PC SOFT

ONLINE HELP
 WINDEVWEBDEV AND WINDEV MOBILE

Home | Sign in | English EN
This content has been translated automatically. Click here to view the French version.
  • Coordinates
  • Drawing with opacity or anti-aliasing
  • Using the drawing functions
WINDEV
WindowsLinuxUniversal Windows 10 AppJavaReports and QueriesUser code (UMC)
WEBDEV
WindowsLinuxPHPWEBDEV - Browser code
WINDEV Mobile
AndroidAndroid Widget iPhone/iPadIOS WidgetApple WatchMac CatalystUniversal Windows 10 App
Others
Stored procedures
Draws a polygon:
  • in an Image control,
  • in an Image variable.
  • Versions 25 and later
    WINDEV in a WDPic variable (on the background layer),
    New in version 25
    WINDEV in a WDPic variable (on the background layer),
    WINDEV in a WDPic variable (on the background layer),
  • Versions 25 and later
    WINDEV in a picLayer variable.
    New in version 25
    WINDEV in a picLayer variable.
    WINDEV in a picLayer variable.
Versions 15 and later
Linux This function is now available for WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. For more details, see The drawings.
New in version 15
Linux This function is now available for WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. For more details, see The drawings.
Linux This function is now available for WEBDEV sites in Linux.
Linux Caution: A specific configuration is required to use this function in Linux. For more details, see The drawings.
Versions 18 and later
Universal Windows 10 App This function is now available in Windows Store apps mode.
New in version 18
Universal Windows 10 App This function is now available in Windows Store apps mode.
Universal Windows 10 App This function is now available in Windows Store apps mode.
Versions 21 and later
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
New in version 21
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Universal Windows 10 App This function is now available in Universal Windows 10 App mode.
Versions 24 and later
Java The syntax that manages the Point and the Color types is now available for Java applications.
New in version 24
Java The syntax that manages the Point and the Color types is now available for Java applications.
Java The syntax that manages the Point and the Color types is now available for Java applications.
// Initialise le dessin dans un champ Image
dStartDrawing(IMG_Dessin)
// Dessin d'un polygone à 4 côtés dont le
// fond est jaune clair et le bord bleu clair
dPolygon(4, 10, 20, 20, 50, 40, 60, 50, 10, LightYellow, LightBlue)
Versions 24 and later
WINDEVUniversal Windows 10 AppUser code (UMC)
// Dessin d'un polygone à 4 côtés dont le
// fond est jaune clair et le bord bleu clair
dPolygon(IMG_Dessin, 4, 10, 20, 20, 50, 40, 60, 50, 10, LightYellow, LightBlue)
New in version 24
WINDEVUniversal Windows 10 AppUser code (UMC)
// Dessin d'un polygone à 4 côtés dont le
// fond est jaune clair et le bord bleu clair
dPolygon(IMG_Dessin, 4, 10, 20, 20, 50, 40, 60, 50, 10, LightYellow, LightBlue)
WINDEVUniversal Windows 10 AppUser code (UMC)
// Dessin d'un polygone à 4 côtés dont le
// fond est jaune clair et le bord bleu clair
dPolygon(IMG_Dessin, 4, 10, 20, 20, 50, 40, 60, 50, 10, LightYellow, LightBlue)
WINDEVWindowsUser code (UMC)
// Dessin d'un polygone à partir d'un tableau de coordonnées de points
tabCoordonnéesXY is array of 0 by 2 int = [[2, 3], [14, 100], [10,70], [50, 80]]
dPolygon(tabCoordonnéesXY)
tabCoordonnéesXY2 is array of 0 int = [2, 2, 140, 2, 150, 70, 0, 100, 200, 100]
dPolygon(tabCoordonnéesXY2)
tabCoordonnéesXYC is array of 36 by 2 int
Rayon is int = 50
FOR I = 1 TO 36
// x
tabCoordonnéesXYC[I][1] = 80 + Cos(I*10) * Rayon
// y
tabCoordonnéesXYC[I][2] = 60 + Sin(I*10) * Rayon
END
dPolygon(tabCoordonnéesXYC, LightGray, YellowToolhelp)
Syntax

