| Maintainer | gtk2hs-users@lists.sourceforge.net |
|---|---|
| Stability | provisional |
| Portability | portable (depends on GHC) |
| Safe Haskell | None |
| Language | Haskell98 |
Graphics.UI.Gtk.Display.ProgressBar
Description
A widget which indicates progress visually
- data ProgressBar
- class WidgetClass o => ProgressBarClass o
- castToProgressBar :: GObjectClass obj => obj -> ProgressBar
- gTypeProgressBar :: GType
- toProgressBar :: ProgressBarClass o => o -> ProgressBar
- progressBarNew :: IO ProgressBar
- progressBarPulse :: ProgressBarClass self => self -> IO ()
- progressBarSetText :: (ProgressBarClass self, GlibString string) => self -> string -> IO ()
- progressBarSetFraction :: ProgressBarClass self => self -> Double -> IO ()
- progressBarSetPulseStep :: ProgressBarClass self => self -> Double -> IO ()
- progressBarGetFraction :: ProgressBarClass self => self -> IO Double
- progressBarGetPulseStep :: ProgressBarClass self => self -> IO Double
- progressBarGetText :: (ProgressBarClass self, GlibString string) => self -> IO (Maybe string)
- progressBarSetEllipsize :: ProgressBarClass self => self -> EllipsizeMode -> IO ()
- progressBarGetEllipsize :: ProgressBarClass self => self -> IO EllipsizeMode
- progressBarDiscreteBlocks :: ProgressBarClass self => Attr self Int
- progressBarFraction :: ProgressBarClass self => Attr self Double
- progressBarPulseStep :: ProgressBarClass self => Attr self Double
- progressBarText :: (ProgressBarClass self, GlibString string) => ReadWriteAttr self (Maybe string) string
- progressBarEllipsize :: ProgressBarClass self => Attr self EllipsizeMode
Detail
The ProgressBar is typically used to display the progress of a long
running operation. It provides a visual clue that processing is underway.
The ProgressBar can be used in two different modes: percentage mode and
activity mode.
When an application can determine how much work needs to take place (e.g.
read a fixed number of bytes from a file) and can monitor its progress, it
can use the ProgressBar in percentage mode and the user sees a growing bar
indicating the percentage of the work that has been completed. In this mode,
the application is required to call progressBarSetFraction periodically to
update the progress bar.
When an application has no accurate way of knowing the amount of work to
do, it can use the ProgressBar in activity mode, which shows activity by a
block moving back and forth within the progress area. In this mode, the
application is required to call progressBarPulse perodically to update the
progress bar.
There is quite a bit of flexibility provided to control the appearance of
the ProgressBar. Functions are provided to control the orientation of the
bar, optional text can be displayed along with the bar, and the step size
used in activity mode can be set.
Class Hierarchy
Types
data ProgressBar Source
class WidgetClass o => ProgressBarClass o Source
Instances
castToProgressBar :: GObjectClass obj => obj -> ProgressBar Source
toProgressBar :: ProgressBarClass o => o -> ProgressBar Source
Constructors
progressBarNew :: IO ProgressBar Source
Creates a new ProgressBar.
Methods
progressBarPulse :: ProgressBarClass self => self -> IO () Source
Indicates that some progress is made, but you don't know how much. Causes
the progress bar to enter "activity mode", where a block bounces back and
forth. Each call to progressBarPulse causes the block to move by a little
bit (the amount of movement per pulse is determined by
progressBarSetPulseStep).
progressBarSetText :: (ProgressBarClass self, GlibString string) => self -> string -> IO () Source
Causes the given text to appear superimposed on the progress bar.
Arguments
| :: ProgressBarClass self | |
| => self | |
| -> Double |
|
| -> IO () |
Causes the progress bar to "fill in" the given fraction of the bar. The fraction should be between 0.0 and 1.0, inclusive.
progressBarSetPulseStep Source
Arguments
| :: ProgressBarClass self | |
| => self | |
| -> Double |
|
| -> IO () |
Sets the fraction of total progress bar length to move the bouncing block
for each call to progressBarPulse.
Arguments
| :: ProgressBarClass self | |
| => self | |
| -> IO Double | returns a fraction from 0.0 to 1.0 |
Returns the current fraction of the task that's been completed.
progressBarGetPulseStep Source
Arguments
| :: ProgressBarClass self | |
| => self | |
| -> IO Double | returns a fraction from 0.0 to 1.0 |
Retrieves the pulse step set with progressBarSetPulseStep
Arguments
| :: (ProgressBarClass self, GlibString string) | |
| => self | |
| -> IO (Maybe string) | returns text, or |
Retrieves the text displayed superimposed on the progress bar, if any,
otherwise Nothing.
progressBarSetEllipsize :: ProgressBarClass self => self -> EllipsizeMode -> IO () Source
Sets the mode used to ellipsize (add an ellipsis: "...") the text if there is not enough space to render the entire string.
- Available since Gtk+ version 2.6
progressBarGetEllipsize :: ProgressBarClass self => self -> IO EllipsizeMode Source
Returns the ellipsizing position of the progressbar. See
progressBarSetEllipsize.
- Available since Gtk+ version 2.6
Attributes
progressBarDiscreteBlocks :: ProgressBarClass self => Attr self Int Source
The number of discrete blocks in a progress bar (when shown in the discrete style).
Allowed values: >= 2
Default value: 10
progressBarFraction :: ProgressBarClass self => Attr self Double Source
The fraction of total work that has been completed.
Allowed values: [0,1]
Default value: 0
progressBarPulseStep :: ProgressBarClass self => Attr self Double Source
The fraction of total progress to move the bouncing block when pulsed.
Allowed values: [0,1]
Default value: 0.1
progressBarText :: (ProgressBarClass self, GlibString string) => ReadWriteAttr self (Maybe string) string Source
Text to be displayed in the progress bar.
Default value: "%P %%"
progressBarEllipsize :: ProgressBarClass self => Attr self EllipsizeMode Source
The preferred place to ellipsize the string, if the progressbar does not
have enough room to display the entire string, specified as a
EllipsizeMode.
Note that setting this property to a value other than EllipsizeNone has
the side-effect that the progressbar requests only enough space to display
the ellipsis "...". Another means to set a progressbar's width is
widgetSetSizeRequest.
Default value: EllipsizeNone