Class ProgressBar

  • All Implemented Interfaces:
    Drawable

    public class ProgressBar
    extends Control
    Instances of the receiver represent an unselectable user interface object that is used to display progress, typically in the form of a bar.
    Styles:
    SMOOTH, HORIZONTAL, VERTICAL, INDETERMINATE
    Events:
    (none)

    Note: Only one of the styles HORIZONTAL and VERTICAL may be specified.

    IMPORTANT: This class is not intended to be subclassed.

    See Also:
    ProgressBar snippets, SWT Example: ControlExample, Sample code and further information
    Restriction:
    This class is not intended to be subclassed by clients.
    • Constructor Detail

      • ProgressBar

        public ProgressBar​(Composite parent,
                           int style)
        Constructs a new instance of this class given its parent and a style value describing its behavior and appearance.

        The style value is either one of the style constants defined in class SWT which is applicable to instances of this class, or must be built by bitwise OR'ing together (that is, using the int "|" operator) two or more of those SWT style constants. The class description lists the style constants that are applicable to the class. Style bits are also inherited from superclasses.

        Parameters:
        parent - a composite control which will be the parent of the new instance (cannot be null)
        style - the style of control to construct
        Throws:
        IllegalArgumentException -
        • ERROR_NULL_ARGUMENT - if the parent is null
        SWTException -
        • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
        • ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
        See Also:
        SWT.SMOOTH, SWT.HORIZONTAL, SWT.VERTICAL, SWT.INDETERMINATE, Widget.checkSubclass(), Widget.getStyle()
    • Method Detail

      • getMaximum

        public int getMaximum()
        Returns the maximum value which the receiver will allow.
        Returns:
        the maximum
        Throws:
        SWTException -
        • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
        • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • getMinimum

        public int getMinimum()
        Returns the minimum value which the receiver will allow.
        Returns:
        the minimum
        Throws:
        SWTException -
        • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
        • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • getSelection

        public int getSelection()
        Returns the single 'selection' that is the receiver's position.
        Returns:
        the selection
        Throws:
        SWTException -
        • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
        • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • getState

        public int getState()
        Returns the state of the receiver. The value will be one of:
        Returns:
        the state
        Throws:
        SWTException -
        • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
        • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
        Since:
        3.4
      • setMaximum

        public void setMaximum​(int value)
        Sets the maximum value that the receiver will allow. This new value will be ignored if it is not greater than the receiver's current minimum value. If the new maximum is applied then the receiver's selection value will be adjusted if necessary to fall within its new range.
        Parameters:
        value - the new maximum, which must be greater than the current minimum
        Throws:
        SWTException -
        • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
        • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • setMinimum

        public void setMinimum​(int value)
        Sets the minimum value that the receiver will allow. This new value will be ignored if it is negative or is not less than the receiver's current maximum value. If the new minimum is applied then the receiver's selection value will be adjusted if necessary to fall within its new range.
        Parameters:
        value - the new minimum, which must be nonnegative and less than the current maximum
        Throws:
        SWTException -
        • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
        • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • setSelection

        public void setSelection​(int value)
        Sets the single 'selection' that is the receiver's position to the argument which must be greater than or equal to zero.
        Parameters:
        value - the new selection (must be zero or greater)
        Throws:
        SWTException -
        • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
        • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
      • setState

        public void setState​(int state)
        Sets the state of the receiver. The state must be one of these values:

        Note: This operation is a hint and is not supported on platforms that do not have this concept.

        Parameters:
        state - the new state
        Throws:
        SWTException -
        • ERROR_WIDGET_DISPOSED - if the receiver has been disposed
        • ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
        Since:
        3.4