Picture (gb.qt4)
This class represents a picture.
The picture contents are stored in the display server, not in the
process memory like an
Image.
Even if the underlying toolkit does not completely manage transparency yet, each picture can have
a mask. This feature can be set explicitly at picture instantiation,
or implicitly when loading an image file that has transparency like PNG.
When drawing on a picture having a mask, the picture and the mask are
modified accordingly.
Statische Methoden
Flush
|
Flushes the internal picture cache.
|
FromString
|
Create a picture from the contents of a string.
|
Load
|
Loads a picture from the disk.
|
Refresh
|
Trigger a redraw of the control.
|
Eigenschaften
Depth
|
Returns the color depth of the picture.
|
H
|
A synonymous for the Height property.
|
Height
|
Returns the height of the picture.
|
Image
|
Converts the picture into an image and returns it.
|
Transparent
|
Returns or sets if the picture has a mask.
|
W
|
A synonymous for the Width property.
|
Width
|
Returns the width of the picture.
|
Methoden
Clear
|
Clears the picture.
|
Copy
|
Returns a copy of the picture, or a copy of a part of the picture.
|
Fill
|
Fills the picture with the specified color.
|
Resize
|
Resizes a picture.
|
Save
|
Saves a picture to the disk. The file extension of Path will give the format
of the saved image.
|
Stretch
|
Return a stretched copy of a picture.
|
ToString
|
Save an image as a string.
|
Tip:
Calling something like...
Picture["/tmp/TemporaryPicture.png"]
will load the picture from the disk if it has not already done so.
If it
has already loaded this picture calling the same file path again will load the cached picture from the display server and not from disk.
If you wish to reload the same picture path from disk you must use the Picture.
Load(Path) method.
Picture.Load("/tmp/TemporaryPicture.png")
Warning about dark themes:
Using the Picture["filepath"] method to load a picture will convert it to dark theme (Image.Invert) if the system is using a dark theme.
If you wish to avoid this feature you must use the Picture.
Load("filepath") method instead.