| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108 |
- Scale Widget
- Header file Scale.h
- Class scaleWidgetClass
- Class Name Scale
- Superclass Simple
- The Scale widget is an immutable image displayed within a rectangular
- region of the screen. When the widget is selected, it is highlighted,
- and an application callback routine is invoked. When the
- widget is resized the image can be autoscaled to fit new size of the
- widget window. The widget can also cut and paste its contents.
- When creating a Scale widget instance, the following resources are
- retreived from the argument list or from the resource database:
- All the Simple Widget resources plus...
- -------------------------------------------------------------------------------
- Name Cass Type Default Value
- -------------------------------------------------------------------------------
- aspectRatio AspectRatio Float 1.0
- autoscale Autoscale Boolean True
- bufferSize BufferSize Cardinal 1024
- foreground Foreground Pixel XtDefaultForeground
- gravity Gravity XtGravity ForgetGravity
- image Image XImage* NULL
- internalHeight Height Dimension 2
- internalWidth Width Dimension 2
- pasteBuffer PasteBuffer Boolean False
- precision Precision Float 0.001
- proportional Proportional Boolean True
- resize Resize Boolean True
- scaleX ScaleFactor Float DefaultScaleValue
- scaleY ScaleFactor Float DefaultScaleValue
- exponent Exponent integer -3
- -------------------------------------------------------------------------------
- aspectRatio This resource specifies the aspect ratio of the scaled image
- in the x / y * aspectRatio = 1 form. It is effective within
- the precision resource only if proportional resource is set
- to true. AspectRatio resource can be any positive number
- greater than zero.
- autoscale If this resource is set to True then the image will be
- autoscaled to fit the window size within internal width
- and internal height resource values. If the resource is
- False, the widget will only reposition the image
- according to the gravity resource value.
- bufferSize This resource specifies the buffer size in XRectangle's for
- buffering the XFillRectangle calls. It is effective only
- for XYBitmap image type.
- background This resource has the same meaning as for the Simple widget.
- However, it is worth mentioning that if the most frequent
- pixel value in the XYPixmap or ZPixmap image is specified
- as backgroud, the scaling process can be speeded up noticably.
- foreground The color used to paint the image if in XYBitmap format.
- If the image is XYPixmap or ZPixmap format, the foreground
- resource has no effect.
- gravity This resource will determine where to put the image if it does
- not fit the window size minus internal width and height.
- The widget will try to preserve gravity rather than internal
- width and height resources.
- image This is the image to be displayed in the widget window.
- If no image is desired, the NULL value can be passed.
- The passed image is copied and set to the resource value.
- Applications should destroy the passed image argument
- if they do not intend to use it at some later time.
- internalHeight
- internalWidth These resources specify the minimum distance from the boarder
- of the widget window to be maintanied when manipulating the
- image. If image is too big or small to satisfy given
- conditions, the widget will position the image to preserve
- gravity rather than internalWidth or internalHeight.
- pasteBuffer If this resource is true then the widget owns the paste
- selection buffer. This resource can only be queried.
- precision This resource specifies the precision of the scale factors
- when scaling the image. The precision resource can be any
- positive number greater than zero. (For example, if precision
- is 1.0 then the image will be scaled only by integer values.)
- proportional If this resource is set to true it will make sure that the
- image proportions, as specified by aspectRatio resource,
- are being kept whenever it is scaled.
-
- resize If this resource is true the widget will try to resize when
- addopting a new image thus preserveing the scale values.
- If it is false the scale values will not be preserved unless
- the image can fit in the current window size with the same
- scale values.
- scaleX
- scaleY These resources specify the scaling values for the widget
- image. They will be floored to satisfy precision resource
- values. If uniform resource is true the scale values will
- be only integers. These resources can be any positive number
- greater than zero.
- shiftFactor ...
|
