Hi, 2 attached c++ files show implementation of vtk binding to gtk (based on gtkglext) - I was told that there vtk simply draws into a gtk widget. On windows (linux works fine) I get problems with resizing app's window containing this vtkGtk widget (see attached image - red arrow) - vtk stuff gets out of its borders. The question is: how does vtk determines the dimensions of the widget it has to draw to? what can be done about it? thank you in advance Zeev Pekar
/*========================================================================= Program: Visualization Toolkit Module: $RCSfile: vtkGtkRenderWindowInteractor.cxx,v $ Language: C++ Date: $Date: 2002/11/22 16:25:58 $ Version: $Revision: 0.1 $ Based on wvXRenderWindowInteractor and wxVTKRenderWindowInteractor. Copyright (c) 2004 Dov Grobgeld <dov grobgeld weizmann ac il> Based on code copyright by: Ken Martin, Will Schroeder, Bill Lorensen All rights reserved. See Copyright.txt or http://www.kitware.com/Copyright.htm for details. This software is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the above copyright notice for more information. =========================================================================*/ #ifndef __vtkGtkRenderWindowInteractor_h #define __vtkGtkRenderWindowInteractor_h //=========================================================== // now we define the C++ class #include "vtkRenderWindowInteractor.h" #include "vtkRenderWindow.h" #include "gtk/gtk.h" class VTK_RENDERING_EXPORT vtkGtkRenderWindowInteractor : public vtkRenderWindowInteractor { public: // Constructor vtkGtkRenderWindowInteractor(); // Destructor ~vtkGtkRenderWindowInteractor(); // Object factory. TBD. static vtkGtkRenderWindowInteractor *New(); // vtkRenderWindowInteractor overrides void Initialize(); void Enable(); void Disable(); void Start(); void UpdateSize(int x, int y); int CreateTimer(int timertype); int DestroyTimer(); void TerminateApp() {}; void Render(); // accessor function for drawing area used for gl interaction GtkWidget *get_drawing_area() { return drawing_area; } // Make all callback friends friend void cb_realize (GtkWidget*, gpointer user_data); friend gboolean cb_configure (GtkWidget *widget, GdkEventConfigure *event, gpointer user_data); friend gboolean cb_expose (GtkWidget *widget, GdkEventExpose *event, gpointer user_data); friend gboolean cb_key_press_event(GtkWidget *widget, GdkEventKey *event, gpointer user_data); friend gboolean cb_key_release_event(GtkWidget *widget, GdkEventKey *event, gpointer user_data); friend gboolean cb_button_press_event(GtkWidget *widget, GdkEventButton *event, gpointer user_data); friend gboolean cb_button_release_event(GtkWidget *widget, GdkEventButton *event, gpointer user_data); friend gboolean cb_motion_notify_event(GtkWidget *widget, GdkEventMotion *event, gpointer user_data); friend gboolean cb_scroll_event(GtkWidget *widget, GdkEventScroll *event, gpointer user_data); // Dov - timeout callback - will have to cast the user_data... friend gboolean vtkGtkRenderWindowInteractorTimer(gpointer user_data); protected: int ActiveButton; int RenderAllowed; long GetHandle(); int Stereo; private: long Handle; bool Created; int RenderWhenDisabled; int UseCaptureMouse; GtkWidget *drawing_area; gint last_xpos, last_ypos, last_key_state; // Flag used to break timer loop bool do_break_timer; void update_mouse_pos(); }; #endif
