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230 lines
8.6 KiB
C++
230 lines
8.6 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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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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if (scroll_vec.y != 0) {
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// Compute the zoom factor.
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float zoom_factor = mb->get_factor() <= 0 ? 1.0 : mb->get_factor();
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zoom_factor = ((scroll_zoom_factor - 1.0) * zoom_factor) + 1.0;
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float zoom = scroll_vec.y > 0 ? 1.0 / scroll_zoom_factor : scroll_zoom_factor;
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zoom_callback.call(zoom, mb->get_position(), p_event);
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return true;
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}
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} else {
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Vector2 panning = scroll_vec * mb->get_factor();
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if (pan_axis == PAN_AXIS_HORIZONTAL) {
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panning = Vector2(panning.x + panning.y, 0);
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} else if (pan_axis == PAN_AXIS_VERTICAL) {
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panning = Vector2(0, panning.x + panning.y);
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} else if (mb->is_shift_pressed()) {
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panning = Vector2(panning.y, panning.x);
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}
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pan_callback.call(-panning * scroll_speed, p_event);
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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 = scroll_vec * mb->get_factor();
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if (pan_axis == PAN_AXIS_HORIZONTAL) {
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panning = Vector2(panning.x + panning.y, 0);
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} else if (pan_axis == PAN_AXIS_VERTICAL) {
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panning = Vector2(0, panning.x + panning.y);
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} else if (mb->is_shift_pressed()) {
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panning = Vector2(panning.y, panning.x);
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}
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pan_callback.call(-panning * scroll_speed, p_event);
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return true;
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} else if (!mb->is_shift_pressed() && scroll_vec.y != 0) {
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// Compute the zoom factor.
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float zoom_factor = mb->get_factor() <= 0 ? 1.0 : mb->get_factor();
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zoom_factor = ((scroll_zoom_factor - 1.0) * zoom_factor) + 1.0;
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float zoom = scroll_vec.y > 0 ? 1.0 / scroll_zoom_factor : scroll_zoom_factor;
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zoom_callback.call(zoom, mb->get_position(), p_event);
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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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pan_callback.call(Input::get_singleton()->warp_mouse_motion(mm, p_canvas_rect), p_event);
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} else {
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pan_callback.call(mm->get_relative(), p_event);
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}
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return true;
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}
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}
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Ref<InputEventMagnifyGesture> magnify_gesture = p_event;
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if (magnify_gesture.is_valid()) {
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// Zoom gesture
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zoom_callback.call(magnify_gesture->get_factor(), magnify_gesture->get_position(), p_event);
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return true;
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}
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Ref<InputEventPanGesture> pan_gesture = p_event;
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if (pan_gesture.is_valid()) {
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if (pan_gesture->is_ctrl_pressed()) {
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// Zoom gesture.
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float pan_zoom_factor = 1.02f;
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float zoom_direction = pan_gesture->get_delta().x - pan_gesture->get_delta().y;
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if (zoom_direction == 0.f) {
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return true;
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}
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float zoom = zoom_direction < 0 ? 1.0 / pan_zoom_factor : pan_zoom_factor;
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zoom_callback.call(zoom, pan_gesture->get_position(), p_event);
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return true;
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}
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pan_callback.call(-pan_gesture->get_delta() * scroll_speed, p_event);
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}
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Ref<InputEventScreenDrag> screen_drag = p_event;
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if (screen_drag.is_valid()) {
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if (Input::get_singleton()->is_emulating_mouse_from_touch() || Input::get_singleton()->is_emulating_touch_from_mouse()) {
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// This set of events also generates/is generated by
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// InputEventMouseButton/InputEventMouseMotion events which will be processed instead.
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} else {
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pan_callback.call(screen_drag->get_relative(), p_event);
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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().has_flag(MouseButtonMask::LEFT)) {
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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::set_callbacks(Callable p_pan_callback, Callable p_zoom_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::set_scroll_speed(int p_scroll_speed) {
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ERR_FAIL_COND(p_scroll_speed <= 0);
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scroll_speed = p_scroll_speed;
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}
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void ViewPanner::set_scroll_zoom_factor(float p_scroll_zoom_factor) {
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ERR_FAIL_COND(p_scroll_zoom_factor <= 1.0);
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scroll_zoom_factor = p_scroll_zoom_factor;
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}
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void ViewPanner::set_pan_axis(PanAxis p_pan_axis) {
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pan_axis = p_pan_axis;
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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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