Re: Resize and place a background image (Expose Event)

[Rúben Rodrigues <ruben_gr live com pt>]

Hi,

I have made progress, i use this function to make the resize: pixbuf = 
gdk_pixbuf_scale_simple(pixbuf, widget->allocation.width, 
widget->allocation.height, GDK_INTERP_BILINEAR);

This works, but application blocks after a while..

Here is the Expose event function:

void on_layout_Home_expose_event(GtkWidget *widget, GdkEvent *event, 
gpointer   user_data){
     GtkAllocation allocation;
     GtkWidget    *homeWindow;
     GdkPixmap    *background;
     GtkStyle    *style;

     pixbuf = gdk_pixbuf_scale_simple(pixbuf, widget->allocation.width, 
widget->allocation.height, GDK_INTERP_BILINEAR);
     gdk_pixbuf_render_pixmap_and_mask (pixbuf, &background, NULL, 0);
     style = gtk_style_new ();

     style->bg_pixmap[0] = background;
     gtk_widget_set_style (GTK_WIDGET(widget), GTK_STYLE(style));

     return TRUE;

}

Thanks



Às 17:04 de 01/03/2017, Rúben Rodrigues escreveu:
> Hi,
>
> I'm trying to make something like this 
> http://www.kksou.com/php-gtk2/sample-codes/place-a-background-image-in-GtkWindow-Part-6-align-bottom-right-GdkDrawable-draw_pixbuf.php
>  
> but in C language. For now i just want to fill background image to 
> it's cointainer (GtkLayout), because the container is bigger than 
> image, image is displayed in tiles...
>
> So, i make something like this:
>
> // Load model drawing from file.
>     if((pixbuf = gdk_pixbuf_new_from_file("background.png", &error)) 
> == NULL) {
>                 g_print("Error.\n");
>                 return -1;
>     }
>
>
> void on_layout_Home_expose_event(GtkWidget *widget, GdkEvent *event, 
> gpointer   user_data){
>     GtkAllocation allocation;
>     GtkWidget    *homeWindow;
>     GdkPixmap    *background;
>     GtkStyle    *style;
>
>     int w = gdk_pixbuf_get_width(pixbuf);
>     int h = gdk_pixbuf_get_height(pixbuf);
>
>     gtk_widget_get_allocation(GTK_WIDGET(widget),&allocation);
>
>
>     // Set picture as background.
>     homeWindow = GTK_WIDGET(gtk_builder_get_object(builder, 
> "layout_Home"));
>
>     gdk_pixbuf_render_pixmap_and_mask (pixbuf, &background, NULL, 0);
>     style = gtk_style_new ();
>     //style->bg_pixmap[0] = background;
> gdk_draw_pixbuf(style->bg_pixmap[0],NULL,pixbuf,0,0,allocation.width-w-10,allocation.height-h-10,-1,-1,GDK_RGB_DITHER_NONE,0,0);
>  
>
>    gtk_widget_set_style (GTK_WIDGET(homeWindow), GTK_STYLE(style));
>
> //    if(gtk_container_get_children(widget) != NULL){
> //        gtk_widget_send_expose 
> (gtk_container_get_children(widget),event);
> //    }
>
>     return TRUE;
>
> }
>
> But this doesn't work.. and it's normal that program return everytime 
> to expose_event?
>
> Thanks
>
>
> ---
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---
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