186 lines
7 KiB
C++
186 lines
7 KiB
C++
/*************************************************************************/
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/* view_panner.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 "view_panner.h"
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#include "core/input/input.h"
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#include "core/input/shortcut.h"
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#include "core/os/keyboard.h"
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bool ViewPanner::gui_input(const Ref<InputEvent> &p_event, Rect2 p_canvas_rect) {
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Ref<InputEventMouseButton> mb = p_event;
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if (mb.is_valid()) {
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Vector2 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));
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// Moving the scroll wheel sends two events: one with pressed as true,
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// and one with pressed as false. Make sure we only process one of them.
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if (scroll_vec != Vector2() && mb->is_pressed()) {
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if (control_scheme == SCROLL_PANS) {
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if (mb->is_ctrl_pressed()) {
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scroll_vec.y *= mb->get_factor();
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callback_helper(zoom_callback, varray(scroll_vec, mb->get_position(), mb->is_alt_pressed()));
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return true;
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} else {
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Vector2 panning;
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if (mb->is_shift_pressed()) {
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panning.x += mb->get_factor() * scroll_vec.y;
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panning.y += mb->get_factor() * scroll_vec.x;
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} else {
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panning.y += mb->get_factor() * scroll_vec.y;
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panning.x += mb->get_factor() * scroll_vec.x;
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}
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callback_helper(scroll_callback, varray(panning, mb->is_alt_pressed()));
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return true;
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}
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} else {
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if (mb->is_ctrl_pressed()) {
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Vector2 panning;
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if (mb->is_shift_pressed()) {
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panning.x += mb->get_factor() * scroll_vec.y;
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panning.y += mb->get_factor() * scroll_vec.x;
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} else {
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panning.y += mb->get_factor() * scroll_vec.y;
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panning.x += mb->get_factor() * scroll_vec.x;
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}
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callback_helper(scroll_callback, varray(panning, mb->is_alt_pressed()));
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return true;
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} else if (!mb->is_shift_pressed()) {
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scroll_vec.y *= mb->get_factor();
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callback_helper(zoom_callback, varray(scroll_vec, mb->get_position(), mb->is_alt_pressed()));
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return true;
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}
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}
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}
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// Alt is not used for button presses, so ignore it.
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if (mb->is_alt_pressed()) {
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return false;
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}
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bool is_drag_event = mb->get_button_index() == MouseButton::MIDDLE ||
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(enable_rmb && mb->get_button_index() == MouseButton::RIGHT) ||
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(!simple_panning_enabled && mb->get_button_index() == MouseButton::LEFT && is_panning()) ||
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(force_drag && mb->get_button_index() == MouseButton::LEFT);
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if (is_drag_event) {
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if (mb->is_pressed()) {
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is_dragging = true;
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} else {
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is_dragging = false;
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}
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return mb->get_button_index() != MouseButton::LEFT || mb->is_pressed(); // Don't consume LMB release events (it fixes some selection problems).
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}
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}
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Ref<InputEventMouseMotion> mm = p_event;
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if (mm.is_valid()) {
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if (is_dragging) {
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if (p_canvas_rect != Rect2()) {
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callback_helper(pan_callback, varray(Input::get_singleton()->warp_mouse_motion(mm, p_canvas_rect)));
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} else {
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callback_helper(pan_callback, varray(mm->get_relative()));
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}
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return true;
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}
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}
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Ref<InputEventKey> k = p_event;
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if (k.is_valid()) {
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if (pan_view_shortcut.is_valid() && pan_view_shortcut->matches_event(k)) {
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pan_key_pressed = k->is_pressed();
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if (simple_panning_enabled || (Input::get_singleton()->get_mouse_button_mask() & MouseButton::LEFT) != MouseButton::NONE) {
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is_dragging = pan_key_pressed;
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}
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return true;
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}
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}
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return false;
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}
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void ViewPanner::release_pan_key() {
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pan_key_pressed = false;
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is_dragging = false;
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}
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void ViewPanner::callback_helper(Callable p_callback, Vector<Variant> p_args) {
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const Variant **argptr = (const Variant **)alloca(sizeof(Variant *) * p_args.size());
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for (int i = 0; i < p_args.size(); i++) {
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argptr[i] = &p_args[i];
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}
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Variant result;
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Callable::CallError ce;
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p_callback.callp(argptr, p_args.size(), result, ce);
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}
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void ViewPanner::set_callbacks(Callable p_scroll_callback, Callable p_pan_callback, Callable p_zoom_callback) {
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scroll_callback = p_scroll_callback;
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pan_callback = p_pan_callback;
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zoom_callback = p_zoom_callback;
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}
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void ViewPanner::set_control_scheme(ControlScheme p_scheme) {
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control_scheme = p_scheme;
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}
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void ViewPanner::set_enable_rmb(bool p_enable) {
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enable_rmb = p_enable;
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}
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void ViewPanner::set_pan_shortcut(Ref<Shortcut> p_shortcut) {
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pan_view_shortcut = p_shortcut;
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pan_key_pressed = false;
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}
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void ViewPanner::set_simple_panning_enabled(bool p_enabled) {
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simple_panning_enabled = p_enabled;
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}
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void ViewPanner::setup(ControlScheme p_scheme, Ref<Shortcut> p_shortcut, bool p_simple_panning) {
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set_control_scheme(p_scheme);
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set_pan_shortcut(p_shortcut);
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set_simple_panning_enabled(p_simple_panning);
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}
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bool ViewPanner::is_panning() const {
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return is_dragging || pan_key_pressed;
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}
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void ViewPanner::set_force_drag(bool p_force) {
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force_drag = p_force;
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}
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ViewPanner::ViewPanner() {
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Array inputs;
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inputs.append(InputEventKey::create_reference(Key::SPACE));
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pan_view_shortcut.instantiate();
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pan_view_shortcut->set_events(inputs);
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}
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