/**************************************************************************/ /* view_panner.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 "view_panner.h" #include "core/input/input.h" #include "core/input/shortcut.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()) { 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)); // Moving the scroll wheel sends two events: one with pressed as true, // and one with pressed as false. Make sure we only process one of them. if (scroll_vec != Vector2() && mb->is_pressed()) { if (control_scheme == SCROLL_PANS) { if (mb->is_ctrl_pressed()) { // Compute the zoom factor. float zoom_factor = mb->get_factor() <= 0 ? 1.0 : mb->get_factor(); zoom_factor = ((scroll_zoom_factor - 1.0) * zoom_factor) + 1.0; float zoom = (scroll_vec.x + scroll_vec.y) > 0 ? 1.0 / scroll_zoom_factor : scroll_zoom_factor; callback_helper(zoom_callback, varray(zoom, mb->get_position(), p_event)); return true; } else { Vector2 panning = scroll_vec * mb->get_factor(); if (pan_axis == PAN_AXIS_HORIZONTAL) { panning = Vector2(panning.x + panning.y, 0); } else if (pan_axis == PAN_AXIS_VERTICAL) { panning = Vector2(0, panning.x + panning.y); } else if (mb->is_shift_pressed()) { panning = Vector2(panning.y, panning.x); } callback_helper(pan_callback, varray(-panning * scroll_speed, p_event)); return true; } } else { if (mb->is_ctrl_pressed()) { Vector2 panning = scroll_vec * mb->get_factor(); if (pan_axis == PAN_AXIS_HORIZONTAL) { panning = Vector2(panning.x + panning.y, 0); } else if (pan_axis == PAN_AXIS_VERTICAL) { panning = Vector2(0, panning.x + panning.y); } else if (mb->is_shift_pressed()) { panning = Vector2(panning.y, panning.x); } callback_helper(pan_callback, varray(-panning * scroll_speed, p_event)); return true; } else if (!mb->is_shift_pressed()) { // Compute the zoom factor. float zoom_factor = mb->get_factor() <= 0 ? 1.0 : mb->get_factor(); zoom_factor = ((scroll_zoom_factor - 1.0) * zoom_factor) + 1.0; float zoom = (scroll_vec.x + scroll_vec.y) > 0 ? 1.0 / scroll_zoom_factor : scroll_zoom_factor; callback_helper(zoom_callback, varray(zoom, mb->get_position(), p_event)); return true; } } } // Alt is not used for button presses, so ignore it. if (mb->is_alt_pressed()) { return false; } bool is_drag_event = mb->get_button_index() == MouseButton::MIDDLE || (enable_rmb && mb->get_button_index() == MouseButton::RIGHT) || (!simple_panning_enabled && mb->get_button_index() == MouseButton::LEFT && is_panning()) || (force_drag && mb->get_button_index() == MouseButton::LEFT); if (is_drag_event) { if (mb->is_pressed()) { is_dragging = true; } else { is_dragging = false; } return mb->get_button_index() != MouseButton::LEFT || mb->is_pressed(); // Don't consume LMB release events (it fixes some selection problems). } } Ref<InputEventMouseMotion> mm = p_event; if (mm.is_valid()) { if (is_dragging) { if (p_canvas_rect != Rect2()) { callback_helper(pan_callback, varray(Input::get_singleton()->warp_mouse_motion(mm, p_canvas_rect), p_event)); } else { callback_helper(pan_callback, varray(mm->get_relative(), p_event)); } return true; } } Ref<InputEventMagnifyGesture> magnify_gesture = p_event; if (magnify_gesture.is_valid()) { // Zoom gesture callback_helper(zoom_callback, varray(magnify_gesture->get_factor(), magnify_gesture->get_position(), p_event)); return true; } Ref<InputEventPanGesture> pan_gesture = p_event; if (pan_gesture.is_valid()) { callback_helper(pan_callback, varray(-pan_gesture->get_delta() * scroll_speed, p_event)); } Ref<InputEventScreenDrag> screen_drag = p_event; if (screen_drag.is_valid()) { if (Input::get_singleton()->is_emulating_mouse_from_touch() || Input::get_singleton()->is_emulating_touch_from_mouse()) { // This set of events also generates/is generated by // InputEventMouseButton/InputEventMouseMotion events which will be processed instead. } else { callback_helper(pan_callback, varray(screen_drag->get_relative(), p_event)); } } Ref<InputEventKey> k = p_event; if (k.is_valid()) { if (pan_view_shortcut.is_valid() && pan_view_shortcut->matches_event(k)) { pan_key_pressed = k->is_pressed(); if (simple_panning_enabled || Input::get_singleton()->get_mouse_button_mask().has_flag(MouseButtonMask::LEFT)) { is_dragging = pan_key_pressed; } return true; } } return false; } void ViewPanner::release_pan_key() { pan_key_pressed = false; is_dragging = false; } void ViewPanner::callback_helper(Callable p_callback, Vector<Variant> p_args) { const Variant **argptr = (const Variant **)alloca(sizeof(Variant *) * p_args.size()); for (int i = 0; i < p_args.size(); i++) { argptr[i] = &p_args[i]; } Variant result; Callable::CallError ce; p_callback.callp(argptr, p_args.size(), result, ce); } void ViewPanner::set_callbacks(Callable p_pan_callback, Callable p_zoom_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_enable_rmb(bool p_enable) { enable_rmb = p_enable; } void ViewPanner::set_pan_shortcut(Ref<Shortcut> p_shortcut) { pan_view_shortcut = p_shortcut; pan_key_pressed = false; } void ViewPanner::set_simple_panning_enabled(bool p_enabled) { simple_panning_enabled = p_enabled; } void ViewPanner::set_scroll_speed(int p_scroll_speed) { ERR_FAIL_COND(p_scroll_speed <= 0); scroll_speed = p_scroll_speed; } void ViewPanner::set_scroll_zoom_factor(float p_scroll_zoom_factor) { ERR_FAIL_COND(p_scroll_zoom_factor <= 1.0); scroll_zoom_factor = p_scroll_zoom_factor; } void ViewPanner::set_pan_axis(PanAxis p_pan_axis) { pan_axis = p_pan_axis; } void ViewPanner::setup(ControlScheme p_scheme, Ref<Shortcut> p_shortcut, bool p_simple_panning) { set_control_scheme(p_scheme); set_pan_shortcut(p_shortcut); set_simple_panning_enabled(p_simple_panning); } bool ViewPanner::is_panning() const { return is_dragging || pan_key_pressed; } void ViewPanner::set_force_drag(bool p_force) { force_drag = p_force; } ViewPanner::ViewPanner() { Array inputs; inputs.append(InputEventKey::create_reference(Key::SPACE)); pan_view_shortcut.instantiate(); pan_view_shortcut->set_events(inputs); }