Building a polygon point by point Hide the details

dPolygon([<Image>, ] <Number of sides> , <X1> , <Y1> , <X2> , <Y2> [, <X3> , <Y3> [... [, <Xn> , <Yn>]]] [, <Background color> [, <Side color>]])
<Image>: Optional control name or optional Image, WDPic or picLayer variable
Versions 24 and later
WindowsLinuxUniversal Windows 10 AppJavaUser code (UMC) Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
  • Versions 25 and later
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    New in version 25
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
  • Versions 25 and later
    WINDEV the name of a variable of type picLayer.
    New in version 25
    WINDEV the name of a variable of type picLayer.
    WINDEV the name of a variable of type picLayer.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
New in version 24
WindowsLinuxUniversal Windows 10 AppJavaUser code (UMC) Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
  • Versions 25 and later
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    New in version 25
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
  • Versions 25 and later
    WINDEV the name of a variable of type picLayer.
    New in version 25
    WINDEV the name of a variable of type picLayer.
    WINDEV the name of a variable of type picLayer.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
WindowsLinuxUniversal Windows 10 AppJavaUser code (UMC) Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
  • Versions 25 and later
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    New in version 25
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
  • Versions 25 and later
    WINDEV the name of a variable of type picLayer.
    New in version 25
    WINDEV the name of a variable of type picLayer.
    WINDEV the name of a variable of type picLayer.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
<Number of sides>: entier
Number of sides in the polygon (up to 23 sides). This parameter defines the number of <X>, <Y> pairs to specify in the function.
<X1>: entier
X-coordinate of first point of the polygon. These coordinates are expressed in pixels.
<Y1>: entier
Y-coordinate of first point of the polygon. These coordinates are expressed in pixels.
<X2>: entier
X-coordinate of second point of the polygon. These coordinates are expressed in pixels.
<Y2>: entier
Y-coordinate of second point of the polygon. These coordinates are expressed in pixels.
<X3>: entier
X-coordinate of 3rd point of the polygon. These coordinates are expressed in pixels.
<Y3>: entier
Y-coordinate of 3rd point of the polygon. These coordinates are expressed in pixels.
<Xn>: Optional integer
X coordinate of nth point of the polygon. These coordinates are expressed in pixels.
<Yn>: Optional integer
Y coordinate of nth point of the polygon. These coordinates are expressed in pixels.
<Background color>: Integer or constant (optional)
Polygon background color. This color can correspond to:
If this parameter is not specified, the background color:
  • is Transparent if function dBackground has not been used before,
  • corresponds to the Color specified in the last call to the dBackground function.
<Side color>: Integer or constant (optional)
Color of polygon sides. This color can correspond to:
If this parameter is not specified, the line color:
  • corresponds to the Color specified in the last call to the dPen function,
  • is identical to the Color used for the Background if the dPen function was not used.

Building a polygon via an array of X and Y-coordinates Hide the details

dPolygon([<Image>, ] <Array of coordinates> [, <Background color> [, <Side color>]])
<Image>: Optional control name or optional Image, WDPic or picLayer variable
Versions 24 and later
WindowsLinuxUniversal Windows 10 AppJavaUser code (UMC) Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
  • Versions 25 and later
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    New in version 25
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
  • Versions 25 and later
    WINDEV the name of a variable of type picLayer.
    New in version 25
    WINDEV the name of a variable of type picLayer.
    WINDEV the name of a variable of type picLayer.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
New in version 24
WindowsLinuxUniversal Windows 10 AppJavaUser code (UMC) Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
  • Versions 25 and later
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    New in version 25
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
  • Versions 25 and later
    WINDEV the name of a variable of type picLayer.
    New in version 25
    WINDEV the name of a variable of type picLayer.
    WINDEV the name of a variable of type picLayer.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
WindowsLinuxUniversal Windows 10 AppJavaUser code (UMC) Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
  • Versions 25 and later
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    New in version 25
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
  • Versions 25 and later
    WINDEV the name of a variable of type picLayer.
    New in version 25
    WINDEV the name of a variable of type picLayer.
    WINDEV the name of a variable of type picLayer.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
<Array of coordinates>: Array of integers or array of points
  • WLanguage array of integers containing the coordinates of polygon points. The even subscript represent the X-coordinates while the odd subscripts represent the Y-coordinates of points. These coordinates are expressed in pixels.
  • WINDEVUniversal Windows 10 AppJava WLanguage array of Point variables containing the coordinates of polygon points. These coordinates are expressed in pixels.
<Background color>: Integer or constant (optional)
Polygon background color. This color can correspond to:If this parameter is not specified, the background color:
  • is Transparent if the dBackground function has not been used before,
  • corresponds to the Color specified in the last call to the dBackground function.
<Side color>: Integer or constant (optional)
Color of polygon sides. This color can correspond to:If this parameter is not specified, the line color:
  • corresponds to the color specified in the last call to dPen,
  • is identical to the Color used for the Background if the dPen function was not used.
Versions 26 and later
WindowsLinuxUser code (UMC)

Construction of a polygon from an Variable of the Polygon type Hide the details

dPolygon([<Image>, ] <Polygon> [, <Background color> [, <Side color>]])
<Image>: Optional control name or optional Image, WDPic or picLayer variable
WindowsLinuxUser code (UMC) Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
  • Versions 25 and later
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    New in version 25
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
  • Versions 25 and later
    WINDEV the name of a variable of type picLayer.
    New in version 25
    WINDEV the name of a variable of type picLayer.
    WINDEV the name of a variable of type picLayer.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
<Polygon>: Variable type Polygon
Name of the variable of type Polygon describing the different points of the Polygon.
<Background color>: Integer or constant (optional)
Polygon background color. This color can correspond to:If this parameter is not specified, the background color:
  • is Transparent if the dBackground function has not been used before,
  • corresponds to the Color specified in the last call to the dBackground function.
<Side color>: Integer or constant (optional)
Color of polygon sides. This color can correspond to:If this parameter is not specified, the line color:
  • corresponds to the color specified in the last call to dPen,
  • is identical to the Color used for the Background if the dPen function was not used.
New in version 26
WindowsLinuxUser code (UMC)

