comp • gb.qt4 • draw

Draw (gb.qt4)

This class is used for drawing on a Picture, or a DrawingArea object.

Before starting drawing anything, you must call the Begin method by passing it the object where you want to draw.

Then you can call any of the drawing methods to draw points, lines, texts, pictures...

When your drawing is finished, you must call the End method.

You cannot draw on a DrawingArea outside of its Draw event handler, unless its Cached property is set. In that case, the DrawingArea acts like a Picture.

Since 3.4

The Draw class is deprecated since Gambas 3.4. It is now emulated through the Paint class.

This class is static.

Static properties

Static methods Constants
Returns or sets the background color used for drawing brushes or text.
Background  
Returns a virtual object used for managing the clipping area of a drawing.
Clip  
Return or set the clipping rectangle.
ClipRect  
Returns the device being drawn.
Device  
Returns or sets the color used by filling drawing methods.
FillColor  
Returns or sets the style used by filling drawing methods.
FillStyle  
Returns or sets the horizontal origin of the brushes used by filling drawing methods.
FillX  
Returns or sets the vertical origin of the brushes used by filling drawing methods.
FillY  
Returns or sets the font used for drawing texts.
Font  
Returns or sets the foreground color used for drawing brushes, text and lines.
Foreground  
A synonymous for the Height property.
H  
Returns the height of the area that can be drawn.
Height  
Indicates that all drawing primitives combine their pixel colors with the pixel colors of the destination with an exclusive or operation.
Invert  
Returns or sets the style used for drawing lines.
LineStyle  
Returns or sets the width used for drawing lines.
LineWidth  
Returns a virtual class that groups the style drawing methods together.
Style  
Indicates that some drawing methods like Draw.Text are transparent, i.e. that they do not fill their background.
Transparent  
A synonymous for the Width property.
W  
Returns the width of the area that can be drawn.
Width  
Draw an arc.
Arc  
Begins a new drawing. The device can be one of the following objects:
Begin  
Draw a circle or a pie.
Circle  
Clears the drawing device with the background color.
Clear  
Draw an ellipse or a pie.
Ellipse  
Ends a drawing.
End  
Fills the specified rectangle with the specified color.
FillRect  
Draws an Image, or part of it.
Image  
Draws a line.
Line  
Draws a Picture, or part of it.
Picture  
Draws a single pixel.
Point  
Draws a polyline, i.e. a void polygon.
PolyLine  
Draws a polygon.
Polygon  
Draws a rectangle.
Rect  
Resets the transformation matrix.
Reset  
Restore the state of all drawing properties that were previously saved by the Save method.
Restore  
Draws a piece of rich text.
RichText  
Returns the height of a piece of rich text.
RichTextHeight  
Returns the width of a piece of rich text.
RichTextWidth  
Saves the state of all drawing properties.
Save  
Modify the transformation matrix so that drawing are scaled by the specified vector.
Scale  
Draws a text.
Text  
Returns the height of a text drawing.
TextHeight  
Returns the width of a text drawing.
TextWidth  
Draws a tiled picture.
Tile  
Modify the transformation matrix so that drawing are translated by the specified vector.
Translate  
Zoom  
This constant is used by the style methods for drawing a control in its disable state.
Disabled  
This constant is used by the style methods for drawing a control having the focus.
Focus  
This constant is used by the style methods for drawing a control hovered by the mouse cursor.
Hover  
This constant is used by the style methods for drawing a control in its active state.
Normal