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Take a look at the class hierarchy diagram for vtkInteractorStyle at <a
href="http://www.vtk.org/doc/nightly/html/classvtkInteractorStyle.html">http://www.vtk.org/doc/nightly/html/classvtkInteractorStyle.html</a><br>
<br>
Looks from the code snippet you gave...<br>
<pre wrap="">code from the main:
......
#include "vtkMyInteractorStyle.h"
<font color="#cc0000">#include "vtkInteractorStyleSwitch.h"
</font></pre>
...that before your change, a vtkInteractorStyleSwitch was
instantiated. You can derive your class from vtkInteractorStyleSwitch
rather than vtkInteractorStyle and inherit all of its behavior. Be sure
to call the parent class for keys you don't handle yourself in OnChar.
That way, you'll get all the behavior you had before you wrote your own.<br>
<br>
<br>
HTH,<br>
David<br>
<br>
<br>
verena kinder wrote:
<blockquote cite="mid456626787@web.de" type="cite">
<pre wrap="">Hello!
In order to interact to my render Window by keypress I derive a class vtkMyInteractorStyle from vtkInteractorStyle.
Code vtkMyInteractorStyle.h:
#ifndef __vtkMyInteractorStyle_h
#define __vtkMyInteractorStyle_h
#include "vtkInteractorStyle.h"
class vtkMyInteractorStyle : public vtkInteractorStyle
{
public:
virtual void OnChar();
};
#endif
Code vtkMyInteractorStyle.cxx:
#include "vtkMyInteractorStyle.h"
#include "vtkCallbackCommand.h"
#include "vtkCommand.h"
#include "vtkObjectFactory.h"
#include "vtkRenderWindowInteractor.h"
#include <iostream>
using namespace std;
//----------------------------------------------------------------------------
void vtkMyInteractorStyle::OnChar()
{
switch (this->Interactor->GetKeyCode())
{
case 'w':
case 'W':
cout<<"You press the W key "<<endl;
break;
}
}
code from the main:
......
#include "vtkMyInteractorStyle.h"
#include "vtkInteractorStyleSwitch.h"
#include <iostream>
using namespace std;
int main (int argc, char **argv)
{
/**********************************************************
SET RENDER WINDOW and INTERCTION VALUES
************************************************************/
vtkRenderer *aRenderer = vtkRenderer::New();
aRenderer->SetBackground(1.0,0.0,0.0);
vtkRenderWindow *renWin = vtkRenderWindow::New();
renWin->AddRenderer(aRenderer);
vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
iren->SetRenderWindow(renWin);
vtkMyInteractorStyle *style=vtkMyInteractorStyle::New();
iren->SetInteractorStyle(style);
/***************************************************************/
.......
/**************************************START RENDERING*******************************/
aRenderer->AddProp(vol);
aRenderer->AddActor(axesActor);
renWin->Render();
// Initialize the event loop and then start it.
iren->Initialize();
iren->Start();
/*************************************DELETE******************************************/
return 0;
}
But if I set :
iren->SetInteractorStyle(style);
I overwrite the exsisting interactions like zooming with the mouse and so on.
But that I dont't want because I need them.
How can I handle this problem?
What function shall I add to my class?
Thanks !
Verena
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</pre>
</blockquote>
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