gdkWindowNew(parent = NULL, attributes)
gdkWindowDestroy(object)
gdkWindowGetWindowType(object)
gdkWindowAtPointer()
gdkWindowShow(object)
gdkWindowShowUnraised(object)
gdkWindowHide(object)
gdkWindowIsVisible(object)
gdkWindowIsViewable(object)
gdkWindowGetState(object)
gdkWindowWithdraw(object)
gdkWindowIconify(object)
gdkWindowDeiconify(object)
gdkWindowStick(object)
gdkWindowUnstick(object)
gdkWindowMaximize(object)
gdkWindowUnmaximize(object)
gdkWindowFullscreen(object)
gdkWindowUnfullscreen(object)
gdkWindowSetKeepAbove(object, setting)
gdkWindowSetKeepBelow(object, setting)
gdkWindowSetOpacity(object, opacity)
gdkWindowSetComposited(object, composited)
gdkWindowMove(object, x, y)
gdkWindowResize(object, width, height)
gdkWindowMoveResize(object, x, y, width, height)
gdkWindowScroll(object, dx, dy)
gdkWindowMoveRegion(object, region, x, y)
gdkWindowReparent(object, new.parent, x, y)
gdkWindowClear(object)
gdkWindowClearArea(object, x, y, width, height)
gdkWindowClearAreaE(object, x, y, width, height)
gdkWindowRaise(object)
gdkWindowLower(object)
gdkWindowFocus(object, timestamp = "GDK_CURRENT_TIME")
gdkWindowRegisterDnd(object)
gdkWindowBeginResizeDrag(object, edge, button, root.x, root.y, timestamp)
gdkWindowBeginMoveDrag(object, button, root.x, root.y, timestamp)
gdkWindowConstrainSize(geometry, width, height)
gdkWindowBeep(object)
gdkWindowBeginPaintRect(object, rectangle)
gdkWindowBeginPaintRegion(object, region)
gdkWindowEndPaint(object)
gdkWindowInvalidateRect(object, rect = NULL, invalidate.children)
gdkWindowInvalidateRegion(object, region, invalidate.children)
gdkWindowInvalidateMaybeRecurse(object, region, child.func, user.data)
gdkWindowGetUpdateArea(object)
gdkWindowFreezeUpdates(object)
gdkWindowThawUpdates(object)
gdkWindowProcessAllUpdates()
gdkWindowProcessUpdates(object, update.children)
gdkWindowSetDebugUpdates(setting)
gdkWindowGetInternalPaintInfo(object)
gdkWindowEnableSynchronizedConfigure(object)
gdkWindowConfigureFinished(object)
gdkWindowSetUserData(object, user.data = NULL)
gdkWindowSetOverrideRedirect(object, override.redirect)
gdkWindowSetAcceptFocus(object, accept.focus)
gdkWindowSetFocusOnMap(object, focus.on.map)
gdkWindowAddFilter(object, fun, data)
gdkWindowRemoveFilter(object, fun, data)
gdkWindowShapeCombineMask(object, shape.mask = NULL, offset.x, offset.y)
gdkWindowShapeCombineRegion(object, shape.region = NULL, offset.x, offset.y)
gdkWindowSetChildShapes(object)
gdkWindowMergeChildShapes(object)
gdkWindowInputShapeCombineMask(object, mask, x, y)
gdkWindowInputShapeCombineRegion(object, shape.region, offset.x, offset.y)
gdkWindowSetChildInputShapes(object)
gdkWindowMergeChildInputShapes(object)
gdkWindowSetStaticGravities(object, use.static)
gdkWindowSetHints(object, x, y, min.width, min.height, max.width, max.height, flags)
gdkWindowSetTitle(object, title)
gdkWindowSetBackground(object, color)
gdkWindowSetBackPixmap(object, pixmap = NULL, parent.relative)
gdkWindowSetCursor(object, cursor = NULL)
gdkWindowGetUserData(object)
gdkWindowGetGeometry(object)
gdkWindowSetGeometryHints(object, geometry)
gdkWindowSetIconList(object, pixbufs)
gdkWindowSetModalHint(object, modal)
gdkWindowSetTypeHint(object, hint)
gdkWindowGetTypeHint(object)
gdkWindowSetSkipTaskbarHint(object, modal)
gdkWindowSetSkipPagerHint(object, modal)
gdkWindowSetUrgencyHint(object, urgent)
gdkWindowGetPosition(object)
gdkWindowGetRootOrigin(object)
gdkWindowGetFrameExtents(object)
gdkWindowGetOrigin(object)
