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/****************************************************************************
**
** Copyright (C) 2002 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//==============================================================================
// Prefix
//==============================================================================
#include "stdafx.h"
//==============================================================================
// Includes
//==============================================================================
#include "ScrollerThumb.h"
#include "ScrollerBar.h"
#include "Renderer.h"
#include "StudioPreferences.h"
//==============================================================================
// Static variables
//==============================================================================
const long CScrollerThumb::MIN_LENGTH = 32;
//=============================================================================
/**
* Constructor
* @param inScrollerBar the scroller bar this is operating on.
*/
CScrollerThumb::CScrollerThumb(IScrollerBar *inScrollerBar)
: m_MouseDown(false)
{
m_ScrollerBar = inScrollerBar;
}
//=============================================================================
/**
* Destructor
*/
CScrollerThumb::~CScrollerThumb()
{
}
//=============================================================================
/**
* Draw this scroller bar.
* @param inRenderer the renderer this is to draw to.
*/
void CScrollerThumb::Draw(CRenderer *inRenderer)
{
if (IsEnabled()) {
CPt theSize = GetSize();
CRct theRect(theSize);
// Draw the thumb
inRenderer->FillRoundedRect(theRect, CStudioPreferences::GetScrollThumbBGColor(),
m_ScrollerBar->GetOrientation() == CScrollerBar::VERTICAL);
}
}
//=============================================================================
/**
* Listener for the OnMouseDown to allow dragging.
* Begins dragging of the control.
*/
bool CScrollerThumb::OnMouseDown(CPt inPoint, Qt::KeyboardModifiers inFlags)
{
if (!CControl::OnMouseDown(inPoint, inFlags)) {
m_MouseDown = true;
m_MouseDownPoint = inPoint;
Invalidate();
}
return true;
}
//=============================================================================
/**
* Ends dragging of the control.
*/
void CScrollerThumb::OnMouseUp(CPt inPoint, Qt::KeyboardModifiers inFlags)
{
CControl::OnMouseUp(inPoint, inFlags);
m_MouseDown = false;
Invalidate();
}
//=============================================================================
/**
* Used for dragging the control.
*/
void CScrollerThumb::OnMouseMove(CPt inPoint, Qt::KeyboardModifiers inFlags)
{
CControl::OnMouseMove(inPoint, inFlags);
// Only care if the mouse is down.
if (m_MouseDown) {
long theBarPos = m_ScrollerBar->GetBarPosition();
// Adjust the position based on which way we are being dragged.
if (m_ScrollerBar->GetOrientation() == CScrollerBar::VERTICAL) {
theBarPos += inPoint.y - m_MouseDownPoint.y;
} else {
theBarPos += inPoint.x - m_MouseDownPoint.x;
}
// Update the position.
m_ScrollerBar->SetBarPosition(theBarPos);
}
}
//=============================================================================
/**
* Get the minimum size that this scroller thumb is allowed to be.
* @return the minimum size that this scroller thumb is allowed to be.
*/
CPt CScrollerThumb::GetMinimumSize()
{
if (m_ScrollerBar->GetOrientation() == CScrollerBar::HORIZONTAL)
return CPt(MIN_LENGTH, 0);
else
return CPt(0, MIN_LENGTH);
}
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