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Moved CAF to Fwk/AppFwk and moved/renamed VisualizationModules to Fwk/VizFwk
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sigurdp
256
Fwk/AppFwk/CommonCode/cafMouseState.cpp
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256
Fwk/AppFwk/CommonCode/cafMouseState.cpp
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//##################################################################################################
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//
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// Custom Visualization Core library
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// Copyright (C) 2011-2013 Ceetron AS
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//
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// This library may be used under the terms of either the GNU General Public License or
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// the GNU Lesser General Public License as follows:
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//
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// GNU General Public License Usage
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// This library 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 3 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE.
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//
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// See the GNU General Public License at <<http://www.gnu.org/licenses/gpl.html>>
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// for more details.
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//
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// GNU Lesser General Public License Usage
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// This library is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE.
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//
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// See the GNU Lesser General Public License at <<http://www.gnu.org/licenses/lgpl-2.1.html>>
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// for more details.
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//
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//##################################################################################################
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#include "cvfBase.h"
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#include "cvfMath.h"
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#include "cafMouseState.h"
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#include <QMouseEvent>
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#include <QGraphicsSceneMouseEvent>
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#include <math.h>
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namespace caf {
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//==================================================================================================
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///
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/// \class cvfqt::QtMouseState
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/// \ingroup GuiQt
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///
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/// Helper class for storing mouse positions and button states.
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/// Should be reset whenever widget looses focus.
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///
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//==================================================================================================
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//--------------------------------------------------------------------------------------------------
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///
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//--------------------------------------------------------------------------------------------------
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QtMouseState::QtMouseState()
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{
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m_cleanButtonClickTolerance = 3;
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reset();
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}
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//--------------------------------------------------------------------------------------------------
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///
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//--------------------------------------------------------------------------------------------------
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void QtMouseState::updateFromMouseEvent(QMouseEvent* event)
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{
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// Always update with current state
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m_mouseButtonState = event->buttons();
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m_keyboardModifierFlags = event->modifiers();
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// Now do the events themselves
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// Mouse press events
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if (event->type() == QEvent::MouseButtonPress)
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{
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// Start by clearing them
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m_cleanButtonPressButton = Qt::NoButton;
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m_cleanButtonClickButton = Qt::NoButton;;
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m_cleanButtonPressPosX = cvf::UNDEFINED_INT;
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m_cleanButtonPressPosY = cvf::UNDEFINED_INT;
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Qt::MouseButton buttonPressed = event->button();
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if (numMouseButtonsInState(m_mouseButtonState) == 1)
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{
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m_cleanButtonPressButton = buttonPressed;
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m_cleanButtonPressPosX = event->x();
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m_cleanButtonPressPosY = event->y();
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}
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}
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// Mouse button release events
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else if (event->type() == QEvent::MouseButtonRelease)
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{
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// Clear it now, might set it later
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m_cleanButtonClickButton = Qt::NoButton;
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Qt::MouseButton buttonReleased = event->button();
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// Check if we have a clean press/release sequence
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if (m_cleanButtonPressButton == buttonReleased &&
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m_cleanButtonPressPosX != cvf::UNDEFINED_INT &&
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m_cleanButtonPressPosY != cvf::UNDEFINED_INT)
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{
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// We have a candidate, check if movement is within tolerance
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if (cvf::Math::abs(double((m_cleanButtonPressPosX - event->x()))) <= m_cleanButtonClickTolerance &&
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cvf::Math::abs(double((m_cleanButtonPressPosY - event->y()))) <= m_cleanButtonClickTolerance)
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{
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m_cleanButtonClickButton = buttonReleased;
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}
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m_cleanButtonPressButton = Qt::NoButton;;
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m_cleanButtonPressPosX = cvf::UNDEFINED_INT;
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m_cleanButtonPressPosY = cvf::UNDEFINED_INT;
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}
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}
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else if (event->type() == QEvent::MouseMove)
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{
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// For now nothing to do
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}
