
popup->set_position(get_global_position() - Vector2(ms.width - get_size().width, ms.height));
popup->set_size(ms);
popup->popup();
}
GradientTextureEdit::~GradientTextureEdit() {
}
void GradientTextureEdit::_gui_input(const InputEvent &p_event) {
if (p_event.type == InputEvent::KEY && p_event.key.pressed && p_event.key.scancode == KEY_DELETE && grabbed != -1) {
points.remove(grabbed);
grabbed = -1;
grabbing = false;
update();
emit_signal("ramp_changed");
accept_event();
}
//Show color picker on double click.
if (p_event.type == InputEvent::MOUSE_BUTTON && p_event.mouse_button.button_index == 1 && p_event.mouse_button.doubleclick && p_event.mouse_button.pressed) {
grabbed = _get_point_from_pos(p_event.mouse_button.x);
_show_color_picker();
accept_event();
}
//Delete point on right click
if (p_event.type == InputEvent::MOUSE_BUTTON && p_event.mouse_button.button_index == 2 && p_event.mouse_button.pressed) {
grabbed = _get_point_from_pos(p_event.mouse_button.x);
if (grabbed != -1) {
points.remove(grabbed);
grabbed = -1;
grabbing = false;
update();
emit_signal("ramp_changed");
accept_event();
}
}
//Hold alt key to duplicate selected color
if (p_event.type == InputEvent::MOUSE_BUTTON && p_event.mouse_button.button_index == 1 && p_event.mouse_button.pressed && p_event.key.mod.alt) {
int x = p_event.mouse_button.x;
grabbed = _get_point_from_pos(x);
if (grabbed != -1) {
int total_w = get_size().width - get_size().height - 3;
GradientTexture::Point newPoint = points[grabbed];
newPoint.offset = CLAMP(x / float(total_w), 0, 1);
points.push_back(newPoint);
points.sort();
for (int i = 0; i < points.size(); ++i) {
if (points[i].offset == newPoint.offset) {
grabbed = i;
break;
}
}
emit_signal("ramp_changed");
update();
}
}
if (p_event.type == InputEvent::MOUSE_BUTTON && p_event.mouse_button.button_index == 1 && p_event.mouse_button.pressed) {
update();
int x = p_event.mouse_button.x;
int total_w = get_size().width - get_size().height - 3;
//Check if color selector was clicked.
if (x > total_w + 3) {
_show_color_picker();
return;
}
grabbing = true;
grabbed = _get_point_from_pos(x);
//grab or select
if (grabbed != -1) {
return;
}
//insert
GradientTexture::Point newPoint;
newPoint.offset = CLAMP(x / float(total_w), 0, 1);
GradientTexture::Point prev;
GradientTexture::Point next;
int pos = -1;
for (int i = 0; i < points.size(); i++) {
if (points[i].offset < newPoint.offset)
pos = i;
}
if (pos == -1) {
prev.color = Color(0, 0, 0);
prev.offset = 0;
if (points.size()) {
next = points[0];
} else {
next.color = Color(1, 1, 1);
next.offset = 1.0;
}
} else {
if (pos == points.size() - 1) {
next.color = Color(1, 1, 1);
next.offset = 1.0;
} else {
next = points[pos + 1];
}
prev = points[pos];
}
newPoint.color = prev.color.linear_interpolate(next.color, (newPoint.offset - prev.offset) / (next.offset - prev.offset));
points.push_back(newPoint);
points.sort();
for (int i = 0; i < points.size(); i++) {
if (points[i].offset == newPoint.offset) {
grabbed = i;
break;
}
}
emit_signal("ramp_changed");
}
if (p_event.type == InputEvent::MOUSE_BUTTON && p_event.mouse_button.button_index == 1 && !p_event.mouse_button.pressed) {
if (grabbing) {
grabbing = false;
emit_signal("ramp_changed");
}
update();
}
if (p_event.type == InputEvent::MOUSE_MOTION && grabbing) {
int total_w = get_size().width - get_size().height - 3;
int x = p_event.mouse_motion.x;
float newofs = CLAMP(x / float(total_w), 0, 1);
//Snap to nearest point if holding shift
if (p_event.key.mod.shift) {
float snap_treshhold = 0.03;
float smallest_ofs = snap_treshhold;
bool founded = false;
int nearest_point;