/*========================================================================= Program: Visualization Toolkit Module: $RCSfile: vtkGtkRenderWindowInteractor.cxx,v $ Language: C++ Date: $Date: 2002/11/22 16:25:58 $ Version: $Revision: 0.1 $ Based on wvXRenderWindowInteractor and wxVTKRenderWindowInteractor. Copyright (c) 2007 Dov Grobgeld <dov grobgeld gmail com> Based on code copyright by: Ken Martin, Will Schroeder, Bill Lorensen All rights reserved. See Copyright.txt or http://www.kitware.com/Copyright.htm for details. This software is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the above copyright notice for more information. =========================================================================*/ #include "vtkGtkRenderWindowInteractor.h" #include "vtkRenderer.h" #include "vtkCamera.h" #include "vtkCommand.h" #include <gtk/gtk.h> #include <gtk/gtkgl.h> #ifdef G_OS_WIN32 #include "gdk/gdkwin32.h" #else #include <gdk/gdkx.h> #endif #include <gdk/gdk.h> #include <gdk/gdkprivate.h> void cb_realize (GtkWidget*, gpointer user_data); gboolean cb_expose (GtkWidget *widget, GdkEventExpose *event, gpointer user_data); gboolean cb_key_press_event (GtkWidget *widget, GdkEventKey *event, gpointer user_data); gboolean cb_key_release_event(GtkWidget *widget, GdkEventKey *event, gpointer user_data); gboolean cb_button_press_event(GtkWidget *widget, GdkEventButton *event, gpointer user_data); gboolean cb_button_release_event(GtkWidget *widget, GdkEventButton *event, gpointer user_data); gboolean cb_motion_notify_event(GtkWidget *widget, GdkEventMotion *event, gpointer user_data); gboolean cb_scroll_event (GtkWidget *widget, GdkEventScroll *event, gpointer user_data); gboolean cb_configure(GtkWidget *widget, GdkEventConfigure *event, gpointer user_data); gboolean vtkGtkRenderWindowInteractorTimer(gpointer client_data); // Construct an instance so that the light follows the camera motion. vtkGtkRenderWindowInteractor::vtkGtkRenderWindowInteractor() : vtkRenderWindowInteractor() , RenderAllowed(false) , RenderWhenDisabled(true) , Created(true) , UseCaptureMouse(false) , Handle(0) , Stereo(0) , ActiveButton(0) , last_xpos(0) , last_ypos(0) , last_key_state(0) , do_break_timer(false) { GdkGLConfig *glconfig; drawing_area = gtk_drawing_area_new(); GTK_WIDGET_SET_FLAGS (drawing_area, GTK_CAN_FOCUS); gtk_widget_set_events(GTK_WIDGET(drawing_area), GDK_EXPOSURE_MASK | GDK_STRUCTURE_MASK | GDK_PROPERTY_CHANGE_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK | GDK_LEAVE_NOTIFY_MASK | GDK_ENTER_NOTIFY_MASK ); glconfig = gdk_gl_config_new_by_mode (GdkGLConfigMode(GDK_GL_MODE_RGB | GDK_GL_MODE_DEPTH | GDK_GL_MODE_DOUBLE)); /* Set OpenGL-capability to the widget. */ gtk_widget_set_gl_capability (drawing_area, glconfig, NULL, TRUE, GDK_GL_RGBA_TYPE); gtk_widget_set_double_buffered(drawing_area, FALSE); g_signal_connect(drawing_area, "realize", G_CALLBACK(&cb_realize), (gpointer)this); g_signal_connect(drawing_area, "configure_event", G_CALLBACK(&cb_configure), (gpointer)this); g_signal_connect(drawing_area, "expose_event", G_CALLBACK(&cb_expose), (gpointer)this); g_signal_connect(drawing_area, "key_press_event", G_CALLBACK(&cb_key_press_event), (gpointer)this); g_signal_connect(drawing_area, "key_release_event", G_CALLBACK(&cb_key_release_event), (gpointer)this); g_signal_connect(drawing_area, "button_press_event", G_CALLBACK(&cb_button_press_event), (gpointer)this); g_signal_connect(drawing_area, "button_release_event", G_CALLBACK(&cb_button_release_event), (gpointer)this); g_signal_connect(drawing_area, "scroll_event", G_CALLBACK(&cb_scroll_event), (gpointer)this); g_signal_connect(drawing_area, "motion_notify_event", G_CALLBACK(&cb_motion_notify_event), (gpointer)this); // Copied from wxVTKRenderWindowInteractor... What is it