<Image>.DrawPolyline (Function)

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<Image>.DrawPolyline (Function)

In french: <Image>.DessinePolyligne

Draws a line composed of several segments in an Image control.

Versions 25 and later

This function is now available for Android applications.

This function is now available in browser code.

New in version 25

This function is now available for Android applications.

This function is now available in browser code.

This function is now available for Android applications.

This function is now available in browser code.

The first coordinate indicates the starting point of the first segment, then each coordinate indicates the end of the previous segment and the beginning of the next segment.

Example

IMG_Drawing.Pen(LightBlue, 2, 4)
arrCoordinatesXY2 is array of 0 int = [2, 2, 140, 2, 150, 70, 0, 100, 200,100]
IMG_Drawing.DrawPolyline(arrCoordinatesXY2)

Syntax

Building a line point by point Hide the details

<Image control>.DrawPolyline(<NbPoint> , <X1> , <Y1> , <X2> , <Y2> [, <Xn> [, <Yn> [, <Line color>]]])

<Image control>: Control name

Name of the Image control to use.

<NbPoint>: Integer

Number of line segments. This parameter defines the number of <X>, <Y> pairs to specify in the function.

<X1>: Integer

X coordinate of the first segment of the line. These coordinates are expressed in pixels.

<Y1>: Integer

Y coordinate of the first segment of the line. These coordinates are expressed in pixels.

<X2>: Integer

X coordinate of the second segment of the line. These coordinates are expressed in pixels.

<Y2>: Integer

Y coordinate of the second segment of the line. These coordinates are expressed in pixels.

<Xn>: Optional integer

X coordinate of the N segment of the line. These coordinates are expressed in pixels.

<Yn>: Optional integer

Y coordinate of the N segment of the line. These coordinates are expressed in pixels.

<Line color>: Integer or constant (optional)

Line color. This color can correspond to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
a preset color of WLanguage.
If this parameter is not specified, the line color:
corresponds to the Color specified in the last call to the <Image>.Pen function,
is identical to the Color used for the Background if the <Image>.Pen function has not been used.

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

<Image control>.DrawPolyline(<Array of coordinates> [, <Line color>])

<Image control>: Control name

Name of the Image control to use.

<Array of coordinates>: Array of integers or array of points

WLanguage array of integers containing the coordinates of segments that make up the line. The even subscript represent the X coordinates while the odd subscripts represent the Y coordinates of points. These coordinates are expressed in pixels.

<Line color>: Integer or constant (optional)

Line color. This color can correspond to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
une preset color of WLanguage,
a Color variable.
If this parameter is not specified, the line color:
corresponds to the color specified in the last call to <Image>.Pen,
is identical to the Color used for the Background if the <Image>.Pen function has not been used.

Versions 26 and later

Construction of an row via an Variable type Polygon Hide the details

<Image control>.DrawPolyline(<Polygon> [, <Line color>])

<Image control>: Control name

Name of the Image control to use.

<Polygon>: Variable type Polygon

Name of the variable of type Polygon describing the different points of the Polygon.

<Line color>: Integer or constant (optional)

Line color. This color can correspond to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
une preset color of WLanguage,
une Variable de type Color.
If this parameter is not specified, the line color:
corresponds to the color specified in the last call to <Image>.Pen,
is identical to the Color used for the Background if the <Image>.Pen function has not been used.

New in version 26

Construction of an row via an Variable type Polygon Hide the details

<Image control>.DrawPolyline(<Polygon> [, <Line color>])

<Image control>: Control name

Name of the Image control to use.

<Polygon>: Variable type Polygon

Name of the variable of type Polygon describing the different points of the Polygon.

<Line color>: Integer or constant (optional)

Line color. This color can correspond to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
une preset color of WLanguage,
une Variable de type Color.
If this parameter is not specified, the line color:
corresponds to the color specified in the last call to <Image>.Pen,
is identical to the Color used for the Background if the <Image>.Pen function has not been used.

Construction of an row via an Variable type Polygon Hide the details

<Image control>.DrawPolyline(<Polygon> [, <Line color>])

<Image control>: Control name

Name of the Image control to use.

<Polygon>: Variable type Polygon

Name of the variable of type Polygon describing the different points of the Polygon.

<Line color>: Integer or constant (optional)

Line color. This color can correspond to:
an RGB color (returned by RGB),
an HSL color (returned by HSL),
une preset color of WLanguage,
une Variable de type Color.
If this parameter is not specified, the line color:
corresponds to the color specified in the last call to <Image>.Pen,
is identical to the Color used for the Background if the <Image>.Pen function has not been used.

Remarks

Coordinates

Coordinates are given with respect to the top left corner of the image (coordinates: (0.0)).

Drawing in Browser code

Some drawing functions are available in Browser code. The drawing functions in Browser code are based on the HTML 5 standard. More specifically, these functions are based on the "canvas" tag of HTML 5.

The drawing features in browser code are available for the recent browsers only (supporting the HTML 5 standard). To find out whether the drawing features are proposed by your browser, use DrawingAvailable.

Caution: To use the drawing functions with Internet Explorer 9, the project must include the reference to the DTD file. To do so, the HTML mode must be "HTML 4.01 Transitional + DTD". This option is available in the "Advanced" tab of the description window of project.
Reminder: To open the project description window, go to the "Project" pane, "Project" group and click "Description".

Special case: Drawing in the browser of an Android phone: The browser drawing functions are only available starting with version 3 of Android.

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

Business / UI classification: Neutral code

Component: wd260pnt.dll