- addOnInvalidateContents
gulong addOnInvalidateContents(void delegate(PaintableIF) dlg, ConnectFlags connectFlags)
Emitted when the contents of the @paintable change.
- addOnInvalidateSize
gulong addOnInvalidateSize(void delegate(PaintableIF) dlg, ConnectFlags connectFlags)
Emitted when the intrinsic size of the @paintable changes.
- computeConcreteSize
void computeConcreteSize(double specifiedWidth, double specifiedHeight, double defaultWidth, double defaultHeight, double concreteWidth, double concreteHeight)
Compute a concrete size for the GdkPaintable.
- getCurrentImage
PaintableIF getCurrentImage()
Gets an immutable paintable for the current contents displayed by @paintable.
- getFlags
GdkPaintableFlags getFlags()
Get flags for the paintable.
- getIntrinsicAspectRatio
double getIntrinsicAspectRatio()
Gets the preferred aspect ratio the @paintable would like to be displayed at.
- getIntrinsicHeight
int getIntrinsicHeight()
Gets the preferred height the @paintable would like to be displayed at.
- getIntrinsicWidth
int getIntrinsicWidth()
Gets the preferred width the @paintable would like to be displayed at.
- getPaintableStruct
GdkPaintable* getPaintableStruct(bool transferOwnership)
- getStruct
void* getStruct()
the main Gtk struct as a void*
- invalidateContents
void invalidateContents()
Called by implementations of GdkPaintable to invalidate their contents.
- invalidateSize
void invalidateSize()
Called by implementations of GdkPaintable to invalidate their size.
- snapshot
void snapshot(Snapshot snapshot, double width, double height)
Snapshots the given paintable with the given @width and @height.
GdkPaintable is a simple interface used by GTK to represent content that can be painted.
The content of a GdkPaintable can be painted anywhere at any size without requiring any sort of layout. The interface is inspired by similar concepts elsewhere, such as ClutterContent, HTML/CSS Paint Sources, or SVG Paint Servers.
A GdkPaintable can be snapshot at any time and size using [method@Gdk.Paintable.snapshot]. How the paintable interprets that size and if it scales or centers itself into the given rectangle is implementation defined, though if you are implementing a GdkPaintable and don't know what to do, it is suggested that you scale your paintable ignoring any potential aspect ratio.
The contents that a GdkPaintable produces may depend on the [class@GdkSnapshot] passed to it. For example, paintables may decide to use more detailed images on higher resolution screens or when OpenGL is available. A GdkPaintable will however always produce the same output for the same snapshot.
A GdkPaintable may change its contents, meaning that it will now produce a different output with the same snapshot. Once that happens, it will call [method@Gdk.Paintable.invalidate_contents] which will emit the [signal@GdkPaintable::invalidate-contents] signal. If a paintable is known to never change its contents, it will set the %GDK_PAINTABLE_STATIC_CONTENTS flag. If a consumer cannot deal with changing contents, it may call [method@Gdk.Paintable.get_current_image] which will return a static paintable and use that.
A paintable can report an intrinsic (or preferred) size or aspect ratio it wishes to be rendered at, though it doesn't have to. Consumers of the interface can use this information to layout thepaintable appropriately. Just like the contents, the size of a paintable can change. A paintable will indicate this by calling [method@Gdk.Paintable.invalidate_size] which will emit the [signal@GdkPaintable::invalidate-size] signal. And just like for contents, if a paintable is known to never change its size, it will set the %GDK_PAINTABLE_STATIC_SIZE flag.
Besides API for applications, there are some functions that are only useful for implementing subclasses and should not be used by applications: [method@Gdk.Paintable.invalidate_contents], [method@Gdk.Paintable.invalidate_size], [func@Gdk.Paintable.new_empty].