for? vtkRenderWindowInteractor::SetRenderWindow(vtkRenderWindow::New()); RenderWindow->Delete(); } vtkGtkRenderWindowInteractor * vtkGtkRenderWindowInteractor::New() { // we are not registered in the objectfactor return new vtkGtkRenderWindowInteractor; } // Todo constructor with more options... vtkGtkRenderWindowInteractor::~vtkGtkRenderWindowInteractor() { gtk_widget_destroy(drawing_area); } // Initializes the event handlers using a parent widget that you have // provided. This assumes that you want to own the event loop. void vtkGtkRenderWindowInteractor::Initialize() { Enable(); RenderWindow->Start(); Initialized = 1; } void vtkGtkRenderWindowInteractor::Enable() { if (Enabled) return; Enabled = true; Modified(); } void vtkGtkRenderWindowInteractor::Disable() { if (!Enabled) return; Enabled = false; Modified(); } void vtkGtkRenderWindowInteractor::Start() { fprintf(stderr, "Interactor cannot control event loop!\n"); } void vtkGtkRenderWindowInteractor::UpdateSize(int x,int y) { // if the size changed send this on to the RenderWindow if ((x != this->Size[0]) || (y != this->Size[1])) { this->Size[0] = x; this->Size[1] = y; this->RenderWindow->SetSize(x,y); } } int vtkGtkRenderWindowInteractor::CreateTimer(int timertype) { if (timertype == VTKI_TIMER_FIRST) { // We use a repeating timer? Do we need to keep an id for it? g_timeout_add(10, &vtkGtkRenderWindowInteractorTimer, (gpointer)(this)); this->do_break_timer = false; } return 1; } int vtkGtkRenderWindowInteractor::DestroyTimer() { this->do_break_timer = true; return 1; } long vtkGtkRenderWindowInteractor::GetHandle() { #ifdef G_OS_WIN32 return (long)GDK_WINDOW_HWND(drawing_area->window); #else return (long)GDK_WINDOW_XWINDOW(drawing_area->window); #endif } void vtkGtkRenderWindowInteractor::Render() { RenderAllowed = 1; if (!RenderWhenDisabled) { // tbd - check if parent is enabled } if (RenderAllowed) { if (Handle && (Handle == GetHandle()) ) { RenderWindow->Render(); } // TBD for reparenting } } void vtkGtkRenderWindowInteractor::update_mouse_pos() { GdkModifierType mask; gdk_window_get_pointer(drawing_area->window, &last_xpos, &last_ypos, &mask); last_key_state = mask; } gboolean vtkGtkRenderWindowInteractorTimer(gpointer client_data) { vtkGtkRenderWindowInteractor *rwi = (vtkGtkRenderWindowInteractor *)client_data; if (rwi->do_break_timer) { return FALSE; } if (rwi->Enabled) { rwi->InvokeEvent(vtkCommand::TimerEvent,NULL); } return TRUE; } void cb_realize(GtkWidget*, gpointer user_data) { vtkGtkRenderWindowInteractor *rwi = (vtkGtkRenderWindowInteractor *)user_data; if (!rwi->Handle) { rwi->Handle = rwi->GetHandle(); rwi->RenderWindow->SetWindowId((void*)rwi->Handle); } // get vtk to render to the drawing area // rwi->Render(); } gboolean cb_configure(GtkWidget *widget, GdkEventConfigure *event, gpointer user_data) { vtkGtkRenderWindowInteractor *rwi = (vtkGtkRenderWindowInteractor *)user_data; rwi->UpdateSize(event->width, event->height); if (!rwi->Enabled) { return TRUE; } rwi->InvokeEvent(vtkCommand::ConfigureEvent, NULL); // get vtk to render to the drawing area rwi->Render(); return TRUE; } // I'm rendering everytime I'm getting an expose event. Perhaps this // is a waist of time... gboolean cb_expose(GtkWidget *widget, GdkEventExpose *event, gpointer user_data) { vtkGtkRenderWindowInteractor *rwi = (vtkGtkRenderWindowInteractor *)user_data; rwi->Render(); return TRUE; } gboolean cb_key_press_event(GtkWidget *widget, GdkEventKey *event, gpointer user_data) { vtkGtkRenderWindowInteractor *rwi = (vtkGtkRenderWindowInteractor *)user_data; gint keyval = event->keyval; char