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Overhaul the Gradient Editor

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This commit is contained in:
MewPurPur 2023-01-20 17:01:37 +01:00
parent fe5b1c8d49
commit 7b86969719
5 changed files with 698 additions and 617 deletions
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476
editor/plugins/gradient_editor.cpp
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@ -1,476 +0,0 @@
/**************************************************************************/
/* gradient_editor.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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_editor.h"
#include "core/os/keyboard.h"
#include "editor/editor_node.h"
#include "editor/editor_scale.h"
#include "editor/editor_string_names.h"
#include "editor/editor_undo_redo_manager.h"
#include "scene/resources/gradient_texture.h"
void GradientEditor::set_gradient(const Ref<Gradient> &p_gradient) {
gradient = p_gradient;
connect("ramp_changed", callable_mp(this, &GradientEditor::_ramp_changed));
gradient->connect_changed(callable_mp(this, &GradientEditor::_gradient_changed));
set_points(gradient->get_points());
set_interpolation_mode(gradient->get_interpolation_mode());
set_interpolation_color_space(gradient->get_interpolation_color_space());
}
void GradientEditor::reverse_gradient() {
gradient->reverse();
set_points(gradient->get_points());
emit_signal(SNAME("ramp_changed"));
queue_redraw();
}
int GradientEditor::_get_point_from_pos(int x) {
int result = -1;
int total_w = get_size().width - get_size().height - draw_spacing - handle_width;
float min_distance = 1e20;
for (int i = 0; i < points.size(); i++) {
// Check if we clicked at point.
float distance = ABS(x - points[i].offset * total_w);
float min = handle_width * 0.85; // Allow the mouse to be more than half a handle width away for ease of grabbing.
if (distance <= min && distance < min_distance) {
result = i;
min_distance = distance;
}
}
return result;
}
void GradientEditor::_show_color_picker() {
if (grabbed == -1) {
return;
}
picker->set_pick_color(points[grabbed].color);
Size2 minsize = popup->get_contents_minimum_size();
bool show_above = false;
if (get_global_position().y + get_size().y + minsize.y > get_viewport_rect().size.y) {
show_above = true;
}
if (show_above) {
popup->set_position(get_screen_position() - Vector2(0, minsize.y));
} else {
popup->set_position(get_screen_position() + Vector2(0, get_size().y));
}
popup->popup();
}
void GradientEditor::_gradient_changed() {
if (editing) {
return;
}
editing = true;
Vector<Gradient::Point> grad_points = gradient->get_points();
set_points(grad_points);
set_interpolation_mode(gradient->get_interpolation_mode());
set_interpolation_color_space(gradient->get_interpolation_color_space());
queue_redraw();
editing = false;
}
void GradientEditor::_ramp_changed() {
editing = true;
EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
undo_redo->create_action(TTR("Gradient Edited"), UndoRedo::MERGE_ENDS);
undo_redo->add_do_method(gradient.ptr(), "set_offsets", get_offsets());
undo_redo->add_do_method(gradient.ptr(), "set_colors", get_colors());
undo_redo->add_do_method(gradient.ptr(), "set_interpolation_mode", get_interpolation_mode());
undo_redo->add_do_method(gradient.ptr(), "set_interpolation_color_space", get_interpolation_color_space());
undo_redo->add_undo_method(gradient.ptr(), "set_offsets", gradient->get_offsets());
undo_redo->add_undo_method(gradient.ptr(), "set_colors", gradient->get_colors());
undo_redo->add_undo_method(gradient.ptr(), "set_interpolation_mode", gradient->get_interpolation_mode());
undo_redo->add_undo_method(gradient.ptr(), "set_interpolation_color_space", gradient->get_interpolation_color_space());
undo_redo->commit_action();
editing = false;
}
void GradientEditor::_color_changed(const Color &p_color) {
if (grabbed == -1) {
return;
}
points.write[grabbed].color = p_color;
queue_redraw();
emit_signal(SNAME("ramp_changed"));
}
void GradientEditor::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++) {
Gradient::Point p;
p.offset = p_offsets[i];
p.color = p_colors[i];
points.push_back(p);
}
points.sort();
queue_redraw();
}
Vector<float> GradientEditor::get_offsets() const {
Vector<float> ret;
for (int i = 0; i < points.size(); i++) {
ret.push_back(points[i].offset);
}
return ret;
}
Vector<Color> GradientEditor::get_colors() const {
Vector<Color> ret;
for (int i = 0; i < points.size(); i++) {
ret.push_back(points[i].color);
}
return ret;
}
void GradientEditor::set_points(Vector<Gradient::Point> &p_points) {
if (points.size() != p_points.size()) {
grabbed = -1;
}
points.clear();
points = p_points;
points.sort();
}
Vector<Gradient::Point> &GradientEditor::get_points() {
return points;
}
void GradientEditor::set_interpolation_mode(Gradient::InterpolationMode p_interp_mode) {
interpolation_mode = p_interp_mode;
}
Gradient::InterpolationMode GradientEditor::get_interpolation_mode() {
return interpolation_mode;
}
void GradientEditor::set_interpolation_color_space(Gradient::ColorSpace p_color_space) {
interpolation_color_space = p_color_space;
}
Gradient::ColorSpace GradientEditor::get_interpolation_color_space() {
return interpolation_color_space;
}
ColorPicker *GradientEditor::get_picker() {
return picker;
}
PopupPanel *GradientEditor::get_popup() {
return popup;
}
Size2 GradientEditor::get_minimum_size() const {
return Size2(0, 60) * EDSCALE;
}
void GradientEditor::gui_input(const Ref<InputEvent> &p_event) {
ERR_FAIL_COND(p_event.is_null());
Ref<InputEventKey> k = p_event;
if (k.is_valid() && k->is_pressed() && k->get_keycode() == Key::KEY_DELETE && grabbed != -1) {
points.remove_at(grabbed);
grabbed = -1;
grabbing = false;
queue_redraw();
emit_signal(SNAME("ramp_changed"));
accept_event();
}
Ref<InputEventMouseButton> mb = p_event;
if (mb.is_valid() && mb->is_pressed()) {
float adjusted_mb_x = mb->get_position().x - handle_width / 2;
// Delete point on right click.
