gtkImageGetIconSet(object)
gtkImageGetImage(object)
gtkImageGetPixbuf(object)
gtkImageGetPixmap(object)
gtkImageGetStock(object)
gtkImageGetAnimation(object)
gtkImageGetIconName(object)
gtkImageGetGicon(object)
gtkImageGetStorageType(object)
gtkImageNewFromFile(filename, show = TRUE)
gtkImageNewFromIconSet(icon.set, size, show = TRUE)
gtkImageNewFromImage(image = NULL, mask = NULL, show = TRUE)
gtkImageNewFromPixbuf(pixbuf = NULL, show = TRUE)
gtkImageNewFromPixmap(pixmap = NULL, mask = NULL, show = TRUE)
gtkImageNewFromStock(stock.id, size, show = TRUE)
gtkImageNewFromAnimation(animation, show = TRUE)
gtkImageNewFromIconName(icon.name, size)
gtkImageNewFromGicon(icon, size, show = TRUE)
gtkImageSetFromFile(object, filename = NULL)
gtkImageSetFromIconSet(object, icon.set, size)
gtkImageSetFromImage(object, gdk.image = NULL, mask = NULL)
gtkImageSetFromPixbuf(object, pixbuf = NULL)
gtkImageSetFromPixmap(object, pixmap, mask = NULL)
gtkImageSetFromStock(object, stock.id, size)
gtkImageSetFromAnimation(object, animation)
gtkImageSetFromIconName(object, icon.name, size)
gtkImageSetFromGicon(object, icon, size)
gtkImageClear(object)
gtkImageNew(show = TRUE)
gtkImageSet(object, val, mask)
gtkImageGet(object)
gtkImageSetPixelSize(object, pixel.size)
gtkImageGetPixelSize(object)
gtkImage(size, mask = NULL, pixmap = NULL, image = NULL, filename, pixbuf = NULL, stock.id, icon.set, animation, icon, show = TRUE)GtkBuildable.GtkImage widget displays an image. Various kinds of object
can be displayed as an image; most typically, you would load a
GdkPixbuf ("pixel buffer") from a file, and then display that.
There's a convenience function to do this, gtkImageNewFromFile,
used as follows:
image <- gtkImageNewFromFile("myfile.png")
# or, perhaps more conveniently
image <- gtkImage(file="myfile.png")
If the file isn't loaded successfully, the image will contain a
"broken image" icon similar to that used in many web browsers.
If you want to handle errors in loading the file yourself,
for example by displaying an error message, then load the image with
gdkPixbufNewFromFile, then create the GtkImage with
gtkImageNewFromPixbuf.
The image file may contain an animation, if so the GtkImage will
display an animation (GdkPixbufAnimation) instead of a static image.
GtkImage is a subclass of GtkMisc, which implies that you can
align it (center, left, right) and add padding to it, using
GtkMisc methods.
GtkImage is a "no window" widget (has no GdkWindow of its own),
so by default does not receive events. If you want to receive events
on the image, such as button clicks, place the image inside a
GtkEventBox, then connect to the event signals on the event box. Handling button press events on a
GtkImage .
# Handling button-press events on a GtkImage
button_press_callback <- function(event_box, event, data) {
print(paste("Event box clicked at coordinates ", event[["x"]], ",",
event[["y"]], sep=""))
## Returning TRUE means we handled the event, so the signal ## emission should be stopped (don't call any further ## callbacks that may be connected). Return FALSE ## to continue invoking callbacks. return(TRUE) }
create_image <- function() {
image <- gtkImage(file="myfile.png")
event_box <- gtkEventBox()
event_box$add(image)
gSignalConnect(event_box, "button_press_event", button_press_callback, image)
return(image)
}
When handling events on the event box, keep in mind that coordinates
in the image may be different from event box coordinates due to
the alignment and padding settings on the image (see GtkMisc).
The simplest way to solve this is to set the alignment to 0.0
(left/top), and set the padding to zero. Then the origin of
the image will be the same as the origin of the event box.
Sometimes an application will want to avoid depending on external data
files, such as image files. GTK+ comes with a program to avoid this,
called GdkPixbuf using
gdkPixbufNewFromInline().
gtkImage is the result of collapsing the constructors of GtkImage (gtkImageNew, gtkImageNewFromPixmap, gtkImageNewFromImage, gtkImageNewFromFile, gtkImageNewFromPixbuf, gtkImageNewFromStock, gtkImageNewFromIconSet, gtkImageNewFromAnimation, gtkImageNewFromGicon) and accepts a subset of its arguments matching the required arguments of one of its delegate constructors.