I have no problems with moving my window, I want to
have an opportunity to resize it!
Here is my code:
myprog.h
Qt Code: 
  1. #include <QtGui>
  2. #include <QtDeclarative>
  3.  
  4.  
  5. class MyProg : public QDeclarativeView
  6. {
  7.     Q_OBJECT
  8.  
  9. public:
  10.     MyProg(QWidget *parent = 0);
  11.     ~MyProg();
  12.  
  13.     Q_INVOKABLE void moveWindow(int x,int y, int, int);
  14.  
  15.  
  16. };
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myprog.cpp

Qt Code: 
  1. #include "myprog.h"
  2.  
  3. MyProg::MyProg(QWidget *parent)
  4. //    : QWidget(parent,0)
  5.     :  QDeclarativeView(parent)
  6. {
  7.  
  8.  
  9.    rootContext()->setContextProperty("mainwnd",this);
  10.    setResizeMode(QDeclarativeView::SizeRootObjectToView);
  11.    setSource(QUrl("qml/main.qml"));
  12.  
  13.  
  14.  
  15. }
  16.  
  17. MyProg::~MyProg()
  18. {
  19.  
  20. }
  21.  
  22. void MyProg::moveWindow(int x,int y, int lx, int ly)
  23. {
  24.     QPoint p = mapToGlobal(QPoint(x,y));
  25.     p.setX(p.x() - lx);
  26.     p.setY(p.y() - ly);
  27.     this->move(p);
  28. }
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main.cpp

Qt Code: 
  1. #include <QtGui/QApplication>
  2. #include "myprog.h"
  3.  
  4. int main(int argc, char *argv[])
  5. {
  6.  
  7.     QApplication a(argc, argv);
  8.  
  9.  
  10.     MyProg w;
  11.  
  12.  
  13.     w.setWindowFlags(Qt::FramelessWindowHint) ;
  14.         w.setAttribute(Qt::WA_TranslucentBackground);
  15.        w.setStyleSheet("background:transparent");
  16.  
  17.  
  18.  
  19.  
  20.  
  21.     w.show();
  22.  
  23.     return a.exec();
  24. }
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It seems to me, that I must catch the press button event in qml code first, and then calculate QDeclarativeView window geometry in my cpp code...
something like that,I think.