if (mb->get_button_index() == MouseButton::RIGHT) {
grabbed = _get_point_from_pos(adjusted_mb_x);
if (grabbed != -1) {
points.remove_at(grabbed);
grabbed = -1;
grabbing = false;
queue_redraw();
emit_signal(SNAME("ramp_changed"));
accept_event();
}
}
// Hold Alt key to duplicate selected color.
if (mb->get_button_index() == MouseButton::LEFT && mb->is_alt_pressed()) {
grabbed = _get_point_from_pos(adjusted_mb_x);
if (grabbed != -1) {
int total_w = get_size().width - get_size().height - draw_spacing - handle_width;
Gradient::Point new_point = points[grabbed];
new_point.offset = CLAMP(adjusted_mb_x / float(total_w), 0, 1);
points.push_back(new_point);
points.sort();
for (int i = 0; i < points.size(); ++i) {
if (points[i].offset == new_point.offset) {
grabbed = i;
break;
}
}
emit_signal(SNAME("ramp_changed"));
queue_redraw();
}
}
// Select.
if (mb->get_button_index() == MouseButton::LEFT) {
queue_redraw();
int total_w = get_size().width - get_size().height - draw_spacing - handle_width;
// Check if color selector was clicked or ramp was double-clicked.
if (adjusted_mb_x > total_w + draw_spacing) {
if (!mb->is_double_click()) {
_show_color_picker();
}
return;
} else if (mb->is_double_click()) {
grabbed = _get_point_from_pos(adjusted_mb_x);
_show_color_picker();
accept_event();
return;
}
grabbing = true;
grabbed = _get_point_from_pos(adjusted_mb_x);
// Grab or select.
if (grabbed != -1) {
return;
}
// Insert point.
Gradient::Point new_point;
new_point.offset = CLAMP(adjusted_mb_x / float(total_w), 0, 1);
new_point.color = gradient->get_color_at_offset(new_point.offset);
points.push_back(new_point);
points.sort();
for (int i = 0; i < points.size(); i++) {
if (points[i].offset == new_point.offset) {
grabbed = i;
break;
}
}
emit_signal(SNAME("ramp_changed"));
}
}
if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && !mb->is_pressed()) {
if (grabbing) {
grabbing = false;
emit_signal(SNAME("ramp_changed"));
}
queue_redraw();
}
Ref<InputEventMouseMotion> mm = p_event;
if (mm.is_valid() && grabbing) {
float adjusted_mm_x = mm->get_position().x - handle_width / 2;
int total_w = get_size().width - get_size().height - draw_spacing - handle_width;
float newofs = CLAMP(adjusted_mm_x / float(total_w), 0, 1);
// Snap to "round" coordinates if holding Ctrl.
// Be more precise if holding Shift as well.
if (mm->is_command_or_control_pressed()) {
newofs = Math::snapped(newofs, mm->is_shift_pressed() ? 0.025 : 0.1);
} else if (mm->is_shift_pressed()) {
// Snap to nearest point if holding just Shift.
const float snap_threshold = 0.03;
float smallest_ofs = snap_threshold;
bool found = false;
int nearest_point = 0;
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 (found) {
break;
}
found = true;
}
}
}
if (found) {
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;
break;
}
}
if (!valid || grabbed == -1) {
return;
}
points.write[grabbed].offset = newofs;
points.sort();
for (int i = 0; i < points.size(); i++) {
if (points[i].offset == newofs) {
grabbed = i;
break;
}
}
emit_signal(SNAME("ramp_changed"));
queue_redraw();
}
}
void GradientEditor::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_ENTER_TREE: {
if (!picker->is_connected("color_changed", callable_mp(this, &GradientEditor::_color_changed))) {
picker->connect("color_changed", callable_mp(this, &GradientEditor::_color_changed));
}
[[fallthrough]];
}
case NOTIFICATION_THEME_CHANGED: {
draw_spacing = BASE_SPACING * get_theme_default_base_scale();
handle_width = BASE_HANDLE_WIDTH * get_theme_default_base_scale();
} break;
case 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 - draw_spacing - handle_width;
// Draw checker pattern for ramp.
draw_texture_rect(get_editor_theme_icon(SNAME("GuiMiniCheckerboard")), Rect2(handle_width / 2, 0, total_w, h), true);
// Draw color ramp.
gradient_cache->set_points(points);
gradient_cache->set_interpolation_mode(interpolation_mode);
gradient_cache->set_interpolation_color_space(interpolation_color_space);
preview_texture->set_gradient(gradient_cache);
draw_texture_rect(preview_texture, Rect2(handle_width / 2, 0, total_w, h));
// Draw borders around color ramp if in focus.
if (has_focus()) {
draw_rect(Rect2(handle_width / 2, 0, total_w, h), Color(1, 1, 1, 0.9), false, 1);
}
// Draw point markers.