gdkWindowGetDeskrelativeOrigin(object)
gdkWindowGetPointer(object)
gdkWindowGetParent(object)
gdkWindowGetToplevel(object)
gdkWindowGetChildren(object)
gdkWindowPeekChildren(object)
gdkWindowGetEvents(object)
gdkWindowSetEvents(object, event.mask)
gdkWindowSetIcon(object, icon.window, pixmap, mask)
gdkWindowSetIconName(object, name)
gdkWindowSetTransientFor(object, leader)
gdkWindowSetRole(object, role)
gdkWindowSetStartupId(object, startup.id)
gdkWindowSetGroup(object, leader)
gdkWindowGetGroup(object)
gdkWindowSetDecorations(object, decorations)
gdkWindowGetDecorations(object)
gdkWindowSetFunctions(object, functions)
gdkWindowGetToplevels()
gdkGetDefaultRootWindow()
gdkSetPointerHooks(object, new.hooks)
gdkWindow(parent = NULL, attributes)return(FALSE) }
# The expose event handler for the window. # # This function performs the actual compositing of the event box onto # the already-existing background of the window at 50% normal opacity. # # In this case we do not want app-paintable to be set on the widget # since we want it to draw its own (red) background. Because of this, # however, we must ensure that we set after = TRUE when connecting to the signal # so that this handler is called after the red has been drawn. If it was # called before then GTK would just blindly paint over our work. # # Note: if the child window has children, then you need a cairo 1.16 # feature to make this work correctly. #
window_expose_event <- function(widget, event) { # get our child (in this case, the event box) child <- widget$getChild()
# create a cairo context to draw to the window cr <- gdkCairoCreate(widget$window)
# the source data is the (composited) event box gdkCairoSetSourcePixmap(cr, child$window, child$allocation$x, child$allocation$y)
# draw no more than our expose event intersects our child region <- gdkRegionRectangle(child$allocation) region$intersect(event$region) gdkCairoRegion(cr, region) cr$clip()
# composite, with a 50% opacity cr$setOperator("over") cr$paintWithAlpha(0.5)
return(FALSE) }
# Make the widgets button <- gtkButton("A Button") event <- gtkEventBox() window <- gtkWindow()
# Put a red background on the window red <- gdkColorParse("red")$color window$modifyBg("normal", red)
# Set the colormap for the event box. # Must be done before the event box is realized. # screen <- event$getScreen() rgba <- screen$getRgbaColormap() event$setColormap(rgba)
# Set our event box to have a fully-transparent background # drawn on it. Currently there is no way to simply tell GTK+ # that "transparency" is the background color for a widget. # event$setAppPaintable(TRUE) gSignalConnect(event, "expose-event", transparent_expose)
# Put them inside one another window$setBorderWidth(10) window$add(event) event$add(button)
# Set the event box GdkWindow to be composited. # Obviously must be performed after event box is realized. # event$window$setComposited(TRUE)
# Set up the compositing handler.
# Note that we do _after_ so that the normal (red) background is drawn
# by gtk before our compositing occurs.
#
gSignalConnect(window, "expose-event", window_expose_event, after = TRUE)
In the example , a button is
placed inside of an event box inside of a window. The event box is
set as composited and therefore is no longer automatically drawn to
the screen.
When the contents of the event box change, an expose event is
generated on its parent window (which, in this case, belongs to
the toplevel
gdkWindow is the equivalent of gdkWindowNew.