Image

The #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, gtk_image_new_from_file(), used as follows: |[ GtkWidget *image; image = gtk_image_new_from_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 gdk_pixbuf_new_from_file(), then create the #GtkImage with gtk_image_new_from_pixbuf().

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.

|[ static gboolean button_press_callback (GtkWidget *event_box, GdkEventButton *event, gpointer data) { g_print ("Event box clicked at coordinates %f,%f\n", event->x, event->y);

// 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; }

static GtkWidget* create_image (void) { GtkWidget *image; GtkWidget *event_box;

image = gtk_image_new_from_file ("myfile.png");

event_box = gtk_event_box_new ();

gtk_container_add (GTK_CONTAINER (event_box), image);

g_signal_connect (G_OBJECT (event_box), "button_press_event", G_CALLBACK (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 “gdk-pixbuf-csource”. This library allows you to convert an image into a C variable declaration, which can then be loaded into a #GdkPixbuf using gdk_pixbuf_new_from_inline().

CSS nodes

GtkImage has a single CSS node with the name image.

class Image : Misc {

protected

GtkImage* gtkImage;

GtkImage* getImageStruct(bool transferOwnership);

void* getStruct();

this(GtkImage* gtkImage, bool ownedRef);

this(StockID stockID, GtkIconSize size);

static GType getType();

this();

this(PixbufAnimation animation);

this(string filename);

this(IconIF icon, GtkIconSize size);

this(string iconName, GtkIconSize size);

this(IconSet iconSet, GtkIconSize size);

this(Pixbuf pixbuf);

this(Surface surface);

void clear();

PixbufAnimation getAnimation();

void getGicon(IconIF gicon, GtkIconSize size);

void getIconName(string iconName, GtkIconSize size);

void getIconSet(IconSet iconSet, GtkIconSize size);

Pixbuf getPixbuf();

int getPixelSize();

void getStock(string stockId, GtkIconSize size);

GtkImageType getStorageType();

void setFromAnimation(PixbufAnimation animation);

void setFromFile(string filename);

void setFromGicon(IconIF icon, GtkIconSize size);

void setFromIconName(string iconName, GtkIconSize size);

void setFromIconSet(IconSet iconSet, GtkIconSize size);

void setFromPixbuf(Pixbuf pixbuf);

void setFromResource(string resourcePath);

void setFromStock(string stockId, GtkIconSize size);

void setFromSurface(Surface surface);

void setPixelSize(int pixelSize);

}

Constructors

this this(GtkImage* gtkImage, bool ownedRef): Sets our main struct and passes it to the parent class.
this this(StockID stockID, GtkIconSize size): Creates a Image displaying a stock icon. Sample stock icon names are StockID.OPEN, StockID.EXIT. Sample stock sizes are IconSize.MENU, IconSize.SMALL_TOOLBAR. If the stock icon name isn't known, the image will be empty. You can register your own stock icon names, see gtk.IconFactory.IconFactory.addDefault() and gtk.IconFactory.IconFactory.add().
this this(): Creates a new empty #GtkImage widget.
this this(PixbufAnimation animation): Creates a #GtkImage displaying the given animation. The #GtkImage does not assume a reference to the animation; you still need to unref it if you own references. #GtkImage will add its own reference rather than adopting yours.
this this(string filename): Creates a new #GtkImage displaying the file @filename. If the file isn’t found or can’t be loaded, the resulting #GtkImage will display a “broken image” icon. This function never returns %NULL, it always returns a valid #GtkImage widget.
this this(IconIF icon, GtkIconSize size): Creates a #GtkImage displaying an icon from the current icon theme. If the icon name isn’t known, a “broken image” icon will be displayed instead. If the current icon theme is changed, the icon will be updated appropriately.
this this(string iconName, GtkIconSize size): Creates a #GtkImage displaying an icon from the current icon theme. If the icon name isn’t known, a “broken image” icon will be displayed instead. If the current icon theme is changed, the icon will be updated appropriately.
this this(IconSet iconSet, GtkIconSize size): Creates a #GtkImage displaying an icon set. Sample stock sizes are #GTK_ICON_SIZE_MENU, #GTK_ICON_SIZE_SMALL_TOOLBAR. Instead of using this function, usually it’s better to create a #GtkIconFactory, put your icon sets in the icon factory, add the icon factory to the list of default factories with gtk_icon_factory_add_default(), and then use gtk_image_new_from_stock(). This will allow themes to override the icon you ship with your application.
this this(Pixbuf pixbuf): Creates a new #GtkImage displaying @pixbuf. The #GtkImage does not assume a reference to the pixbuf; you still need to unref it if you own references. #GtkImage will add its own reference rather than adopting yours.
this this(Surface surface): Creates a new #GtkImage displaying @surface. The #GtkImage does not assume a reference to the surface; you still need to unref it if you own references. #GtkImage will add its own reference rather than adopting yours.