for (int i = 0; i < points.size(); i++) {
Color col = points[i].color.get_v() > 0.5 ? Color(0, 0, 0) : Color(1, 1, 1);
col.a = 0.9;
draw_line(Vector2(points[i].offset * total_w + handle_width / 2, 0), Vector2(points[i].offset * total_w + handle_width / 2, h / 2), col);
Rect2 rect = Rect2(points[i].offset * total_w, h / 2, handle_width, h / 2);
draw_rect(rect, points[i].color, true);
draw_rect(rect, col, false, 1);
if (grabbed == i) {
const Color focus_color = get_theme_color(SNAME("accent_color"), EditorStringName(Editor));
rect = rect.grow(-1);
if (has_focus()) {
draw_rect(rect, focus_color, false, 1);
} else {
draw_rect(rect, focus_color.darkened(0.4), false, 1);
}
rect = rect.grow(-1);
draw_rect(rect, col, false, 1);
}
}
// Draw "button" for color selector.
int button_offset = total_w + handle_width + draw_spacing;
draw_texture_rect(get_editor_theme_icon(SNAME("GuiMiniCheckerboard")), Rect2(button_offset, 0, h, h), true);
if (grabbed != -1) {
// Draw with selection color.
draw_rect(Rect2(button_offset, 0, h, h), points[grabbed].color);
} else {
// If no color selected draw gray color with 'X' on top.
draw_rect(Rect2(button_offset, 0, h, h), Color(0.5, 0.5, 0.5, 1));
draw_line(Vector2(button_offset, 0), Vector2(button_offset + h, h), Color(1, 1, 1, 0.6));
draw_line(Vector2(button_offset, h), Vector2(button_offset + h, 0), Color(1, 1, 1, 0.6));
}
} break;
case NOTIFICATION_VISIBILITY_CHANGED: {
if (!is_visible()) {
grabbing = false;
}
} break;
}
}
void GradientEditor::_bind_methods() {
ADD_SIGNAL(MethodInfo("ramp_changed"));
}
GradientEditor::GradientEditor() {
set_focus_mode(FOCUS_ALL);
popup = memnew(PopupPanel);
picker = memnew(ColorPicker);
popup->add_child(picker);
popup->connect("about_to_popup", callable_mp(EditorNode::get_singleton(), &EditorNode::setup_color_picker).bind(GradientEditor::get_picker()));
gradient_cache.instantiate();
preview_texture.instantiate();
preview_texture->set_width(1024);
add_child(popup, false, INTERNAL_MODE_FRONT);
}
GradientEditor::~GradientEditor() {
}

102
editor/plugins/gradient_editor.h
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@ -1,102 +0,0 @@
/**************************************************************************/
/* gradient_editor.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#ifndef GRADIENT_EDITOR_H
#define GRADIENT_EDITOR_H
#include "scene/gui/color_picker.h"
#include "scene/gui/popup.h"
#include "scene/resources/gradient.h"
class GradientTexture1D;
class GradientEditor : public Control {
GDCLASS(GradientEditor, Control);
PopupPanel *popup = nullptr;
ColorPicker *picker = nullptr;
bool grabbing = false;
int grabbed = -1;
Vector<Gradient::Point> points;
Gradient::InterpolationMode interpolation_mode = Gradient::GRADIENT_INTERPOLATE_LINEAR;
Gradient::ColorSpace interpolation_color_space = Gradient::GRADIENT_COLOR_SPACE_SRGB;
bool editing = false;
Ref<Gradient> gradient;
Ref<Gradient> gradient_cache;
Ref<GradientTexture1D> preview_texture;
// Make sure to use the scaled value below.
const int BASE_SPACING = 3;
const int BASE_HANDLE_WIDTH = 8;
int draw_spacing = BASE_SPACING;
int handle_width = BASE_HANDLE_WIDTH;
void _gradient_changed();
void _ramp_changed();
void _color_changed(const Color &p_color);
int _get_point_from_pos(int x);
void _show_color_picker();
protected:
virtual void gui_input(const Ref<InputEvent> &p_event) override;
void _notification(int p_what);
static void _bind_methods();
public:
void set_gradient(const Ref<Gradient> &p_gradient);
void reverse_gradient();
void set_ramp(const Vector<float> &p_offsets, const Vector<Color> &p_colors);
Vector<float> get_offsets() const;
Vector<Color> get_colors() const;
void set_points(Vector<Gradient::Point> &p_points);
Vector<Gradient::Point> &get_points();
void set_interpolation_mode(Gradient::InterpolationMode p_interp_mode);
Gradient::InterpolationMode get_interpolation_mode();
void set_interpolation_color_space(Gradient::ColorSpace p_color_space);
Gradient::ColorSpace get_interpolation_color_space();
ColorPicker *get_picker();
PopupPanel *get_popup();
virtual Size2 get_minimum_size() const override;
GradientEditor();
virtual ~GradientEditor();
};
#endif // GRADIENT_EDITOR_H

635
editor/plugins/gradient_editor_plugin.cpp
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@ -31,27 +31,624 @@
#include "gradient_editor_plugin.h"
#include "canvas_item_editor_plugin.h"
#include "core/os/keyboard.h"
#include "editor/editor_node.h"
#include "editor/editor_scale.h"
#include "editor/editor_settings.h"
#include "editor/editor_string_names.h"
#include "editor/editor_undo_redo_manager.h"
#include "editor/gui/editor_spin_slider.h"
#include "node_3d_editor_plugin.h"
#include "scene/gui/color_picker.h"
#include "scene/gui/flow_container.h"
#include "scene/gui/popup.h"
#include "scene/gui/separator.h"
#include "scene/resources/gradient_texture.h"
void GradientReverseButton::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_DRAW: {
Ref<Texture2D> icon = get_editor_theme_icon(SNAME("ReverseGradient"));
if (is_pressed()) {
draw_texture_rect(icon, Rect2(margin, margin, icon->get_width(), icon->get_height()), false, get_theme_color(SNAME("icon_pressed_color"), SNAME("Button")));
int GradientEdit::_get_point_at(int p_xpos) const {
int result = -1;
int total_w = _get_gradient_rect_width();
float min_distance = handle_width * 0.8; // Allow the cursor to be more than half a handle width away for ease of use.
