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//=========================================================
// MusE
// Linux Music Editor
// vst_native_editor.cpp
// (C) Copyright 2012 Tim E. Real (terminator356 on users dot sourceforge dot net)
// Some of the editor window coding was adapted from QTractor (by rncbc aka Rui Nuno Capela)
//
// 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; 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
//=========================================================
#include "config.h"
#ifdef VST_NATIVE_SUPPORT
#include "vst_native_editor.h"
#include "vst_native.h"
#include <QtGlobal>
#if defined(Q_WS_X11)
#include <QX11Info>
#endif
namespace MusEGui {
//---------------------------------------------------------------------
// Helpers for editor widget.
//---------------------------------------------------------------------
#if defined(Q_WS_X11)
static bool g_bXError = false;
static int tempXErrorHandler ( Display *, XErrorEvent * )
{
g_bXError = true;
return 0;
}
static XEventProc getXEventProc ( Display *pDisplay, Window w )
{
int iSize;
unsigned long iBytes, iCount;
unsigned char *pData;
XEventProc eventProc = NULL;
Atom aType, aName = XInternAtom(pDisplay, "_XEventProc", false);
g_bXError = false;
XErrorHandler oldErrorHandler = XSetErrorHandler(tempXErrorHandler);
XGetWindowProperty(pDisplay, w, aName, 0, 1, false,
AnyPropertyType, &aType, &iSize, &iCount, &iBytes, &pData);
if (g_bXError == false && iCount == 1)
eventProc = (XEventProc) (pData);
XSetErrorHandler(oldErrorHandler);
return eventProc;
}
static Window getXChildWindow ( Display *pDisplay, Window w )
{
Window wRoot, wParent, *pwChildren;
unsigned int iChildren = 0;
XQueryTree(pDisplay, w, &wRoot, &wParent, &pwChildren, &iChildren);
return (iChildren > 0 ? pwChildren[0] : 0);
}
#endif // Q_WS_X11
VstNativeEditor::VstNativeEditor(QWidget *parent, Qt::WindowFlags wflags)
: QWidget(parent, wflags),
#if defined(Q_WS_X11)
_display(QX11Info::display()),
_vstEditor(0),
_vstEventProc(0),
_buttonPress(false),
#endif
_sif(0)
{
setAttribute(Qt::WA_DeleteOnClose);
// TODO TEST Test if these might be helpful, especially opaque event.
//setBackgroundRole(QPalette::NoRole);
//setAttribute(Qt::WA_NoSystemBackground);
// setAttribute(Qt::WA_StaticContents);
// // This is absolutely required for speed! Otherwise painfully slow because of full background
// // filling, even when requesting small udpdates! Background is drawn by us.
//setAttribute(Qt::WA_OpaquePaintEvent);
// //setFrameStyle(QFrame::Raised | QFrame::StyledPanel);
}
VstNativeEditor::~VstNativeEditor()
{
if(_sif)
{
_sif->dispatch(effEditClose, 0, 0, NULL, 0.0f);
_sif->editorDeleted();
_sif = NULL;
}
}
//---------------------------------------------------------------------
// open
//---------------------------------------------------------------------
void VstNativeEditor::open(MusECore::VstNativeSynthIF* sif)
{
_sif = sif;
// Start the proper (child) editor...
long value = 0;
void *ptr = (void *) winId();
#if defined(Q_WS_X11)
value = (long) _display;
#endif
MusECore::VstRect* pRect;
if(_sif->dispatch(effEditGetRect, 0, 0, &pRect, 0.0f))
{
int w = pRect->right - pRect->left;
int h = pRect->bottom - pRect->top;
if (w > 0 && h > 0)
QWidget::setFixedSize(w, h);
}
_sif->dispatch(effEditOpen, 0, value, ptr, 0.0f);
//int rv = _sif->dispatch(effEditOpen, 0, value, ptr, 0.0f);
//fprintf(stderr, "VstNativeEditor::open effEditOpen returned:%d effEditGetRect rect l:%d r:%d t:%d b:%d\n", rv, pRect->left, pRect->right, pRect->top, pRect->bottom); // REMOVE Tim.
#if defined(Q_WS_X11)
_vstEditor = getXChildWindow(_display, (Window) winId());
if(_vstEditor)
_vstEventProc = getXEventProc(_display, _vstEditor);
#endif
if(_sif->track())
{
QString title = _sif->track()->name() + ":" + _sif->pluginLabel();
setWindowTitle(title);
}
//_sif->editorOpened();
if(!isVisible())
show();
raise();
activateWindow();
///_sif->idleEditor(); // REMOVE Tim. Or keep.
}
#if defined(Q_WS_X11)
//---------------------------------------------------------------------
// x11EventFilter
//---------------------------------------------------------------------
bool VstNativeEditor::x11EventFilter(XEvent *pEvent)
{
if(_vstEventProc && pEvent->xany.window == _vstEditor)
{
// Avoid mouse tracking events...
switch (pEvent->xany.type) {
case ButtonPress:
_buttonPress = true;
break;
case ButtonRelease:
_buttonPress = false;
break;
case MotionNotify:
if(!_buttonPress)
return false;
// Fall thru...
default:
break;
}
// Process as intended...
(*_vstEventProc)(pEvent);
return true;
}
else
return false;
}
#endif
//---------------------------------------------------------------------
// showEvent
//---------------------------------------------------------------------
void VstNativeEditor::showEvent(QShowEvent *pShowEvent)
{
QWidget::showEvent(pShowEvent);
if(_sif)
_sif->editorOpened();
}
//---------------------------------------------------------------------
// closeEvent
//---------------------------------------------------------------------
void VstNativeEditor::closeEvent(QCloseEvent *pCloseEvent)
{
if(_sif)
_sif->editorClosed();
QWidget::closeEvent(pCloseEvent);
}
//---------------------------------------------------------------------
// moveEvent
//---------------------------------------------------------------------
void VstNativeEditor::moveEvent(QMoveEvent *pMoveEvent)
{
QWidget::moveEvent(pMoveEvent);
#if defined(Q_WS_X11)
if(_vstEditor)
{
XMoveWindow(_display, _vstEditor, 0, 0);
//QWidget::update(); // REMOVE Tim. Or keep? Commented in Qtractor.
}
#endif
}
} // namespace MusEGui
#endif // VST_NATIVE_SUPPORT
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