for (int i = 0; i < points.size(); ++i) {
if (i != grabbed) {
float temp_ofs = ABS(points[i].offset - newofs);
if (temp_ofs < smallest_ofs) {
smallest_ofs = temp_ofs;
nearest_point = i;
if (founded)
break;
founded = true;
}
}
}
if (founded) {
if (points[nearest_point].offset < newofs)
newofs = points[nearest_point].offset + 0.00001;
else
newofs = points[nearest_point].offset - 0.00001;
newofs = CLAMP(newofs, 0, 1);
}
}
bool valid = true;
for (int i = 0; i < points.size(); i++) {
if (points[i].offset == newofs && i != grabbed) {
valid = false;
}
}
if (!valid)
return;
points[grabbed].offset = newofs;
points.sort();
for (int i = 0; i < points.size(); i++) {
if (points[i].offset == newofs) {
grabbed = i;
break;
}
}
emit_signal("ramp_changed");
update();
}
}
void GradientTextureEdit::_notification(int p_what) {
if (p_what == NOTIFICATION_ENTER_TREE) {
if (!picker->is_connected("color_changed", this, "_color_changed")) {
picker->connect("color_changed", this, "_color_changed");
}
}
if (p_what == NOTIFICATION_DRAW) {
int w = get_size().x;
int h = get_size().y;
if (w == 0 || h == 0)
return; //Safety check. We have division by 'h'. And in any case there is nothing to draw with such size
int total_w = get_size().width - get_size().height - 3;
//Draw checker pattern for ramp
_draw_checker(0, 0, total_w, h);
//Draw color ramp
GradientTexture::Point prev;
prev.offset = 0;
if (points.size() == 0)
prev.color = Color(0, 0, 0); //Draw black rectangle if we have no points
else
prev.color = points[0].color; //Extend color of first point to the beginning.
for (int i = -1; i < points.size(); i++) {
GradientTexture::Point next;
//If there is no next point
if (i + 1 == points.size()) {
if (points.size() == 0)
next.color = Color(0, 0, 0); //Draw black rectangle if we have no points
else
next.color = points[i].color; //Extend color of last point to the end.
next.offset = 1;
} else {
next = points[i + 1];
}
if (prev.offset == next.offset) {
prev = next;
continue;
}
Vector<Vector2> points;
Vector<Color> colors;
points.push_back(Vector2(prev.offset * total_w, h));
points.push_back(Vector2(prev.offset * total_w, 0));
points.push_back(Vector2(next.offset * total_w, 0));
points.push_back(Vector2(next.offset * total_w, h));
colors.push_back(prev.color);
colors.push_back(prev.color);
colors.push_back(next.color);
colors.push_back(next.color);
draw_primitive(points, colors, Vector<Point2>());
prev = next;
}
//Draw point markers
for (int i = 0; i < points.size(); i++) {
Color col = i == grabbed ? Color(1, 0.0, 0.0, 0.9) : points[i].color.contrasted();
col.a = 0.9;
draw_line(Vector2(points[i].offset * total_w, 0), Vector2(points[i].offset * total_w, h / 2), col);
draw_rect(Rect2(points[i].offset * total_w - POINT_WIDTH / 2, h / 2, POINT_WIDTH, h / 2), Color(0.6, 0.6, 0.6, i == grabbed ? 0.9 : 0.4));
draw_line(Vector2(points[i].offset * total_w - POINT_WIDTH / 2, h / 2), Vector2(points[i].offset * total_w - POINT_WIDTH / 2, h - 1), col);
draw_line(Vector2(points[i].offset * total_w + POINT_WIDTH / 2, h / 2), Vector2(points[i].offset * total_w + POINT_WIDTH / 2, h - 1), col);
draw_line(Vector2(points[i].offset * total_w - POINT_WIDTH / 2, h / 2), Vector2(points[i].offset * total_w + POINT_WIDTH / 2, h / 2), col);
draw_line(Vector2(points[i].offset * total_w - POINT_WIDTH / 2, h - 1), Vector2(points[i].offset * total_w + POINT_WIDTH / 2, h - 1), col);
}
//Draw "button" for color selector
_draw_checker(total_w + 3, 0, h, h);
if (grabbed != -1) {
//Draw with selection color
draw_rect(Rect2(total_w + 3, 0, h, h), points[grabbed].color);
} else {
//if no color selected draw grey color with 'X' on top.
