dCircle (Function)

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dCircle (Function)

In french: dCercle

Draws a circle or an ellipse:

in an Image control,
Versions 17 and later
in an Image variable.
New in version 17
in an Image variable.
in an Image variable. in an Image variable.
This type of variable is not available.

Versions 16 and later

This function is now available for Android applications.

New in version 16

This function is now available for Android applications.

Versions 17 and later

This function is now available for iPhone/iPad applications.

New in version 17

This function is now available for iPhone/iPad applications.

Versions 19 and later

This function is now available in Windows Store Apps mode.

New in version 19

This function is now available in Windows Store Apps mode.

Versions 21 and later

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available in Universal Windows 10 App mode.

Versions 24 and later

The syntax that manages the Color type is now available for Android applications.

New in version 24

The syntax that manages the Color type is now available for Android applications.

Example

See additional examples

// Draw a circle whose background is light yellow and
// whose border is light blue in an Image control
dStartDrawing(IMG_Drawing)
dCircle(10, 10, 50, 50, LightYellow, LightBlue)

Versions 24 and later

// Draw a circle whose background is light yellow and
// whose border is light blue in an Image control
dCircle(IMG_Drawing, 10, 10, 50, 50, LightYellow, LightBlue)

New in version 24

// Draw a circle whose background is light yellow and
// whose border is light blue in an Image control
dCircle(IMG_Drawing, 10, 10, 50, 50, LightYellow, LightBlue)

Syntax

dCircle([<Image>, ] <X1> , <Y1> , <X2> , <Y2> [, <Background color> [, <Line color>]])

<Image>: Optional control name or optional Image variable

Versions 24 and later
Image to use. This image can correspond to:
the name of an Image control.
the name of an Image variable.
This type of variable is not available.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
New in version 24
Image to use. This image can correspond to:
the name of an Image control.
the name of an Image variable.
This type of variable is not available.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
Image to use. This image can correspond to:
the name of an Image control.
the name of an Image variable.
This type of variable is not available.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.

<X1>: Integer

X coordinate of top left corner of the rectangle containing the circle. These coordinates are expressed in pixels.

<Y1>: Integer

Y coordinate of top left corner of the rectangle containing the circle. These coordinates are expressed in pixels.

<X2>: Integer

X coordinate of bottom right corner of the rectangle containing the circle. These coordinates are expressed in pixels.

<Y2>: Integer

Y coordinate of bottom right corner of the rectangle containing the circle. These coordinates are expressed in pixels.

<Background color>: Integer or constant (optional)

Background color of circle. This color corresponds to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
a preset color of WLanguage,
Versions 22 and later
a Color variable.
New in version 22
a Color variable.
a Color variable. a Color variable.
If this parameter is not specified, the background color:
is Transparent if dBackground was not used beforehand,
corresponds to the color specified in the last call to dBackground.

<Line color>: Integer or constant (optional)

Color of circle line. This color corresponds to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
a preset color of WLanguage,
Versions 22 and later
a Color variable.
New in version 22
a Color variable.
a Color variable. a Color variable.
If this parameter is not specified, the line color:
corresponds to the color specified in the last call to dPen,
is identical to the background color if dPen was not used.

Remarks

Coordinates

The coordinates are specified in relation to the top left corner of the Image control (coordinates set to (0,0)).

Using the drawing functions

The drawing functions can be used according to 2 methods:

Method 1: Using dDrawing
- dStartDrawing must be called before any other drawing function. dStartDrawing is used to define the element (Image control or Image variable) onto which the drawing functions will be applied.
- When drawing on an Image control:
  - The drawing functions operate on a copy ("bitmap") of the image. You can use the drawing functions of Windows (via API or CallDLL32) but these functions must use the DC (Device Context) returned by dStartDrawing.
  - dEndDrawing and dStartDrawing must not be called in the same process.
    The drawing will not be displayed if dEndDrawing and dStartDrawing are called in the same process: it will be automatically erased.
Versions 24 and later
Method 2: indicating the drawing target directly in the syntax (via a parameter)
The <Image> parameter is used to specify directly the target of the drawing. dStartDrawing becomes useless.
New in version 24
Method 2: indicating the drawing target directly in the syntax (via a parameter)
The <Image> parameter is used to specify directly the target of the drawing. dStartDrawing becomes useless.
Method 2: indicating the drawing target directly in the syntax (via a parameter)
The <Image> parameter is used to specify directly the target of the drawing. dStartDrawing becomes useless.

Related Examples:

Unit examples (WINDEV): The drawing functions

[ + ] Using the main drawing functions of WINDEV to:
- Initialize an Image control for drawing
- Draw simple shapes
- Write a text into a drawing
- Change the color in a drawing

Component : wd240pnt.dll