for (int i = 0; i < gradient->get_point_count(); i++) {
// Ignore points outside of [0, 1].
if (gradient->get_offset(i) < 0) {
continue;
} else if (gradient->get_offset(i) > 1) {
break;
}
// Check if we clicked at point.
float distance = ABS(p_xpos - gradient->get_offset(i) * total_w);
if (distance < min_distance) {
result = i;
min_distance = distance;
}
}
return result;
}
int GradientEdit::_predict_insertion_index(float p_offset) {
int result = 0;
while (result < gradient->get_point_count() && gradient->get_offset(result) < p_offset) {
result++;
}
return result;
}
int GradientEdit::_get_gradient_rect_width() const {
return get_size().width - get_size().height - draw_spacing - handle_width;
}
void GradientEdit::_show_color_picker() {
if (selected_index == -1) {
return;
}
picker->set_pick_color(gradient->get_color(selected_index));
Size2 minsize = popup->get_contents_minimum_size();
float viewport_height = get_viewport_rect().size.y;
// Determine in which direction to show the popup. By default popup below.
// But if the popup doesn't fit below and the Gradient Editor is in the bottom half of the viewport, show above.
bool show_above = get_global_position().y + get_size().y + minsize.y > viewport_height && get_global_position().y * 2 + get_size().y > viewport_height;
float v_offset = show_above ? -minsize.y : get_size().y;
popup->set_position(get_screen_position() + Vector2(0, v_offset));
popup->popup();
}
void GradientEdit::_color_changed(const Color &p_color) {
set_color(selected_index, p_color);
}
void GradientEdit::set_gradient(const Ref<Gradient> &p_gradient) {
gradient = p_gradient;
gradient->connect("changed", callable_mp((CanvasItem *)this, &CanvasItem::queue_redraw));
}
const Ref<Gradient> &GradientEdit::get_gradient() const {
return gradient;
}
void GradientEdit::add_point(float p_offset, const Color &p_color) {
int new_idx = _predict_insertion_index(p_offset);
EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
undo_redo->create_action(TTR("Add Gradient Point"));
undo_redo->add_do_method(*gradient, "add_point", p_offset, p_color);
undo_redo->add_do_method(this, "set_selected_index", new_idx);
undo_redo->add_undo_method(*gradient, "remove_point", new_idx);
undo_redo->add_undo_method(this, "set_selected_index", -1);
undo_redo->commit_action();
}
void GradientEdit::remove_point(int p_index) {
ERR_FAIL_INDEX_MSG(p_index, gradient->get_point_count(), "Gradient point is out of bounds.");
if (gradient->get_point_count() <= 1) {
return;
}
// If the point is removed while it's being moved, remember its old offset.
float old_offset = (grabbing == GRAB_MOVE) ? pre_grab_offset : gradient->get_offset(p_index);
Color old_color = gradient->get_color(p_index);
int new_selected_index = selected_index;
// Reselect the old selected point if it's not the deleted one.
if (new_selected_index > p_index) {
new_selected_index -= 1;
} else if (new_selected_index == p_index) {
new_selected_index = -1;
}
EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
undo_redo->create_action(TTR("Remove Gradient Point"));
undo_redo->add_do_method(*gradient, "remove_point", p_index);
undo_redo->add_do_method(this, "set_selected_index", new_selected_index);
undo_redo->add_undo_method(*gradient, "add_point", old_offset, old_color);
undo_redo->add_undo_method(this, "set_selected_index", selected_index);
undo_redo->commit_action();
}
void GradientEdit::set_offset(int p_index, float p_offset) {
ERR_FAIL_INDEX_MSG(p_index, gradient->get_point_count(), "Gradient point is out of bounds.");
// Use pre_grab_offset to determine things for the undo/redo.
if (Math::is_equal_approx(pre_grab_offset, p_offset)) {
return;
}
int new_idx = _predict_insertion_index(p_offset);
gradient->set_offset(p_index, pre_grab_offset); // Pretend the point started from its old place.
EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
undo_redo->create_action(TTR("Move Gradient Point"));
undo_redo->add_do_method(*gradient, "set_offset", pre_grab_index, p_offset);
undo_redo->add_do_method(this, "set_selected_index", new_idx);
undo_redo->add_undo_method(*gradient, "set_offset", new_idx, pre_grab_offset);
undo_redo->add_undo_method(this, "set_selected_index", pre_grab_index);
undo_redo->commit_action();
queue_redraw();
}
void GradientEdit::set_color(int p_index, const Color &p_color) {
ERR_FAIL_INDEX_MSG(p_index, gradient->get_point_count(), "Gradient point is out of bounds.");
Color old_color = gradient->get_color(p_index);
if (old_color == p_color) {
return;
}
EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
undo_redo->create_action(TTR("Recolor Gradient Point"), UndoRedo::MERGE_ENDS);
undo_redo->add_do_method(*gradient, "set_color", p_index, p_color);
undo_redo->add_undo_method(*gradient, "set_color", p_index, old_color);
undo_redo->commit_action();
queue_redraw();
}
void GradientEdit::reverse_gradient() {
int new_selected_idx = (selected_index == -1) ? -1 : (gradient->get_point_count() - selected_index - 1);
EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
undo_redo->create_action(TTR("Reverse Gradient"), UndoRedo::MERGE_DISABLE, *gradient);
undo_redo->add_do_method(*gradient, "reverse");
undo_redo->add_do_method(this, "set_selected_index", new_selected_idx);
undo_redo->add_undo_method(*gradient, "reverse");
undo_redo->add_undo_method(this, "set_selected_index", selected_index);
undo_redo->commit_action();
}
void GradientEdit::set_selected_index(int p_index) {
selected_index = p_index;
queue_redraw();
}
void GradientEdit::set_snap_enabled(bool p_enabled) {
snap_enabled = p_enabled;
queue_redraw();
if (gradient.is_valid()) {
if (snap_enabled) {
gradient->set_meta(SNAME("_snap_enabled"), true);
} else {
gradient->remove_meta(SNAME("_snap_enabled"));
}
}
}
void GradientEdit::set_snap_count(int p_count) {
snap_count = p_count;
queue_redraw();
if (gradient.is_valid()) {
if (snap_count != GradientEditor::DEFAULT_SNAP) {
gradient->set_meta(SNAME("_snap_count"), snap_count);
} else {
gradient->remove_meta(SNAME("_snap_count"));
}
}
}
ColorPicker *GradientEdit::get_picker() const {
return picker;
}
PopupPanel *GradientEdit::get_popup() const {
return popup;
}
void GradientEdit::gui_input(const Ref<InputEvent> &p_event) {
ERR_FAIL_COND(p_event.is_null());
Ref<InputEventKey> k = p_event;
if (k.is_valid() && k->is_pressed() && k->get_keycode() == Key::KEY_DELETE && selected_index != -1) {
if (grabbing == GRAB_ADD) {
gradient->remove_point(selected_index); // Point is temporary, so remove directly from gradient.
