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flightgear/src/Main/FGEventHandler.cxx
timoore 1955e5bd28 Don't call idle and draw functions from FGEventHandler::handle. 
These functions are now called in fgOSMainLoop. The fgMainLoop
function was being called twice, which resulted in a slow-down, but
also caused the displayed frame rate to double!
2008-11-20 11:01:05 +00:00

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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <osg/Camera>
#include <osg/GraphicsContext>
#include <osg/Math>
#include <osg/Viewport>
#include <osgViewer/Viewer>
#include <plib/pu.h>
#include <Main/fg_props.hxx>
#include "CameraGroup.hxx"
#include "FGEventHandler.hxx"
#include "WindowSystemAdapter.hxx"
#if !defined(X_DISPLAY_MISSING)
#define X_DOUBLE_SCROLL_BUG 1
#endif
namespace flightgear
{
const int displayStatsKey = 1;
const int printStatsKey = 2;
// The manipulator is responsible for updating a Viewer's camera. Its
// event handling method is also a convenient place to run the FG idle
// and draw handlers.
FGEventHandler::FGEventHandler() :
idleHandler(0),
drawHandler(0),
windowResizeHandler(0),
keyHandler(0),
mouseClickHandler(0),
mouseMotionHandler(0),
statsHandler(new osgViewer::StatsHandler),
statsEvent(new osgGA::GUIEventAdapter),
statsType(osgViewer::StatsHandler::NO_STATS),
currentModifiers(0),
resizable(true),
mouseWarped(false),
scrollButtonPressed(false)
{
using namespace osgGA;
statsHandler->setKeyEventTogglesOnScreenStats(displayStatsKey);
statsHandler->setKeyEventPrintsOutStats(printStatsKey);
statsEvent->setEventType(GUIEventAdapter::KEYDOWN);
// OSG reports NumPad keycodes independent of the NumLock modifier.
// Both KP-4 and KP-Left are reported as KEY_KP_Left (0xff96), so we
// have to generate the locked keys ourselves.
numlockKeyMap[GUIEventAdapter::KEY_KP_Insert] = '0';
numlockKeyMap[GUIEventAdapter::KEY_KP_End] = '1';
numlockKeyMap[GUIEventAdapter::KEY_KP_Down] = '2';
numlockKeyMap[GUIEventAdapter::KEY_KP_Page_Down] = '3';
numlockKeyMap[GUIEventAdapter::KEY_KP_Left] = '4';
numlockKeyMap[GUIEventAdapter::KEY_KP_Begin] = '5';
numlockKeyMap[GUIEventAdapter::KEY_KP_Right] = '6';
numlockKeyMap[GUIEventAdapter::KEY_KP_Home] = '7';
numlockKeyMap[GUIEventAdapter::KEY_KP_Up] = '8';
numlockKeyMap[GUIEventAdapter::KEY_KP_Page_Up] = '9';
for (int i = 0; i < 128; i++)
release_keys[i] = i;
}
namespace
{
// Translate OSG modifier mask to FG modifier mask.
int osgToFGModifiers(int modifiers)
{
int result = 0;
if (modifiers & osgGA::GUIEventAdapter::MODKEY_SHIFT)
result |= KEYMOD_SHIFT;
if (modifiers & osgGA::GUIEventAdapter::MODKEY_CTRL)
result |= KEYMOD_CTRL;
if (modifiers & osgGA::GUIEventAdapter::MODKEY_ALT)
result |= KEYMOD_ALT;
if (modifiers & osgGA::GUIEventAdapter::MODKEY_META)
result |= KEYMOD_META;
if (modifiers & osgGA::GUIEventAdapter::MODKEY_SUPER)
result |= KEYMOD_SUPER;
if (modifiers & osgGA::GUIEventAdapter::MODKEY_HYPER)
result |= KEYMOD_HYPER;
return result;
}
}
#if 0
void FGEventHandler::init(const osgGA::GUIEventAdapter& ea,
osgGA::GUIActionAdapter& us)
{
currentModifiers = osgToFGModifiers(ea.getModKeyMask());
(void)handle(ea, us);
}
#endif
// Calculate event coordinates in the viewport of the GUI camera, if
// possible. Otherwise return false and (-1, -1).
namespace
{
bool
eventToViewport(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& us,
int& x, int& y)
{
x = -1;
y = -1;
const osg::GraphicsContext* eventGC = ea.getGraphicsContext();
const osg::GraphicsContext::Traits* traits = eventGC->getTraits();
osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
if (!guiCamera)
return false;
osg::Viewport* vport = guiCamera->getViewport();
if (!vport)
return false;
// Scale x, y to the dimensions of the window
double wx = (((ea.getX() - ea.getXmin()) / (ea.getXmax() - ea.getXmin()))
* (float)traits->width);
double wy = (((ea.getY() - ea.getYmin()) / (ea.getYmax() - ea.getYmin()))
* (float)traits->height);
if (vport->x() <= wx && wx <= vport->x() + vport->width()
&& vport->y() <= wy && wy <= vport->y() + vport->height()) {
// Finally, into viewport coordinates. Change y to "increasing
// downwards".
