Object PmgCanvas (Drawing canvas)
Description:
See:
PmgCanvas - Deatiled object description
The
PmgCanvas object allows to draw both veri simple and complex animated shapes in 2D graphics. The drawing is controlled by script (
JavaScript) in the
onDraw event and by using the methods and properties of the
CanvasCtx drawing area (eventually by extension object
CanvasCtxExt). It allows to draw simple images (for example icons), but also complex animated graphics (animated meters, etc.).
This object adopts properties and methods of object
PmgObject.
History:
Pm9.00.00: Object name changed:
PmiCanvas ->
PmgCanvas Pm8.03.28:
Fixed bug: The read value of the color (for example of the
strokeStyle property) was incorrect.
Pm8.03.13:
Fixed bug: Memory decrease occured if methods
save and
restore were not called correctly (not in pair).
Pm8.03.08: New simple
drawing tool has been created. This way it is possible to draw the canvas object and the editor then transforms it to script.
This tool will be developed further in future versions in order to provide more graphic functions and also to read and render canvas scripts.
The canvas drawing tool can now be opened from following locations:
Pm8.03.04:
- On the "
Draw" page it is now possible to create
assistant methods for drawing. In the
onDraw event it is no longer neede to write the whole drawing script, but assistant methods can be called. This way the drawing script becomes much simpler.
-
New CanvasCtxExt object for drawing. This object adds the functions of deformation rotation transformations. This object Objekt can be accessed via the
pEvent.CtxExt parameter.