godot/scene/gui/view_panner.cpp

137 lines
5.3 KiB
C++

/*************************************************************************/
/* view_panner.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 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 "view_panner.h"
#include "core/input/input.h"
#include "core/os/keyboard.h"
bool ViewPanner::gui_input(const Ref<InputEvent> &p_event, Rect2 p_canvas_rect) {
Ref<InputEventMouseButton> mb = p_event;
if (mb.is_valid()) {
Vector2i scroll_vec = Vector2((mb->get_button_index() == MouseButton::WHEEL_RIGHT) - (mb->get_button_index() == MouseButton::WHEEL_LEFT), (mb->get_button_index() == MouseButton::WHEEL_DOWN) - (mb->get_button_index() == MouseButton::WHEEL_UP));
if (scroll_vec != Vector2()) {
if (control_scheme == SCROLL_PANS) {
if (mb->is_ctrl_pressed()) {
callback_helper(zoom_callback, scroll_vec, mb->get_position());
} else {
Vector2 panning;
if (mb->is_shift_pressed()) {
panning.x += mb->get_factor() * scroll_vec.y;
panning.y += mb->get_factor() * scroll_vec.x;
} else {
panning.y += mb->get_factor() * scroll_vec.y;
panning.x += mb->get_factor() * scroll_vec.x;
}
callback_helper(scroll_callback, panning);
return true;
}
} else {
if (mb->is_ctrl_pressed()) {
Vector2 panning;
if (mb->is_shift_pressed()) {
panning.x += mb->get_factor() * scroll_vec.y;
panning.y += mb->get_factor() * scroll_vec.x;
} else {
panning.y += mb->get_factor() * scroll_vec.y;
panning.x += mb->get_factor() * scroll_vec.x;
}
callback_helper(scroll_callback, panning);
return true;
} else if (!mb->is_shift_pressed()) {
callback_helper(zoom_callback, scroll_vec, mb->get_position());
return true;
}
}
}
if (mb->get_button_index() == MouseButton::MIDDLE || (mb->get_button_index() == MouseButton::RIGHT && !disable_rmb) || (mb->get_button_index() == MouseButton::LEFT && (Input::get_singleton()->is_key_pressed(Key::SPACE) || !mb->is_pressed()))) {
if (mb->is_pressed()) {
is_dragging = true;
} else {
is_dragging = false;
}
return true;
}
}
Ref<InputEventMouseMotion> mm = p_event;
if (mm.is_valid()) {
if (is_dragging) {
if (p_canvas_rect != Rect2()) {
callback_helper(pan_callback, Input::get_singleton()->warp_mouse_motion(mm, p_canvas_rect));
} else {
callback_helper(pan_callback, mm->get_relative());
}
return true;
}
}
return false;
}
void ViewPanner::callback_helper(Callable p_callback, Vector2 p_arg1, Vector2 p_arg2) {
if (p_callback == zoom_callback) {
const Variant **argptr = (const Variant **)alloca(sizeof(Variant *) * 2);
Variant var1 = p_arg1;
argptr[0] = &var1;
Variant var2 = p_arg2;
argptr[1] = &var2;
Variant result;
Callable::CallError ce;
p_callback.call(argptr, 2, result, ce);
} else {
const Variant **argptr = (const Variant **)alloca(sizeof(Variant *));
Variant var = p_arg1;
argptr[0] = &var;
Variant result;
Callable::CallError ce;
p_callback.call(argptr, 1, result, ce);
}
}
void ViewPanner::set_callbacks(Callable p_scroll_callback, Callable p_pan_callback, Callable p_zoom_callback) {
scroll_callback = p_scroll_callback;
pan_callback = p_pan_callback;
zoom_callback = p_zoom_callback;
}
void ViewPanner::set_control_scheme(ControlScheme p_scheme) {
control_scheme = p_scheme;
}
void ViewPanner::set_disable_rmb(bool p_disable) {
disable_rmb = p_disable;
}