set_selected_index(-1);
} else {
remove_point(selected_index);
}
grabbing = GRAB_NONE;
hovered_index = -1;
accept_event();
}
Ref<InputEventMouseButton> mb = p_event;
if (mb.is_valid() && mb->is_pressed()) {
float adjusted_mb_x = mb->get_position().x - handle_width / 2;
bool should_snap = snap_enabled || mb->is_ctrl_pressed();
// Delete point or move it to old position on middle or right click.
if (mb->get_button_index() == MouseButton::RIGHT || mb->get_button_index() == MouseButton::MIDDLE) {
if (grabbing == GRAB_MOVE && mb->get_button_index() == MouseButton::RIGHT) {
gradient->set_offset(selected_index, pre_grab_offset);
set_selected_index(pre_grab_index);
} else {
draw_texture_rect(icon, Rect2(margin, margin, icon->get_width(), icon->get_height()));
int point_to_remove = _get_point_at(adjusted_mb_x);
if (point_to_remove == -1) {
set_selected_index(-1); // Nothing on the place of the click, just deselect any handle.
} else {
if (grabbing == GRAB_ADD) {
gradient->remove_point(point_to_remove); // Point is temporary, so remove directly from gradient.
set_selected_index(-1);
} else {
remove_point(point_to_remove);
}
hovered_index = -1;
}
}
grabbing = GRAB_NONE;
accept_event();
}
// Select point.
if (mb->get_button_index() == MouseButton::LEFT) {
int total_w = _get_gradient_rect_width();
// Check if color picker was clicked or gradient was double-clicked.
if (adjusted_mb_x > total_w + draw_spacing) {
if (!mb->is_double_click()) {
_show_color_picker();
}
accept_event();
return;
} else if (mb->is_double_click()) {
set_selected_index(_get_point_at(adjusted_mb_x));
_show_color_picker();
accept_event();
return;
}
if (grabbing == GRAB_NONE) {
set_selected_index(_get_point_at(adjusted_mb_x));
}
if (selected_index != -1 && !mb->is_alt_pressed()) {
// An existing point was grabbed.
grabbing = GRAB_MOVE;
pre_grab_offset = gradient->get_offset(selected_index);
pre_grab_index = selected_index;
} else if (grabbing == GRAB_NONE) {
// Adding a new point. Insert a temporary point for the user to adjust, so it's not in the undo/redo.
float new_offset = CLAMP(adjusted_mb_x / float(total_w), 0, 1);
if (should_snap) {
new_offset = Math::snapped(new_offset, 1.0 / snap_count);
}
for (int i = 0; i < gradient->get_point_count(); i++) {
if (gradient->get_offset(i) == new_offset) {
// If another point with the same offset is found, then
// tweak it if Alt was pressed, otherwise something has gone wrong, so stop the operation.
if (mb->is_alt_pressed()) {
new_offset = MIN(gradient->get_offset(i) + 0.00001, 1);
} else {
return;
}
}
}
Color new_color = gradient->get_color_at_offset(new_offset);
if (mb->is_alt_pressed()) {
// Alt + Click on a point duplicates it. So copy its color.
int point_to_copy = _get_point_at(adjusted_mb_x);
if (point_to_copy != -1) {
new_color = gradient->get_color(point_to_copy);
}
}
// Add a temporary point for the user to adjust before adding it permanently.
gradient->add_point(new_offset, new_color);
set_selected_index(_predict_insertion_index(new_offset));
grabbing = GRAB_ADD;
}
}
}
if (mb.is_valid() && mb->get_button_index() == MouseButton::LEFT && !mb->is_pressed()) {
if (grabbing == GRAB_MOVE) {
// Finish moving a point.
set_offset(selected_index, gradient->get_offset(selected_index));
grabbing = GRAB_NONE;
} else if (grabbing == GRAB_ADD) {
// Finish inserting a new point. Remove the temporary point and insert the permanent one in its place.
float new_offset = gradient->get_offset(selected_index);
Color new_color = gradient->get_color(selected_index);
gradient->remove_point(selected_index);
add_point(new_offset, new_color);
grabbing = GRAB_NONE;
}
}
Ref<InputEventMouseMotion> mm = p_event;
if (mm.is_valid()) {
int total_w = _get_gradient_rect_width();
float adjusted_mm_x = mm->get_position().x - handle_width / 2;
bool should_snap = snap_enabled || mm->is_ctrl_pressed();
// Hovering logic.