Members

Functions

clear void clear(): Resets the image to be empty.
getAnimation PixbufAnimation getAnimation(): Gets the #GdkPixbufAnimation being displayed by the #GtkImage. The storage type of the image must be %GTK_IMAGE_EMPTY or %GTK_IMAGE_ANIMATION (see gtk_image_get_storage_type()). The caller of this function does not own a reference to the returned animation.
getGicon void getGicon(IconIF gicon, GtkIconSize size): Gets the #GIcon and size being displayed by the #GtkImage. The storage type of the image must be %GTK_IMAGE_EMPTY or %GTK_IMAGE_GICON (see gtk_image_get_storage_type()). The caller of this function does not own a reference to the returned #GIcon.
getIconName void getIconName(string iconName, GtkIconSize size): Gets the icon name and size being displayed by the #GtkImage. The storage type of the image must be %GTK_IMAGE_EMPTY or %GTK_IMAGE_ICON_NAME (see gtk_image_get_storage_type()). The returned string is owned by the #GtkImage and should not be freed.
getIconSet void getIconSet(IconSet iconSet, GtkIconSize size): Gets the icon set and size being displayed by the #GtkImage. The storage type of the image must be %GTK_IMAGE_EMPTY or %GTK_IMAGE_ICON_SET (see gtk_image_get_storage_type()).
getImageStruct GtkImage* getImageStruct(bool transferOwnership): Get the main Gtk struct
getPixbuf Pixbuf getPixbuf(): Gets the #GdkPixbuf being displayed by the #GtkImage. The storage type of the image must be %GTK_IMAGE_EMPTY or %GTK_IMAGE_PIXBUF (see gtk_image_get_storage_type()). The caller of this function does not own a reference to the returned pixbuf.
getPixelSize int getPixelSize(): Gets the pixel size used for named icons.
getStock void getStock(string stockId, GtkIconSize size): Gets the stock icon name and size being displayed by the #GtkImage. The storage type of the image must be %GTK_IMAGE_EMPTY or %GTK_IMAGE_STOCK (see gtk_image_get_storage_type()). The returned string is owned by the #GtkImage and should not be freed.
getStorageType GtkImageType getStorageType(): Gets the type of representation being used by the #GtkImage to store image data. If the #GtkImage has no image data, the return value will be %GTK_IMAGE_EMPTY.
getStruct void* getStruct(): the main Gtk struct as a void*
setFromAnimation void setFromAnimation(PixbufAnimation animation): Causes the #GtkImage to display the given animation (or display nothing, if you set the animation to %NULL).
setFromFile void setFromFile(string filename): See gtk_image_new_from_file() for details.
setFromGicon void setFromGicon(IconIF icon, GtkIconSize size): See gtk_image_new_from_gicon() for details.
setFromIconName void setFromIconName(string iconName, GtkIconSize size): See gtk_image_new_from_icon_name() for details.
setFromIconSet void setFromIconSet(IconSet iconSet, GtkIconSize size): See gtk_image_new_from_icon_set() for details.
setFromPixbuf void setFromPixbuf(Pixbuf pixbuf): See gtk_image_new_from_pixbuf() for details.
setFromResource void setFromResource(string resourcePath): See gtk_image_new_from_resource() for details.
setFromStock void setFromStock(string stockId, GtkIconSize size): See gtk_image_new_from_stock() for details.
setFromSurface void setFromSurface(Surface surface): See gtk_image_new_from_surface() for details.
setPixelSize void setPixelSize(int pixelSize): Sets the pixel size to use for named icons. If the pixel size is set to a value != -1, it is used instead of the icon size set by gtk_image_set_from_icon_name().

Static functions

getType GType getType()

Variables

gtkImage GtkImage* gtkImage;: the main Gtk struct

Inherited Members

From Misc

gtkMisc GtkMisc* gtkMisc;: the main Gtk struct
getMiscStruct GtkMisc* getMiscStruct(bool transferOwnership): Get the main Gtk struct
getStruct void* getStruct(): the main Gtk struct as a void*
getType GType getType()
getAlignment void getAlignment(float xalign, float yalign): Gets the X and Y alignment of the widget within its allocation. See gtk_misc_set_alignment().
getPadding void getPadding(int xpad, int ypad): Gets the padding in the X and Y directions of the widget. See gtk_misc_set_padding().
setAlignment void setAlignment(float xalign, float yalign): Sets the alignment of the widget.
setPadding void setPadding(int xpad, int ypad): Sets the amount of space to add around the widget.