draw_rect(Rect2(total_w + 3, 0, h, h), Color(0.5, 0.5, 0.5, 1));
draw_line(Vector2(total_w + 3, 0), Vector2(total_w + 3 + h, h), Color(1, 1, 1, 0.6));
draw_line(Vector2(total_w + 3, h), Vector2(total_w + 3 + h, 0), Color(1, 1, 1, 0.6));
}
//Draw borders around color ramp if in focus
if (has_focus()) {
draw_line(Vector2(-1, -1), Vector2(total_w + 1, -1), Color(1, 1, 1, 0.6));
draw_line(Vector2(total_w + 1, -1), Vector2(total_w + 1, h + 1), Color(1, 1, 1, 0.6));
draw_line(Vector2(total_w + 1, h + 1), Vector2(-1, h + 1), Color(1, 1, 1, 0.6));
draw_line(Vector2(-1, -1), Vector2(-1, h + 1), Color(1, 1, 1, 0.6));
}
}
}
void GradientTextureEdit::_draw_checker(int x, int y, int w, int h) {
//Draw it with polygon to insert UVs for scale
Vector<Vector2> backPoints;
backPoints.push_back(Vector2(x, y));
backPoints.push_back(Vector2(x, y + h));
backPoints.push_back(Vector2(x + w, y + h));
backPoints.push_back(Vector2(x + w, y));
Vector<Color> colorPoints;
colorPoints.push_back(Color(1, 1, 1, 1));
colorPoints.push_back(Color(1, 1, 1, 1));
colorPoints.push_back(Color(1, 1, 1, 1));
colorPoints.push_back(Color(1, 1, 1, 1));
Vector<Vector2> uvPoints;
//Draw checker pattern pixel-perfect and scale it by 2.
uvPoints.push_back(Vector2(x, y));
uvPoints.push_back(Vector2(x, y + h * .5f / checker->get_height()));
uvPoints.push_back(Vector2(x + w * .5f / checker->get_width(), y + h * .5f / checker->get_height()));
uvPoints.push_back(Vector2(x + w * .5f / checker->get_width(), y));
draw_polygon(backPoints, colorPoints, uvPoints, checker);
}
Size2 GradientTextureEdit::get_minimum_size() const {
return Vector2(0, 16);
}
void GradientTextureEdit::_color_changed(const Color &p_color) {
if (grabbed == -1)
return;
points[grabbed].color = p_color;
update();
emit_signal("ramp_changed");
}
void GradientTextureEdit::set_ramp(const Vector<float> &p_offsets, const Vector<Color> &p_colors) {
ERR_FAIL_COND(p_offsets.size() != p_colors.size());
points.clear();
for (int i = 0; i < p_offsets.size(); i++) {
GradientTexture::Point p;
p.offset = p_offsets[i];
p.color = p_colors[i];
points.push_back(p);
}
points.sort();
update();
}
Vector<float> GradientTextureEdit::get_offsets() const {
Vector<float> ret;
for (int i = 0; i < points.size(); i++)
ret.push_back(points[i].offset);
return ret;
}
Vector<Color> GradientTextureEdit::get_colors() const {
Vector<Color> ret;
for (int i = 0; i < points.size(); i++)
ret.push_back(points[i].color);
return ret;
}
void GradientTextureEdit::set_points(Vector<GradientTexture::Point> &p_points) {
if (points.size() != p_points.size())
grabbed = -1;
points.clear();
points = p_points;
}
Vector<GradientTexture::Point> &GradientTextureEdit::get_points() {
return points;
}
void GradientTextureEdit::_bind_methods() {
ClassDB::bind_method(D_METHOD("_gui_input"), &GradientTextureEdit::_gui_input);