if (grabbing == GRAB_NONE) {
int nearest_point = _get_point_at(adjusted_mm_x);
if (hovered_index != nearest_point) {
hovered_index = nearest_point;
queue_redraw();
}
return;
} else {
hovered_index = -1;
}
// Grabbing logic.
float new_offset = CLAMP(adjusted_mm_x / float(total_w), 0, 1);
// Give the ability to snap right next to a point when using Shift.
if (mm->is_shift_pressed()) {
float smallest_offset = should_snap ? (0.5 / snap_count) : 0.01;
int nearest_idx = -1;
// Only check the two adjacent points to find which one is the nearest.
if (selected_index > 0) {
float temp_offset = ABS(gradient->get_offset(selected_index - 1) - new_offset);
if (temp_offset < smallest_offset) {
smallest_offset = temp_offset;
nearest_idx = selected_index - 1;
}
}
if (selected_index < gradient->get_point_count() - 1) {
float temp_offset = ABS(gradient->get_offset(selected_index + 1) - new_offset);
if (temp_offset < smallest_offset) {
smallest_offset = temp_offset;
nearest_idx = selected_index + 1;
}
}
if (nearest_idx != -1) {
// Snap to the point with a slight adjustment to the left or right.
float adjustment = gradient->get_offset(nearest_idx) < new_offset ? 0.00001 : -0.00001;
new_offset = CLAMP(gradient->get_offset(nearest_idx) + adjustment, 0, 1);
} else if (should_snap) {
new_offset = Math::snapped(new_offset, 1.0 / snap_count);
}
} else if (should_snap) {
// Shift is not pressed, so snap fully without adjustments.
new_offset = Math::snapped(new_offset, 1.0 / snap_count);
}
// Don't move the point if its new offset would be the same as another point's.
for (int i = 0; i < gradient->get_point_count(); i++) {
if (gradient->get_offset(i) == new_offset && i != selected_index) {
return;
}
}
if (selected_index == -1) {
return;
}
// We want to only save this action for undo/redo when released, so don't use set_offset() yet.
gradient->set_offset(selected_index, new_offset);
// Update selected_index after the gradient updates its indices, so you keep holding the same color.
for (int i = 0; i < gradient->get_point_count(); i++) {
if (gradient->get_offset(i) == new_offset) {
set_selected_index(i);
break;
}
}
}
}
void GradientEdit::_redraw() {
int w = get_size().x;
int h = get_size().y - draw_spacing; // A bit of spacing below the gradient too.
if (w == 0 || h == 0) {
return; // Safety check as there is nothing to draw with such size.
}
int total_w = _get_gradient_rect_width();
int half_handle_width = handle_width * 0.5;
// Draw gradient.
draw_texture_rect(get_editor_theme_icon(SNAME("GuiMiniCheckerboard")), Rect2(half_handle_width, 0, total_w, h), true);
preview_texture->set_gradient(gradient);
draw_texture_rect(preview_texture, Rect2(half_handle_width, 0, total_w, h));
// Draw vertical snap lines.
if (snap_enabled || (Input::get_singleton()->is_key_pressed(Key::CTRL) && grabbing != GRAB_NONE)) {
const Color line_color = Color(0.5, 0.5, 0.5, 0.5);
for (int idx = 1; idx < snap_count; idx++) {
float offset_x = idx * total_w / (float)snap_count + half_handle_width;
draw_line(Point2(offset_x, 0), Point2(offset_x, h), line_color);
}
}
// Draw handles.
for (int i = 0; i < gradient->get_point_count(); i++) {
// Only draw handles for points in [0, 1]. If there are points before or after, draw a little indicator.
if (gradient->get_offset(i) < 0.0) {
continue;
} else if (gradient->get_offset(i) > 1.0) {
break;
}
// White or black handle color, to contrast with the selected color's brightness.
// Also consider the fact that the color may be translucent.
// The checkerboard pattern in the background has an average luminance of 0.75.
Color inside_col = gradient->get_color(i);
Color border_col = Math::lerp(0.75f, inside_col.get_luminance(), inside_col.a) > 0.455 ? Color(0, 0, 0) : Color(1, 1, 1);
int handle_thickness = MAX(1, Math::round(EDSCALE));
float handle_x_pos = gradient->get_offset(i) * total_w + half_handle_width;
float handle_start_x = handle_x_pos - half_handle_width;
Rect2 rect = Rect2(handle_start_x, h / 2, handle_width, h / 2);
if (inside_col.a < 1) {
// If the color is translucent, draw a little opaque rectangle at the bottom to more easily see it.
draw_texture_rect(get_editor_theme_icon(SNAME("GuiMiniCheckerboard")), rect, true);
draw_rect(rect, inside_col, true);
Color inside_col_opaque = inside_col;
inside_col_opaque.a = 1.0;
draw_rect(Rect2(handle_start_x + handle_thickness / 2.0, h * 0.9 - handle_thickness / 2.0, handle_width - handle_thickness, h * 0.1), inside_col_opaque, true);
} else {
draw_rect(rect, inside_col, true);
}
if (selected_index == i) {
// Handle is selected.
draw_rect(rect, border_col, false, handle_thickness);
draw_line(Vector2(handle_x_pos, 0), Vector2(handle_x_pos, h / 2 - handle_thickness), border_col, handle_thickness);
if (inside_col.a < 1) {
draw_line(Vector2(handle_start_x + handle_thickness / 2.0, h * 0.9 - handle_thickness), Vector2(handle_start_x + handle_width - handle_thickness / 2.0, h * 0.9 - handle_thickness), border_col, handle_thickness);
}
rect = rect.grow(-handle_thickness);
const Color focus_col = get_theme_color(SNAME("accent_color"), EditorStringName(Editor));
draw_rect(rect, has_focus() ? focus_col : focus_col.darkened(0.4), false, handle_thickness);
rect = rect.grow(-handle_thickness);
draw_rect(rect, border_col, false, handle_thickness);
} else {
// Handle isn't selected.
