Drawing Rectangles in Canvas Programming

What does the function Rect(left, top, width, height) do in the canvas?

What is the default fill color for shapes drawn on the canvas if none is specified?

What effect does setting the dashes argument to True have on the border of a rectangle?

How would you draw a rectangle with a green border and a specified border width of 4?

If you want to create a rectangle with a dashed green border of 1 pixel dashes and 4 pixel gaps, what is the correct function call?

What is required to create a custom RGB color using the rgb function?

Explain the difference between a radial gradient and a linear gradient in shape drawing.

What happens to shapes that are drawn first in the canvas?

If you want to disable the fill of a rectangle, how should you set the fill argument?

What is the purpose of the borderWidth argument in the Rect function?

Canvas and Coordinates

Canvas dimensions are 400 x 400 pixels.
Coordinates are indicated by (x, y) points; x-values increase to the right, y-values increase downwards.

Drawing Rectangles

Use Rect(left, top, width, height) to draw rectangles.
The fill color can be set using the optional fill argument; defaults to 'black'.
To omit filling, use fill=None.

Drawing Order

Shapes are drawn in the order created; later shapes overlap earlier ones.

Borders and Border Width

To add a border, use the border property; for example, Rect(..., border='green').
Border width can be customized with borderWidth; default value is 2, for example: Rect(..., border='green', borderWidth=4).

Dashes

Dashes can be enabled with dashes=True.
Custom dash patterns can be defined using pairs of values (dashWidth, gapWidth), such as (1, 4).

Color and Gradients

Use predefined color names or create custom colors with rgb(red, green, blue); each value ranges from 0 to 255.
Default gradient type is radial, which transitions from the center outwards; can use at least two colors (gradient('red', 'green', 'blue')).
Linear gradients can start from a specific edge, e.g. gradient('red', 'green', 'blue', start='left-top').

Opacity

Opacity indicates how transparent a shape is, ranging from 0 (completely transparent) to 100 (completely opaque).

Shapes Overview

Rectangles are drawn using Rect(left, top, width, height).
Ovals are created with Oval(centerX, centerY, width, height).
Circles can be drawn using Circle(centerX, centerY, radius); identical to an oval where width equals height.
Lines are drawn with Line(x1, y1, x2, y2); line thickness can be modified with lineWidth, which defaults to 2.

This quiz focuses on the concepts of position and size when drawing rectangles on a canvas. You will learn about the coordinates, fill colors, and how the drawing order affects visibility. Test your understanding of the Rect function and its parameters.