ClassDB::bind_method(D_METHOD("_color_changed"), &GradientTextureEdit::_color_changed);
ADD_SIGNAL(MethodInfo("ramp_changed"));
}
GradientTextureEditorPlugin::GradientTextureEditorPlugin(EditorNode *p_node) {
editor = p_node;
ramp_editor = memnew(GradientTextureEdit);
gradient_button = editor->add_bottom_panel_item("GradientTexture", ramp_editor);
gradient_button->hide();
ramp_editor->set_custom_minimum_size(Size2(100, 100 * EDSCALE));
ramp_editor->hide();
ramp_editor->connect("ramp_changed", this, "ramp_changed");
}
void GradientTextureEditorPlugin::edit(Object *p_object) {
GradientTexture *gradient_texture = p_object->cast_to<GradientTexture>();
if (!gradient_texture)
return;
gradient_texture_ref = Ref<GradientTexture>(gradient_texture);
ramp_editor->set_points(gradient_texture_ref->get_points());
}
bool GradientTextureEditorPlugin::handles(Object *p_object) const {
return p_object->is_class("GradientTexture");
}
void GradientTextureEditorPlugin::make_visible(bool p_visible) {
if (p_visible) {
gradient_button->show();
editor->make_bottom_panel_item_visible(ramp_editor);
} else {
gradient_button->hide();
if (ramp_editor->is_visible_in_tree())
editor->hide_bottom_panel();
}
}
void GradientTextureEditorPlugin::_ramp_changed() {
if (gradient_texture_ref.is_valid()) {
UndoRedo *ur = EditorNode::get_singleton()->get_undo_redo();
//Not sure if I should convert this data to PoolVector
Vector<float> new_offsets = ramp_editor->get_offsets();
Vector<Color> new_colors = ramp_editor->get_colors();
Vector<float> old_offsets = gradient_texture_ref->get_offsets();
Vector<Color> old_colors = gradient_texture_ref->get_colors();
if (old_offsets.size() != new_offsets.size())
ur->create_action(TTR("Add/Remove Color Ramp Point"));
else
ur->create_action(TTR("Modify Color Ramp"), UndoRedo::MERGE_ENDS);
ur->add_do_method(this, "undo_redo_gradient_texture", new_offsets, new_colors);
ur->add_undo_method(this, "undo_redo_gradient_texture", old_offsets, old_colors);
ur->commit_action();
//gradient_texture_ref->set_points(ramp_editor->get_points());
}
}
void GradientTextureEditorPlugin::_undo_redo_gradient_texture(const Vector<float> &offsets,
const Vector<Color> &colors) {
gradient_texture_ref->set_offsets(offsets);
gradient_texture_ref->set_colors(colors);
ramp_editor->set_points(gradient_texture_ref->get_points());
ramp_editor->update();
}
GradientTextureEditorPlugin::~GradientTextureEditorPlugin() {
}
void GradientTextureEditorPlugin::_bind_methods() {
ClassDB::bind_method(D_METHOD("ramp_changed"), &GradientTextureEditorPlugin::_ramp_changed);
ClassDB::bind_method(D_METHOD("undo_redo_gradient_texture", "offsets", "colors"), &GradientTextureEditorPlugin::_undo_redo_gradient_texture);
}
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