dcGraphicsContext

Inheritance Diagram

Inheritance diagram for class dcGraphicsContext

Methods Summary

__init__	The incoming co-ordinates have a bottom left origin with increasing
ConcatTransform	Modifies the current transformation matrix by applying matrix
Create	The created pGraphicsContext instance uses the dc itself
CreateMatrix	Create a new matrix object.
CreatePath	Create a new path obejct.
DrawBitmap	Draw the bitmap at (x,y), ignoring w, h
DrawPath	Draws the path using current pen and brush.
DrawText	Set the dc font at the required size.
FillPath	Fills the path using the current brush.
PopState	Restore the most recently saved state which was saved with PushState.
PushState	Makes a copy of the current state of the context and saves it
Scale	Sets the dc userscale factor
SetBrush	Set the Brush to be used for filling shapes in future drawing
SetFont	Sets the wx.Font to be used for drawing text.
SetPen	Set the wx.Pen to be used for stroking lines in future drawing
StrokePath	Strokes the path (draws the lines) using the current pen.

Class API

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class dcGraphicsContext(object)

Methods

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__init__(self, context=None, yoffset=0, have_cairo=False)

The incoming co-ordinates have a bottom left origin with increasing y downwards (so y values are all negative). The DC origin is top left also with increasing y down. yoffset informs us of the page height. wx.DC and wx.GraphicsContext fonts are too big in the ratio of pixels per inch to points per inch. If screen rendering used Cairo, printed fonts need to be scaled but if wx.GC was used, they are already scaled

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ConcatTransform(self, matrix)

Modifies the current transformation matrix by applying matrix as an additional transformation.

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static Create(dc, yoffset, have_cairo)

The created pGraphicsContext instance uses the dc itself

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CreateMatrix(self, a=1.0, b=0, c=0, d=1.0, tx=0, ty=0)

Create a new matrix object.

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CreatePath(self)

Create a new path obejct.

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DrawBitmap(self, bmp, x, y, w=-1, h=-1)

Draw the bitmap at (x,y), ignoring w, h

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DrawPath(self, path, fillStyle=ODDEVEN_RULE)

Draws the path using current pen and brush.

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DrawText(self, text, x, y, backgroundBrush=None)

Set the dc font at the required size. Ensure original font is not altered Draw the text at (x,y) using the current font. Ignore backgroundBrush

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FillPath(self, path, fillStyle=ODDEVEN_RULE)

Fills the path using the current brush.

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PopState(self)

Restore the most recently saved state which was saved with PushState.

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PushState(self)

Makes a copy of the current state of the context and saves it on an internal stack of saved states. The saved state will be restored when PopState is called.

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Scale(self, xScale, yScale)

Sets the dc userscale factor

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SetBrush(self, brush)

Set the Brush to be used for filling shapes in future drawing operations.

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SetFont(self, font, colour=None)

Sets the wx.Font to be used for drawing text. Don’t set the dc font yet as it may need to be scaled

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SetPen(self, pen)

Set the wx.Pen to be used for stroking lines in future drawing operations.

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StrokePath(self, path)

Strokes the path (draws the lines) using the current pen.