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VncWidget.cpp
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VncWidget.cpp
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/***********************************************************************
VncWidget - Vrui Widget which connects to and displays a VNC server.
Copyright (c) 2007,2008 Voltaic
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
***********************************************************************/
#include <GLMotif/Container.h>
#include "VncWidget.h"
namespace Voltaic {
//----------------------------------------------------------------------
// VncWidget methods
VncWidget::VncWidget( VncManager::MessageManager& messageManager,
VncManager::PasswordRetrievalThunk& passwordRetrievalThunk,
bool isSlave,
Comm::MulticastPipe* clusterMulticastPipe,
bool trackDisplaySize,
const char* sName,
GLMotif::Container* sParent,
bool sManageChild ) :
GLMotif::Widget(sName, sParent, false),
GLObject(),
vncManager(new VncManager(messageManager, passwordRetrievalThunk, isSlave, clusterMulticastPipe)),
enableClickThrough(true),
trackDisplaySize(trackDisplaySize),
displayWidthMultiplier(DefaultDisplayWidthMultiplier),
displayHeightMultiplier(DefaultDisplayHeightMultiplier),
configuredInteriorSize(DefaultConfiguredInteriorSizeX, DefaultConfiguredInteriorSizeY, DefaultConfiguredInteriorSizeZ),
lastClickPoint()
{
if (sManageChild)
manageChild(); // this has not been safe to do during construction...
}
VncWidget::~VncWidget()
{
if (vncManager)
{
vncManager->shutdown();
delete vncManager;
}
}
void VncWidget::initContext(GLContextData& contextData) const
{
// nothing...
}
void VncWidget::draw(GLContextData& contextData) const
{
Widget::draw(contextData);
if (vncManager)
{
const GLMotif::Box bounds = getInterior();
const GLMotif::Vector c0 = bounds.getCorner(0); // (z, y, x) = (0, 0, 0)
const GLMotif::Vector c1 = bounds.getCorner(1); // (z, y, x) = (0, 0, 1)
const GLMotif::Vector c3 = bounds.getCorner(3); // (z, y, x) = (0, 1, 1)
vncManager->drawRemoteDisplaySurface( c0[0], c0[1], c0[2],
c1[0], c1[1], c1[2],
c3[0], c3[1], c3[2] );
}
}
GLMotif::Vector VncWidget::calcNaturalSize() const
{
GLMotif::Vector interior;
if (trackDisplaySize)
{
interior = GLMotif::Vector( getRemoteDisplayWidth() * displayWidthMultiplier,
getRemoteDisplayHeight() * displayHeightMultiplier,
0.0 );
}
else
{
interior = configuredInteriorSize;
}
return calcExteriorSize(interior);
}
void VncWidget::pointerButtonDown(GLMotif::Event& event)
{
handlePointerEvent(event, 1);//!!! left mouse button always reported...
}
void VncWidget::pointerButtonUp(GLMotif::Event& event)
{
handlePointerEvent(event, 0);//!!! should remember any other (chorded) buttons...
}
void VncWidget::pointerMotion(GLMotif::Event& event)
{
handlePointerEvent(event, 1);//!!! left mouse button always reported...
}
void VncWidget::handlePointerEvent(GLMotif::Event& event, int buttonMask)
{
if (enableClickThrough && vncManager && !vncManager->getRfbIsSameMachine())
{
const GLMotif::Box interior = getInterior();
const GLfloat interiorW = interior.size[0];
const GLfloat interiorH = interior.size[1];
if ((interiorW > 0) && (interiorH > 0))
{
const GLfloat interiorMinX = interior.origin[0];
const GLfloat interiorMaxX = interiorMinX + interiorW;
const GLfloat interiorMinY = interior.origin[1];
const GLfloat interiorMaxY = interiorMinY + interiorH;
const GLMotif::Point point = event.getWidgetPoint().getPoint();
if ((interiorMinX <= point[0]) && (point[0] <= interiorMaxX) && (interiorMinY <= point[1]) && (point[1] <= interiorMaxY))
{
const GLfloat px = point[0] - interiorMinX;
const GLfloat py = interiorH - (point[1] - interiorMinY); // Note: sendPointerEvent() wants y to increase downward...
const GLfloat x = vncManager->getRemoteDisplayWidth() * (px / interiorW);
const GLfloat y = vncManager->getRemoteDisplayHeight() * (py / interiorH);
lastClickPoint = point;
(void)sendPointerEvent((int)(x+0.5), (int)(y+0.5), buttonMask);
}
}
}
}
void VncWidget::setEnableClickThrough(bool value)
{
enableClickThrough = value;
}
void VncWidget::setTrackDisplaySize(bool value)
{
trackDisplaySize = value;
attemptSizeUpdate();
}
void VncWidget::setDisplaySizeMultipliers(GLfloat widthValue, GLfloat heightValue)
{
displayWidthMultiplier = widthValue;
displayHeightMultiplier = heightValue;
attemptSizeUpdate();
}
void VncWidget::setConfiguredInteriorSize( const GLMotif::Vector& sizeValue,
bool trackDisplaySizeValue )
{
configuredInteriorSize = sizeValue;
configuredInteriorSize[2] = 0.0; // z size value is always 0
trackDisplaySize = trackDisplaySizeValue;
attemptSizeUpdate();
}
void VncWidget::attemptSizeUpdate()
{
const GLMotif::Vector newExteriorSize = calcNaturalSize();
if (parent && isManaged)
parent->requestResize(this, newExteriorSize);
else
{
// resize directly, preserving upper-left corner of widget
resize(GLMotif::Box(getExterior().origin, newExteriorSize));
}
}
bool VncWidget::checkForUpdates()
{
bool updated = false;
if (vncManager)
{
const GLsizei oldWidth = getRemoteDisplayWidth();
const GLsizei oldHeight = getRemoteDisplayHeight();
if (vncManager->performQueuedActions())
updated = true;
if ( (getRemoteDisplayWidth() != oldWidth) ||
(getRemoteDisplayHeight() != oldHeight) )
{
updated = true;
if (trackDisplaySize)
attemptSizeUpdate();
}
}
return updated;
}
bool VncWidget::sendKeyEvent(rfbCARD32 key, bool down)
{
return (vncManager != 0) && vncManager->sendKeyEvent(key, down);
}
bool VncWidget::sendPointerEvent(int x, int y, int buttonMask)
{
return (vncManager != 0) && vncManager->sendPointerEvent(x, y, buttonMask);
}
bool VncWidget::sendClientCutText(const char* str, size_t len)
{
return (vncManager != 0) && vncManager->sendClientCutText(str, len);
}
void VncWidget::startup(const VncManager::RFBProtocolStartupData& rfbProtocolStartupData)
{
if (vncManager)
vncManager->startup(rfbProtocolStartupData);
}
void VncWidget::shutdown()
{
if (vncManager)
vncManager->shutdown();
}
const GLfloat VncWidget::DefaultDisplayWidthMultiplier = 1.0; // static member
const GLfloat VncWidget::DefaultDisplayHeightMultiplier = 1.0; // static member
const GLfloat VncWidget::DefaultConfiguredInteriorSizeX = 640.0; // static member
const GLfloat VncWidget::DefaultConfiguredInteriorSizeY = 480.0; // static member
const GLfloat VncWidget::DefaultConfiguredInteriorSizeZ = 0.0; // static member; z size value is always 0
} // end of namespace Voltaic