border_col.a = 0.9;
draw_rect(rect, border_col, false, handle_thickness);
draw_line(Vector2(handle_x_pos, 0), Vector2(handle_x_pos, h / 2 - handle_thickness), border_col, handle_thickness);
if (inside_col.a < 1) {
draw_line(Vector2(handle_start_x + handle_thickness / 2.0, h * 0.9 - handle_thickness), Vector2(handle_start_x + handle_width - handle_thickness / 2.0, h * 0.9 - handle_thickness), border_col, handle_thickness);
}
if (hovered_index == i) {
// Draw a subtle translucent rect inside the handle if it's being hovered.
rect = rect.grow(-handle_thickness);
border_col.a = 0.54;
draw_rect(rect, border_col, false, handle_thickness);
}
}
}
// Draw "button" for color selector.
int button_offset = total_w + handle_width + draw_spacing;
if (selected_index != -1) {
Color grabbed_col = gradient->get_color(selected_index);
if (grabbed_col.a < 1) {
draw_texture_rect(get_editor_theme_icon(SNAME("GuiMiniCheckerboard")), Rect2(button_offset, 0, h, h), true);
}
draw_rect(Rect2(button_offset, 0, h, h), grabbed_col);
if (grabbed_col.r > 1 || grabbed_col.g > 1 || grabbed_col.b > 1) {
// Draw an indicator to denote that the currently selected color is "overbright".
draw_texture(get_theme_icon(SNAME("overbright_indicator"), SNAME("ColorPicker")), Point2(button_offset, 0));
}
} else {
// If no color is selected, draw grey color with 'X' on top.
draw_rect(Rect2(button_offset, 0, h, h), Color(0.5, 0.5, 0.5, 1));
draw_line(Vector2(button_offset, 0), Vector2(button_offset + h, h), Color(0.8, 0.8, 0.8));
draw_line(Vector2(button_offset, h), Vector2(button_offset + h, 0), Color(0.8, 0.8, 0.8));
}
}
void GradientEdit::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_THEME_CHANGED: {
draw_spacing = BASE_SPACING * get_theme_default_base_scale();
handle_width = BASE_HANDLE_WIDTH * get_theme_default_base_scale();
} break;
case NOTIFICATION_DRAW: {
_redraw();
} break;
case NOTIFICATION_MOUSE_EXIT: {
if (hovered_index != -1) {
hovered_index = -1;
queue_redraw();
}
} break;
case NOTIFICATION_VISIBILITY_CHANGED: {
if (!is_visible()) {
grabbing = GRAB_NONE;
}
} break;
}
}
Size2 GradientReverseButton::get_minimum_size() const {
return (get_editor_theme_icon(SNAME("ReverseGradient"))->get_size() + Size2(margin * 2, margin * 2));
void GradientEdit::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_selected_index", "index"), &GradientEdit::set_selected_index);
}
GradientEdit::GradientEdit() {
set_focus_mode(FOCUS_ALL);
set_custom_minimum_size(Size2(0, 60) * EDSCALE);
picker = memnew(ColorPicker);
int picker_shape = EDITOR_GET("interface/inspector/default_color_picker_shape");
picker->set_picker_shape((ColorPicker::PickerShapeType)picker_shape);
picker->connect("color_changed", callable_mp(this, &GradientEdit::_color_changed));
popup = memnew(PopupPanel);
popup->connect("about_to_popup", callable_mp(EditorNode::get_singleton(), &EditorNode::setup_color_picker).bind(picker));
add_child(popup, false, INTERNAL_MODE_FRONT);
popup->add_child(picker);
preview_texture.instantiate();
preview_texture->set_width(1024);
}
///////////////////////
const int GradientEditor::DEFAULT_SNAP = 10;
void GradientEditor::_set_snap_enabled(bool p_enabled) {
gradient_editor_rect->set_snap_enabled(p_enabled);
snap_count_edit->set_visible(p_enabled);
}
void GradientEditor::_set_snap_count(int p_count) {
gradient_editor_rect->set_snap_count(CLAMP(p_count, 2, 100));
}
void GradientEditor::set_gradient(const Ref<Gradient> &p_gradient) {
gradient_editor_rect->set_gradient(p_gradient);
}
void GradientEditor::_notification(int p_what) {
switch (p_what) {
case NOTIFICATION_THEME_CHANGED: {
reverse_button->set_icon(get_editor_theme_icon(SNAME("ReverseGradient")));
snap_button->set_icon(get_editor_theme_icon(SNAME("SnapGrid")));
} break;
case NOTIFICATION_READY: {
Ref<Gradient> gradient = gradient_editor_rect->get_gradient();
if (gradient.is_valid()) {
// Set snapping settings based on the gradient's meta.
