This frame is sent by the server to tell the client what to draw on the canvas
{
"T" : "F",
"G" : [{<Geometry_0>},...,],where {<Geometry_0>} references one of the below types
String to be drawn on the canvas. <StringToDraw> serialized as follows:
{
"G" : "S",
"L" : {
"S" : "<Label->m_strText>",
"W" : <Label->m_iWrapSize>
},
"X" : <X>,
"Y" : <Y>,
"F" : <iFontSize>,
"C" : <iColor>,
}where:
"<Label->m_strText>" string to be drawn,
<Label->m_iWrapSize> from the Dasher code:
///If 0, Label is to be rendered on a single line.
/// Any other value, Label need only be renderable at that size, but should
/// be _wrapped_ to fit the screen width. (It is up to platforms to decide
/// whether to support DrawString/TextSize at any other size but this is
/// NOT required.)<X> and <Y> coordinates where the text should be drawn (0,0) being the top left corner,
<iFontSize> font size in points
<iColor> text color that should be drawn as in integer index to a color map.
Rectangle to be drawn on the canvas. <RectangleToDraw> serialized as follows:
{
"G" : "R",
"X1" : <X1>,
"Y1" : <Y1>,
"X2" : <X2>,
"Y2" : <Y2>,
"C" : <iColor>,
"O" : <iOutlineColor>, //assume 0 if not sent
"T" : <iThickness> //assume 0 if not sent
}where:
<X1> and <Y1> coordinates for the top left corner of the rectangle
<X2> and <Y2> coordinates for the bottom corner of the rectangle
<iColor> fill color as an integer index to a color map
The follwing are optional, assume no outline if not present in the frame:
<iOutlineColor> outline color as an integer index to a color map
<iThickness> outline thickness (integer)
Circle to be drawn on the canvas. {<CircleToDraw>} serialized as follows:
{
"G" : "C",
"X" : <iCX>,
"Y" : <iCY>,
"R" : <iR>,
"F" : <iFillColor>,
"L" : <iLineColor>, //assume no border if not sent
"W" : <iLineWidth> //assume no border if not sent
}where:
<iCX> and <iCY> circle center coordinates
<iR> circle radius (integer)
<iFillColor> fill color as an integer index to a color map
The follwing are optional, assume no outline if not present in the frame:
<iLineColor> outline color as an integer index to a color map
<iLineWidth> outline thickness (integer)
Polyline to be drawn on the canvas. <PolylineToDraw> serialized as follows:
{
"G" : "L",
"P" : [[<X_0>,<Y_0>],...,[<X_Number>,<Y_Number>]],
"W" : <iWidth>,
"C" : <iColor>
}[[<X_0>,<Y_0>],...,[<X_Number>,<Y_Number>]] array of arrays containing coordinates of to points to be connected
<iWidth> width of the line (integer)
<iColor> line color as in integer index to a color map.
Polygon to be drawn on the canvas. <PolygonToDraw> serialized as follows:
{
"G" : "P",
"P" : [[<X_0>,<Y_0>],...,[<X_Number>,<Y_Number>]],
"F" : <iFillColor>,
"O" : <iOutlineColor>, //assume 0 if not sent
"W" : <LineWidth> //assume 0 if not sent
}[[<X_0>,<Y_0>],...,[<X_Number>,<Y_Number>]] array of arrays containing coordinates of to be polygon's vertices
<iFillColor> fill color as an integer index to a color map
The follwing are optional, assume no outline if not present in the frame:
<iOutlineColor> outline color as an integer index to a color map
<LineWidth> outline thickness (integer)
This frame is sent by the server to request font size measurements by the client
{
"T" : "A",
"C" : ["<DisplayText_0>", ...]
"S" : [<font_size_0>, ...]
}["<DisplayText_0>", ...] array of strings containing the text to be measured
[<font_size_0>, ...] array of integer font sizes in pt to be measured
This frame is sent to the server to answer the alphabet request JSON above
{
"T" : "S",
"C" : [
{
"D" : "<DisplayText_0>",
"W" : [<width_for_font_size_0>, ...]
},
...
],
"H" : [<line_height_for_font_size_0>,...]
}"C" : [
{
"D" : "<DisplayText_0>",
"W" : [<width_for_font_size_0>, ...]
},
...
],Array of texts and their corresponding widths. Texts are strings and widths are an integer array, value in pixels.
"H" : [<line_height_for_font_size_0>,...]array of heights in pixels corresponding to the font size.
Sends the text buffer contents to the client whenever the buffer is changed.
{
"T" : "B",
"B" : <NewBuffer>
}<NewBuffer> String containing the buffer
JSON sent by the client to tell the server the new screen width and height
{
"T": "R",
"W": <iWidth>,
"H": <iHeight>
}<iWidth> and <iHeight> Updated width and height of the screen in pixels (unsigned integers)
Sent by the client to update the server on the mouse position
{
"T": "C",
"X": <iX>,
"Y": <iY>
}<iX> and <iY> x and y position of the mouse (integer)
Sent by the client to notify the server of a mouse click
{
"T": "M",
"D": <bMouseDown>
}<bMouseDown> boolean, True if mouse button was pressed, False if released.
Sent by the client to set options in Dasher
{
"T": "P",
"N": "<Parameter_Name>"
"V": <Parameter_Value>
}<Parameter_Name> string, defines which parameter is set (see DasherCore's Parameters.h for possible values)
<Parameter_Value> either String/Bool/Long, defines the value of this parameter
Sent automatically by the server to show which parameters are available
{
"T": "P",
"Bool" : [
{"Name" : <Param Name>, "Default" : <Param Default>, "Description" : <Param Description>, "Value" : <Current Param Value>},
...
],
"String" : [
{"Name" : <Param Name>, "Default" : <Param Default>, "Description" : <Param Description>, "Value" : <Current Param Value>},
...
],
"Long" : [
{"Name" : <Param Name>, "Default" : <Param Default>, "Description" : <Param Description>, "Value" : <Current Param Value>},
...
]
}