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}
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//--------------------------------------------------------------------------------------------------
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///
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//--------------------------------------------------------------------------------------------------
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void QtMouseState::updateFromMouseEvent(QGraphicsSceneMouseEvent* event)
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{
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// Always update with current state
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m_mouseButtonState = event->buttons();
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m_keyboardModifierFlags = event->modifiers();
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// Now do the events themselves
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if (event->type() == QEvent::GraphicsSceneMousePress)
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{
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// Start by clearing them
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m_cleanButtonPressButton = Qt::NoButton;
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m_cleanButtonClickButton = Qt::NoButton;;
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m_cleanButtonPressPosX = cvf::UNDEFINED_INT;
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m_cleanButtonPressPosY = cvf::UNDEFINED_INT;
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Qt::MouseButton buttonPressed = event->button();
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if (numMouseButtonsInState(m_mouseButtonState) == 1)
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{
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m_cleanButtonPressButton = buttonPressed;
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m_cleanButtonPressPosX = (int)event->scenePos().x();
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m_cleanButtonPressPosY = (int)event->scenePos().y();
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}
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}
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// Mouse button release events
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else if (event->type() == QEvent::GraphicsSceneMouseRelease)
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{
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// Clear it now, might set it later
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m_cleanButtonClickButton = Qt::NoButton;
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Qt::MouseButton buttonReleased = event->button();
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// Check if we have a clean press/release sequence
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if (m_cleanButtonPressButton == buttonReleased &&
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m_cleanButtonPressPosX != cvf::UNDEFINED_INT &&
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m_cleanButtonPressPosY != cvf::UNDEFINED_INT)
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{
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// We have a candidate, check if movement is within tolerance
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if (cvf::Math::abs(double((m_cleanButtonPressPosX - event->scenePos().x()))) <= m_cleanButtonClickTolerance &&
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cvf::Math::abs(double((m_cleanButtonPressPosY - event->scenePos().y()))) <= m_cleanButtonClickTolerance)
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{
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m_cleanButtonClickButton = buttonReleased;
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}
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m_cleanButtonPressButton = Qt::NoButton;;
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m_cleanButtonPressPosX = cvf::UNDEFINED_INT;
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m_cleanButtonPressPosY = cvf::UNDEFINED_INT;
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}
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}
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else if (event->type() == QEvent::GraphicsSceneMouseMove)
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{
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// For now nothing to do
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}
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}
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//--------------------------------------------------------------------------------------------------
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///
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//--------------------------------------------------------------------------------------------------
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void QtMouseState::reset()
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{
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m_mouseButtonState = Qt::NoButton;
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m_cleanButtonPressButton = Qt::NoButton;
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m_cleanButtonPressPosX = cvf::UNDEFINED_INT;
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m_cleanButtonPressPosY = cvf::UNDEFINED_INT;
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m_cleanButtonClickButton = Qt::NoButton;
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}
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//--------------------------------------------------------------------------------------------------
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///
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//--------------------------------------------------------------------------------------------------
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Qt::MouseButtons QtMouseState::mouseButtonState() const
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{
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return m_mouseButtonState;
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}
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//--------------------------------------------------------------------------------------------------
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///
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//--------------------------------------------------------------------------------------------------
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Qt::KeyboardModifiers QtMouseState::keyboardModifierFlags() const
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{
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return m_keyboardModifierFlags;
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}
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//--------------------------------------------------------------------------------------------------
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/// Get button that was cleanly clicked if any
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//--------------------------------------------------------------------------------------------------
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Qt::MouseButton QtMouseState::cleanButtonClickButton() const
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{
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return m_cleanButtonClickButton;
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}
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//--------------------------------------------------------------------------------------------------
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/// Static helper function to determine the number of mouse buttons pressed
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//--------------------------------------------------------------------------------------------------
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int QtMouseState::numMouseButtonsInState(Qt::MouseButtons buttonState)
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{
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int iNum = 0;
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if (buttonState & Qt::LeftButton) iNum++;
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if (buttonState & Qt::RightButton) iNum++;
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if (buttonState & Qt::MidButton) iNum++;
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return iNum;
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}
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} // namespace caf
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