Stategy control panels

Strategy parameters are normally set up with the sliders or simply by editing the script. For executable strategies that do not come with source code, or for complex strategies with multiple parameters and options, a strategy specific control panel can be created by script or from a spreadsheet template. The panel is a rectangular grid of multi-purpose cells. Every cell can display text, numbers, and a color, and can serve as a numeric or text input field or as a push, toggle, radio, or spin button. With this concept, even complex control functions for commercial strategies can be realized in a simple way. Such a control panel does not look particularly pretty, but it's functional:


The following functions can be used for defining and handling a control panel (Zorro S or executable strategies only):

panel (int rows, int columns, int color, int size)

Opens an empty control panel with the given number of rows and columns, background color, and horizontal cell size in pixels. If a control panel was already open, it is replaced by the new one. The panel is opened next to the Zorro window, and can be freely moved by dragging it with the mouse. Use size = 0 for removing the panel.

panel (string filename, int color, int size)

Opens a control panel with the structure and content from a .csv spreadsheet file. Every cell of the panel is set up from the corresponding spreadsheet cell. The cells in the file are separated with  ;  or  ,  delimiters (delimiters must not appear in cell content). Every row must end with a new line character. The following characters in the cell content have a special meaning:  !...  - cell is a button;  #...  - cell can be edited;  @  - merge the cell with the next not-empty cell to the left. The default colors are grey for text cells, red for numbers, yellow for editable cells, and blue for buttons; they can be changed with the ColorPanel variables. The panel above is generated from the following file:
Leverage,@,400,,, ,Algo 1,Algo 1,Algo 3
Win Ratio,@,30%,,Asset,@,#EUR/CHF,#EUR/USD,#USD/GBP
Lot size,@,100,,Max Allowed Loss %,@,#5,#20,#25
Commission,@,1.2,,First Step Volume+,@,#1,#5,#20
,,,,Volume Growth,@,#2,#2,#2
Long Trades,@,34,,Volume Max,@,#10,#20,#50
Average Profit,@,4.01,,Max Stop Distance,@,,,#300
Short Trades,@,44,,,,,,
Average Profit,@,2.34,,,,,,
Quotes,@,3,,!Close All,,@,,
Average Spread,@,10.2,,!Open New,,@,,
Average slippage,@,1.4,,!Hide Candles,,@,,
Average Trade Cost,@,15.34,,!Show Statistics,,@,,

panelSet (int row, int col, string text, int color, int style, int type)

Set properties or update content of an individual cell.
row - row number starting with 0, or -1 for the [Result] button.
col - column number starting with 0.
text - content to appear in the cell or on the button, or 0 for not changing the content. Numbers can be converted to text with strf.
color - background color of the cell, or 0 for not changing the color.
style - 1 normal cell, 2 red highlighted text, 3 greyed-out text, 4 right-aligned, 8 left-aligned, 12 centered, 0 for not changing the style.
type - 1 normal cell, 2 editable cell, 4 button, 0 for not changing the type.

panelGet (int row, int col): string

Returns a temporary string with the current content of the cell. Numbers can be converted from the returned string with sscanf, atof, or atoi.

panelSave (string filename)

Saves the panel content in .csv format to the given file.

panelLoad (string filename)

Loads the saved panel content in .csv format from the given file. Only editable or button cells are affected.

click(int row, int col)

User-supplied function that is triggered by mouse click either on a button cell with the given row and col numbers, or on the [Result] button with row at -1. Dependent on the desired behavior of the button, the function can then change the cell color or content through panelSet.


Example: (see also Source\Download.c)

function click(int row,int col)
  if(!is(RUNNING)) return;
string Text = panelGet(row,col);
if(Text == "Buy") // toggle button between "Buy" and "Sell"
else if(Text == "Sell")
else if(Text == "Close All") // push button
closeAllTrades(); else if(Text == "Cancel") // back to last saved state panelLoad("Data\\mypanel.csv"); }

See also:

sliders, user supplied functions


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