105 lines
3.3 KiB
C++
105 lines
3.3 KiB
C++
/*
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Copyright (C) 2001-2006, William Joseph.
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All Rights Reserved.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GtkRadiant; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#pragma once
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#include "timer.h"
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#include <QMouseEvent>
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/// \brief manages mouse button presses in a way:
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/// 1st pressed button determines the release result
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/// release has result, when last button is released
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/// press has result only for 1st button press
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class MousePresses
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{
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public:
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enum Result
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{
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None = Qt::MouseButton::NoButton,
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Left = Qt::MouseButton::LeftButton,
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Right = Qt::MouseButton::RightButton,
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Middle = Qt::MouseButton::MiddleButton,
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Left2x,
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Right2x,
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Middle2x,
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};
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private:
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Result result_to_2x( Result button ) const {
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switch ( button )
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{
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case Left: return Left2x;
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case Right: return Right2x;
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case Middle: return Middle2x;
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default: return None;
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}
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}
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Result result_for_button( Qt::MouseButton button ) const {
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switch ( button )
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{
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case Qt::MouseButton::LeftButton: return Left;
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case Qt::MouseButton::RightButton: return Right;
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case Qt::MouseButton::MiddleButton: return Middle;
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default: return None;
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}
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}
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DoubleClickTimer m_doubleClick;
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Result m_button{};
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Result m_buttonPrev{};
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public:
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#if 1
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Result press( const QMouseEvent *event ){
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const Result newbutton = result_for_button( event->button() );
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if( newbutton != None && event->button() == event->buttons() ){ // brand new press definitely; process even if release event was lost, for responsiveness
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m_button = newbutton;
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m_doubleClick.click();
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return ( m_doubleClick.fired() && m_button == m_buttonPrev )? result_to_2x( m_button ) : m_button;
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}
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return None;
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}
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Result release( const QMouseEvent *event ){
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if( m_button != None && event->buttons() == 0 ){ // last button is released
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const auto result = ( m_doubleClick.fired() && m_button == m_buttonPrev )? result_to_2x( m_button ) : m_button;
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m_buttonPrev = std::exchange( m_button, None );
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return result;
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}
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return None;
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}
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#else
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Result press( const QMouseEvent *event ){
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const Result newbutton = result_for_button( event->button() );
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if( newbutton != None && m_button == None ){
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m_button = newbutton;
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m_doubleClick.click();
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return ( m_doubleClick.fired() && m_button == m_buttonPrev )? result_to_2x( m_button ) : m_button;
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}
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return None;
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}
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Result release( const QMouseEvent *event ){ // release event may be lost... ignore new press and release saved button for consistency
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if( m_button != None && event->buttons() == 0 ){ // last button is released
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const auto result = ( m_doubleClick.fired() && m_button == m_buttonPrev )? result_to_2x( m_button ) : m_button;
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m_buttonPrev = std::exchange( m_button, None );
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return result;
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}
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return None;
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}
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#endif
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};
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