snap_button->set_pressed(gradient->get_meta("_snap_enabled", false));
snap_count_edit->set_value(gradient->get_meta("_snap_count", DEFAULT_SNAP));
}
} break;
}
}
GradientEditor::GradientEditor() {
HFlowContainer *toolbar = memnew(HFlowContainer);
add_child(toolbar);
reverse_button = memnew(Button);
reverse_button->set_tooltip_text(TTR("Reverse/Mirror Gradient"));
toolbar->add_child(reverse_button);
toolbar->add_child(memnew(VSeparator));
snap_button = memnew(Button);
snap_button->set_tooltip_text(TTR("Toggle Grid Snap"));
snap_button->set_toggle_mode(true);
toolbar->add_child(snap_button);
snap_button->connect("toggled", callable_mp(this, &GradientEditor::_set_snap_enabled));
snap_count_edit = memnew(EditorSpinSlider);
snap_count_edit->set_min(2);
snap_count_edit->set_max(100);
snap_count_edit->set_value(DEFAULT_SNAP);
snap_count_edit->set_custom_minimum_size(Size2(65 * EDSCALE, 0));
toolbar->add_child(snap_count_edit);
snap_count_edit->connect("value_changed", callable_mp(this, &GradientEditor::_set_snap_count));
gradient_editor_rect = memnew(GradientEdit);
add_child(gradient_editor_rect);
reverse_button->connect("pressed", callable_mp(gradient_editor_rect, &GradientEdit::reverse_gradient));
set_mouse_filter(MOUSE_FILTER_STOP);
_set_snap_enabled(snap_button->is_pressed());
_set_snap_count(snap_count_edit->get_value());
}
///////////////////////
@ -62,29 +659,15 @@ bool EditorInspectorPluginGradient::can_handle(Object *p_object) {
void EditorInspectorPluginGradient::parse_begin(Object *p_object) {
Gradient *gradient = Object::cast_to<Gradient>(p_object);
ERR_FAIL_COND(!gradient);
Ref<Gradient> g(gradient);
editor = memnew(GradientEditor);
GradientEditor *editor = memnew(GradientEditor);
editor->set_gradient(g);
add_custom_control(editor);
int picker_shape = EDITOR_GET("interface/inspector/default_color_picker_shape");
editor->get_picker()->set_picker_shape((ColorPicker::PickerShapeType)picker_shape);
reverse_btn = memnew(GradientReverseButton);
gradient_tools_hbox = memnew(HBoxContainer);
gradient_tools_hbox->add_child(reverse_btn);
add_custom_control(gradient_tools_hbox);
reverse_btn->connect("pressed", callable_mp(this, &EditorInspectorPluginGradient::_reverse_button_pressed));
reverse_btn->set_tooltip_text(TTR("Reverse/mirror gradient."));
}
void EditorInspectorPluginGradient::_reverse_button_pressed() {
editor->reverse_gradient();
}
///////////////////////
GradientEditorPlugin::GradientEditorPlugin() {
Ref<EditorInspectorPluginGradient> plugin;

98
editor/plugins/gradient_editor_plugin.h
View File

@ -33,26 +33,102 @@
#include "editor/editor_inspector.h"
#include "editor/editor_plugin.h"
#include "gradient_editor.h"
class GradientReverseButton : public BaseButton {
GDCLASS(GradientReverseButton, BaseButton);
class EditorSpinSlider;
class ColorPicker;
class PopupPanel;
class GradientTexture1D;
int margin = 2;
class GradientEdit : public Control {
GDCLASS(GradientEdit, Control);
Ref<Gradient> gradient;
Ref<GradientTexture1D> preview_texture;
PopupPanel *popup = nullptr;
ColorPicker *picker = nullptr;
bool snap_enabled = false;
int snap_count = 10;
enum GrabMode {
GRAB_NONE,
GRAB_ADD,
GRAB_MOVE
};
GrabMode grabbing = GRAB_NONE;
float pre_grab_offset = 0.5;
int pre_grab_index = -1;
int selected_index = -1;
int hovered_index = -1;
// Make sure to use the scaled values below.
const int BASE_SPACING = 4;
const int BASE_HANDLE_WIDTH = 8;
int draw_spacing = BASE_SPACING;
int handle_width = BASE_HANDLE_WIDTH;
int _get_gradient_rect_width() const;
void _color_changed(const Color &p_color);
void _redraw();
int _get_point_at(int p_xpos) const;
int _predict_insertion_index(float p_offset);
void _show_color_picker();
protected:
virtual void gui_input(const Ref<InputEvent> &p_event) override;
void _notification(int p_what);
virtual Size2 get_minimum_size() const override;
static void _bind_methods();
public:
void set_gradient(const Ref<Gradient> &p_gradient);
const Ref<Gradient> &get_gradient() const;
ColorPicker *get_picker() const;
PopupPanel *get_popup() const;
void set_selected_index(int p_index);
void add_point(float p_offset, const Color &p_color);
void remove_point(int p_index);
void set_offset(int p_index, float p_offset);
void set_color(int p_index, const Color &p_color);
void reverse_gradient();
void set_snap_enabled(bool p_enabled);
void set_snap_count(int p_count);
GradientEdit();
};
class GradientEditor : public VBoxContainer {
GDCLASS(GradientEditor, VBoxContainer);
Button *reverse_button = nullptr;
Button *snap_button = nullptr;
EditorSpinSlider *snap_count_edit = nullptr;
GradientEdit *gradient_editor_rect = nullptr;
void _set_snap_enabled(bool p_enabled);
void _set_snap_count(int p_count);
protected:
void _notification(int p_what);
public:
static const int DEFAULT_SNAP;
void set_gradient(const Ref<Gradient> &p_gradient);
GradientEditor();
};
class EditorInspectorPluginGradient : public EditorInspectorPlugin {
GDCLASS(EditorInspectorPluginGradient, EditorInspectorPlugin);
GradientEditor *editor = nullptr;
HBoxContainer *gradient_tools_hbox = nullptr;
GradientReverseButton *reverse_btn = nullptr;
void _reverse_button_pressed();
public:
virtual bool can_handle(Object *p_object) override;
virtual void parse_begin(Object *p_object) override;

4
scene/resources/gradient.h
View File

@ -55,8 +55,8 @@ public:
struct Point {
float offset = 0.0;
Color color;
bool operator<(const Point &p_ponit) const {
return offset < p_ponit.offset;
bool operator<(const Point &p_point) const {
return offset < p_point.offset;
}
};