x = wx - vport->x();
y = vport->height() - (wy - vport->y());
return true;
} else {
return false;
}
}
}
bool FGEventHandler::handle(const osgGA::GUIEventAdapter& ea,
osgGA::GUIActionAdapter& us)
{
int x = 0;
int y = 0;
switch (ea.getEventType()) {
case osgGA::GUIEventAdapter::FRAME:
mouseWarped = false;
handleStats(us);
return true;
case osgGA::GUIEventAdapter::KEYDOWN:
case osgGA::GUIEventAdapter::KEYUP:
{
int key, modmask;
handleKey(ea, key, modmask);
eventToViewport(ea, us, x, y);
if (keyHandler)
(*keyHandler)(key, modmask, x, y);
return true;
}
case osgGA::GUIEventAdapter::PUSH:
case osgGA::GUIEventAdapter::RELEASE:
{
bool mainWindow = eventToViewport(ea, us, x, y);
int button = 0;
switch (ea.getButton()) {
case osgGA::GUIEventAdapter::LEFT_MOUSE_BUTTON:
button = 0;
break;
case osgGA::GUIEventAdapter::MIDDLE_MOUSE_BUTTON:
button = 1;
break;
case osgGA::GUIEventAdapter::RIGHT_MOUSE_BUTTON:
button = 2;
break;
}
if (mouseClickHandler)
(*mouseClickHandler)(button,
(ea.getEventType()
== osgGA::GUIEventAdapter::RELEASE), x, y, mainWindow, &ea);
return true;
}
case osgGA::GUIEventAdapter::SCROLL:
{
bool mainWindow = eventToViewport(ea, us, x, y);
#ifdef X_DOUBLE_SCROLL_BUG
scrollButtonPressed = !scrollButtonPressed;
if (!scrollButtonPressed) // Drop the button release event
return true;
#endif
int button;
if (ea.getScrollingMotion() == osgGA::GUIEventAdapter::SCROLL_UP)
button = 3;
else
button = 4;
if (mouseClickHandler) {
(*mouseClickHandler)(button, 0, x, y, mainWindow, &ea);
(*mouseClickHandler)(button, 1, x, y, mainWindow, &ea);
}
return true;
}
case osgGA::GUIEventAdapter::MOVE:
case osgGA::GUIEventAdapter::DRAG:
// If we warped the mouse, then disregard all pointer motion
// events for this frame. We really want to flush the event
// queue of mouse events, but don't have the ability to do
// that with osgViewer.
if (mouseWarped)
return true;
if (eventToViewport(ea, us, x, y) && mouseMotionHandler)
(*mouseMotionHandler)(x, y);
return true;
case osgGA::GUIEventAdapter::RESIZE:
CameraGroup::getDefault()->resized();
if (resizable && windowResizeHandler)
(*windowResizeHandler)(ea.getWindowWidth(), ea.getWindowHeight());
return true;
case osgGA::GUIEventAdapter::CLOSE_WINDOW:
case osgGA::GUIEventAdapter::QUIT_APPLICATION:
fgOSExit(0);
return true;
default:
return false;
}
}
void FGEventHandler::handleKey(const osgGA::GUIEventAdapter& ea, int& key,
int& modifiers)
{
using namespace osgGA;
key = ea.getKey();
// XXX Probably other translations are needed too.