key = 0; if (keyval < 256) { // Todo: Unicode in non-Unicode mode?? key = (char)keyval; } rwi->update_mouse_pos(); rwi->SetEventInformationFlipY(rwi->last_xpos, rwi->last_ypos, event->state & GDK_CONTROL_MASK, event->state & GDK_SHIFT_MASK, key, 0, NULL); rwi->last_key_state = event->state; rwi->InvokeEvent(vtkCommand::KeyPressEvent, NULL); rwi->InvokeEvent(vtkCommand::CharEvent, NULL); return true; } gboolean cb_key_release_event(GtkWidget *widget, GdkEventKey *event, gpointer user_data) { vtkGtkRenderWindowInteractor *rwi = (vtkGtkRenderWindowInteractor *)user_data; gint keyval = event->keyval; char key = 0; if (keyval < 256) { // Todo: Unicode in non-Unicode mode?? key = (char)keyval; } rwi->update_mouse_pos(); rwi->SetEventInformationFlipY(rwi->last_xpos, rwi->last_ypos, event->state & GDK_CONTROL_MASK, event->state & GDK_SHIFT_MASK, key, 0, NULL); rwi->last_key_state = event->state; rwi->InvokeEvent(vtkCommand::KeyReleaseEvent, NULL); return TRUE; } gboolean cb_button_press_event(GtkWidget *widget, GdkEventButton *event, gpointer user_data) { vtkGtkRenderWindowInteractor *rwi = (vtkGtkRenderWindowInteractor *)user_data; gint button = event->button; if (!rwi->Enabled || rwi->ActiveButton != 0) return true; rwi->update_mouse_pos(); rwi->SetEventInformationFlipY(rwi->last_xpos, rwi->last_ypos, rwi->last_key_state & GDK_CONTROL_MASK, rwi->last_key_state & GDK_SHIFT_MASK, '\0', 0, NULL); rwi->ActiveButton = button; switch (button) { case 1: rwi->InvokeEvent(vtkCommand::LeftButtonPressEvent, NULL); break; case 2: rwi->InvokeEvent(vtkCommand::MiddleButtonPressEvent, NULL); break; case 3: rwi->InvokeEvent(vtkCommand::RightButtonPressEvent, NULL); break; default: // Ignore other buttons at the moment break; } // Do we need to worry about capturing the mouse return TRUE; } gboolean cb_scroll_event(GtkWidget *widget, GdkEventScroll *event, gpointer user_data) { vtkGtkRenderWindowInteractor *rwi = (vtkGtkRenderWindowInteractor *)user_data; gint direction = event->direction; double focalPt[3]; double distance = 0; double zoom = 1.0; if (!rwi->Enabled || rwi->ActiveButton != 0) return true; if (direction) zoom = 0.9; else zoom = 1.1; vtkRenderer *ren = rwi->FindPokedRenderer(rwi->last_xpos, rwi->last_ypos); ren->GetActiveCamera()->Zoom(zoom); rwi->RenderWindow->Render(); return TRUE; } gboolean cb_button_release_event(GtkWidget *widget, GdkEventButton *event, gpointer user_data) { vtkGtkRenderWindowInteractor *rwi = (vtkGtkRenderWindowInteractor *)user_data; gint button = event->button; // is this right? if (!rwi->Enabled || rwi->ActiveButton != button) return true; rwi->update_mouse_pos(); rwi->SetEventInformationFlipY(rwi->last_xpos, rwi->last_ypos, rwi->last_key_state & GDK_CONTROL_MASK, rwi->last_key_state & GDK_SHIFT_MASK, '\0', 0, NULL); switch (button) { case 1: rwi->InvokeEvent(vtkCommand::LeftButtonReleaseEvent, NULL); break; case 2: rwi->InvokeEvent(vtkCommand::MiddleButtonReleaseEvent, NULL); break; case 3: rwi->InvokeEvent(vtkCommand::RightButtonReleaseEvent, NULL); break; default: // Ignore other buttons at the moment break; } rwi->ActiveButton = 0; } gboolean cb_motion_notify_event(GtkWidget *widget, GdkEventMotion *event, gpointer user_data) { vtkGtkRenderWindowInteractor *rwi = (vtkGtkRenderWindowInteractor *)user_data; rwi->update_mouse_pos(); rwi->SetEventInformationFlipY(rwi->last_xpos, rwi->last_ypos, rwi->last_key_state & GDK_CONTROL_MASK, rwi->last_key_state & GDK_SHIFT_MASK, '\0', 0, NULL); rwi->InvokeEvent(vtkCommand::MouseMoveEvent, NULL); return true; }
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