Borderless Grayscale Images

[Duncan Perrett elekta com]

Hello,

I have succeeded in writing a gtkmm application which displays a grayscale
window using Gdk::Drawable::draw_gray_image( );

I create a class inheriting from Gtk::DrawingArea.

Here is my code ...

***********************************************************************************************

main.cc

#include "myImageDisplay.h"
#include <gtkmm/main.h>
#include <gtkmm/window.h>

int main (int argc, char *argv[])
{
    Gtk::Main kit(argc, argv);

    Gtk::Window win;

    MyImageDisplay myImage;
    win.add(myImage);
    myImage.show();

    Gtk::Main::run(win);

    return 0;
}

myImageDisplay.h

#ifndef GTKMM_MYIMAGEDISPLAY_H
#define GTKMM_MYIMAGEDISPLAY_H

#include <gtkmm/drawingarea.h>
#include <gdkmm/window.h>

class MyImageDisplay : public Gtk::DrawingArea
{
public:
    MyImageDisplay();
    virtual ~MyImageDisplay();

protected:
    //Overridden default signal handlers:
    virtual void on_realize();
    // The redraw event
    virtual bool on_expose_event(GdkEventExpose* event);

    // Area to store image data
    char m_Image[500000];

    // Graphic context
    Glib::RefPtr<Gdk::GC> m_refGC;
};

#endif // GTKMM_MYIMAGEDISPLAY_H


myImageDisplay.cc

#include "myImageDisplay.h"

MyImageDisplay::MyImageDisplay()
{
    int n;

    // Create an image (temporary code)
    for (n=0; n < 320 * 240; n++)
    {
        m_Image[n] = n % 320;
    }
}

MyImageDisplay::~MyImageDisplay()
{

}

// Called when the window is created.  Only now can you get a valid GC for
the window
// This is called only once on startup
void MyImageDisplay::on_realize()
{
    // Must call base version
    Gtk::DrawingArea::on_realize();

    // Get a GC (Graphics Context)
    Glib::RefPtr<Gdk::Window> window = get_window();
    m_refGC = Gdk::GC::create(window);
}

// Expose or paint event - called if part or all of the window needs
updating
bool MyImageDisplay::on_expose_event(GdkEventExpose *event)
{
    Glib::RefPtr<Gdk::Window> window = get_window();
    window->clear();
    window->draw_gray_image(m_refGC, 0, 0, 320, 240,
                            Gdk::RGB_DITHER_NORMAL, (guchar*)m_Image, 320);
    return true;
}

**************************************************************************************


This seems to work nicely.  However, I really want the displayed
window/widget to be borderless (and fullscreen).
I don't want the title, minimize, maximise icons etc.



(Embedded image moved to file: pic22386.jpg)


Is this possible?

Thanks.






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