switch (key) {
case GUIEventAdapter::KEY_Escape: key = 0x1b; break;
case GUIEventAdapter::KEY_Return: key = '\n'; break;
case GUIEventAdapter::KEY_BackSpace: key = '\b'; break;
case GUIEventAdapter::KEY_Delete: key = 0x7f; break;
case GUIEventAdapter::KEY_Tab: key = '\t'; break;
case GUIEventAdapter::KEY_Left: key = PU_KEY_LEFT; break;
case GUIEventAdapter::KEY_Up: key = PU_KEY_UP; break;
case GUIEventAdapter::KEY_Right: key = PU_KEY_RIGHT; break;
case GUIEventAdapter::KEY_Down: key = PU_KEY_DOWN; break;
case GUIEventAdapter::KEY_Page_Up: key = PU_KEY_PAGE_UP; break;
case GUIEventAdapter::KEY_Page_Down: key = PU_KEY_PAGE_DOWN; break;
case GUIEventAdapter::KEY_Home: key = PU_KEY_HOME; break;
case GUIEventAdapter::KEY_End: key = PU_KEY_END; break;
case GUIEventAdapter::KEY_Insert: key = PU_KEY_INSERT; break;
case GUIEventAdapter::KEY_F1: key = PU_KEY_F1; break;
case GUIEventAdapter::KEY_F2: key = PU_KEY_F2; break;
case GUIEventAdapter::KEY_F3: key = PU_KEY_F3; break;
case GUIEventAdapter::KEY_F4: key = PU_KEY_F4; break;
case GUIEventAdapter::KEY_F5: key = PU_KEY_F5; break;
case GUIEventAdapter::KEY_F6: key = PU_KEY_F6; break;
case GUIEventAdapter::KEY_F7: key = PU_KEY_F7; break;
case GUIEventAdapter::KEY_F8: key = PU_KEY_F8; break;
case GUIEventAdapter::KEY_F9: key = PU_KEY_F9; break;
case GUIEventAdapter::KEY_F10: key = PU_KEY_F10; break;
case GUIEventAdapter::KEY_F11: key = PU_KEY_F11; break;
case GUIEventAdapter::KEY_F12: key = PU_KEY_F12; break;
case GUIEventAdapter::KEY_KP_Delete: key = '.'; break;
case GUIEventAdapter::KEY_KP_Enter: key = '\r'; break;
case GUIEventAdapter::KEY_KP_Add: key = '+'; break;
case GUIEventAdapter::KEY_KP_Divide: key = '/'; break;
case GUIEventAdapter::KEY_KP_Multiply: key = '*'; break;
case GUIEventAdapter::KEY_KP_Subtract: key = '-'; break;
}
osgGA::GUIEventAdapter::EventType eventType = ea.getEventType();
std::map<int, int>::iterator numPadIter = numlockKeyMap.find(key);
if (numPadIter != numlockKeyMap.end()) {
if (ea.getModKeyMask() & osgGA::GUIEventAdapter::MODKEY_NUM_LOCK) {
key = numPadIter->second;
}
}
modifiers = osgToFGModifiers(ea.getModKeyMask());
currentModifiers = modifiers;
if (eventType == osgGA::GUIEventAdapter::KEYUP)
modifiers |= KEYMOD_RELEASED;
// Release the letter key, for which the key press was reported. This
// is to deal with Ctrl-press -> a-press -> Ctrl-release -> a-release
// correctly.
if (key >= 0 && key < 128) {
if (modifiers & KEYMOD_RELEASED) {
key = release_keys[key];
} else {
release_keys[key] = key;
if (key >= 1 && key <= 26) {
release_keys[key + '@'] = key;
release_keys[key + '`'] = key;
} else if (key >= 'A' && key <= 'Z') {
release_keys[key - '@'] = key;
release_keys[tolower(key)] = key;
} else if (key >= 'a' && key <= 'z') {
release_keys[key - '`'] = key;
release_keys[toupper(key)] = key;
}
}
}
}
void FGEventHandler::handleStats(osgGA::GUIActionAdapter& us)
{
static SGPropertyNode_ptr display = fgGetNode("/sim/rendering/on-screen-statistics", true);
static SGPropertyNode_ptr print = fgGetNode("/sim/rendering/print-statistics", true);
int type = display->getIntValue() % osgViewer::StatsHandler::LAST;
if (type != statsType) {
statsEvent->setKey(displayStatsKey);
do {
statsType = (statsType + 1) % osgViewer::StatsHandler::LAST;
statsHandler->handle(*statsEvent, us);
} while (statsType != type);
display->setIntValue(statsType);
}
if (print->getBoolValue()) {
statsEvent->setKey(printStatsKey);
statsHandler->handle(*statsEvent, us);
print->setBoolValue(false);
}
}
void eventToWindowCoords(const osgGA::GUIEventAdapter* ea,
double& x, double& y)
{
using namespace osg;
const GraphicsContext* gc = ea->getGraphicsContext();
const GraphicsContext::Traits* traits = gc->getTraits() ;
// Scale x, y to the dimensions of the window
x = (((ea->getX() - ea->getXmin()) / (ea->getXmax() - ea->getXmin()))
* (double)traits->width);
y = (((ea->getY() - ea->getYmin()) / (ea->getYmax() - ea->getYmin()))
* (double)traits->height);
if (ea->getMouseYOrientation() == osgGA::GUIEventAdapter::Y_INCREASING_DOWNWARDS)
y = (double)traits->height - y;
}
void eventToWindowCoordsYDown(const osgGA::GUIEventAdapter* ea,
double& x, double& y)
{
using namespace osg;
const GraphicsContext* gc = ea->getGraphicsContext();
const GraphicsContext::Traits* traits = gc->getTraits() ;
// Scale x, y to the dimensions of the window
x = (((ea->getX() - ea->getXmin()) / (ea->getXmax() - ea->getXmin()))
* (double)traits->width);
y = (((ea->getY() - ea->getYmin()) / (ea->getYmax() - ea->getYmin()))
* (double)traits->height);
if (ea->getMouseYOrientation() == osgGA::GUIEventAdapter::Y_INCREASING_UPWARDS)
y = (double)traits->height - y;
}
}
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