Construction of a polygon from an Variable of the Polygon type Hide the details

dPolygon([<Image>, ] <Polygon> [, <Background color> [, <Side color>]])
<Image>: Optional control name or optional Image, WDPic or picLayer variable
WindowsLinuxUser code (UMC) Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
  • Versions 25 and later
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    New in version 25
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
  • Versions 25 and later
    WINDEV the name of a variable of type picLayer.
    New in version 25
    WINDEV the name of a variable of type picLayer.
    WINDEV the name of a variable of type picLayer.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
<Polygon>: Variable type Polygon
Name of the variable of type Polygon describing the different points of the Polygon.
<Background color>: Integer or constant (optional)
Polygon background color. This color can correspond to:If this parameter is not specified, the background color:
  • is Transparent if the dBackground function has not been used before,
  • corresponds to the Color specified in the last call to the dBackground function.
<Side color>: Integer or constant (optional)
Color of polygon sides. This color can correspond to:If this parameter is not specified, the line color:
  • corresponds to the color specified in the last call to dPen,
  • is identical to the Color used for the Background if the dPen function was not used.
WindowsLinuxUser code (UMC)

Construction of a polygon from an Variable of the Polygon type Hide the details

dPolygon([<Image>, ] <Polygon> [, <Background color> [, <Side color>]])
<Image>: Optional control name or optional Image, WDPic or picLayer variable
WindowsLinuxUser code (UMC) Image to use. This image can correspond to:
  • the name of an Image control.
  • the name of a variable of type Image.
  • Versions 25 and later
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    New in version 25
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
    WINDEV the name of a variable of type WDPic. Only the background layer will be handled.
  • Versions 25 and later
    WINDEV the name of a variable of type picLayer.
    New in version 25
    WINDEV the name of a variable of type picLayer.
    WINDEV the name of a variable of type picLayer.
If this parameter is not specified, it is necessary to define the drawing destination with dStartDrawing.
<Polygon>: Variable type Polygon
Name of the variable of type Polygon describing the different points of the Polygon.
<Background color>: Integer or constant (optional)
Polygon background color. This color can correspond to:If this parameter is not specified, the background color:
  • is Transparent if the dBackground function has not been used before,
  • corresponds to the Color specified in the last call to the dBackground function.
<Side color>: Integer or constant (optional)
Color of polygon sides. This color can correspond to:If this parameter is not specified, the line color:
  • corresponds to the color specified in the last call to dPen,
  • is identical to the Color used for the Background if the dPen function was not used.
Remarks

Coordinates

Drawing a polygon:
dPolygon(5, 80, 10, 10, 150, 100, 200, 160, 80, 140, 40)
Drawing a polygon
Coordinates are given with respect to the top left corner of the image (coordinates: (0.0)).
Important: There is no need to close the polygon (the coordinates of last point do not have to be equal to the coordinates of first point). The polygon is automatically "closed".
Limits: a polygon can contain up to 100 000 points in WINDEV, WEBDEV and Java, and up to 1000 points in Windows CE.
WINDEVWindowsJavaUser code (UMC)

Drawing with opacity or anti-aliasing

When drawing with opacity (dStartDrawing with the dWithOpacity constant) or with anti-aliasing (dChangeMode with the drawAntiAliasing constant), the border is drawn above the inside of the polygon: therefore, the line is partly combined with the inside of the polygon. If the line is very thick, it will be displayed in two colors.

Using the drawing functions

The drawing functions can be used according to 2 methods:
  • Method 1: Using dStartDrawing
    • dStartDrawing must be called before any other drawing function. dStartDrawing is used to define the element (Image control or variable) to 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
    WindowsLinuxUniversal Windows 10 AppJavaUser code (UMC) 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. The dStartDrawing function becomes unnecessary. This function must be deleted.
    Versions 25 and later
    Java This syntax is now available.
    New in version 25
    Java This syntax is now available.
    Java This syntax is now available.
    New in version 24
    WindowsLinuxUniversal Windows 10 AppJavaUser code (UMC) 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. The dStartDrawing function becomes unnecessary. This function must be deleted.
    Versions 25 and later
    Java This syntax is now available.
    New in version 25
    Java This syntax is now available.
    Java This syntax is now available.
    WindowsLinuxUniversal Windows 10 AppJavaUser code (UMC) 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. The dStartDrawing function becomes unnecessary. This function must be deleted.
    Versions 25 and later
    Java This syntax is now available.
    New in version 25
    Java This syntax is now available.
    Java This syntax is now available.
Related Examples:
The drawing functions 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
Business / UI classification: Neutral code
Component: wd270pnt.dll
Minimum version required
  • Version 9
This page is also available for…
Comments
Click [Add] to post a comment