I recently had a use for a pie chart in ahk, and had trouble finding any solution for this.. So I created a pie chart function, and thought someone else may be able to use it.
Screenshot:
function:PieChart(hwnd, x_coord, y_coord, diameter,segments,bordersize, showpercentages = 0)
The parameters for the function are:
hwnd of the window you wish to draw pie chart on
x coord of the pie chart (relative to the window)
y coord of the pie chart (relative to the window)
diameter of the pie chart
segments is a csv list of name|size of segments, these arent percentages, but they can be you so choose. (the function will calc the percentages otherwise)
bordersize - the thickness of the border around the ellipse, as well as between the segments, 0 = no border
showpercentages - display the percentage for each pie segment (0 for no, 1 for yes)
Example Usage:
Code:
gui, show, x300 y100 h800 w1000, piecharts
whwnd := WinExist("A")
data = Internet Explorer|20, Firefox|30, Chrome|50, Opera|20, Other|10
PieChart(whwnd,40,20,300,data,3,1)
todo - create key for chart (if anyone has a use for this)
- fix bugs that im sure this will have
edit 1 - cleaned up the % display, moved to inside pie
Function:Code:
PieChart(hwndWin, xpos, ypos, size,segments,bordersize, showpercentages = 0)
{
;define colors
color_1 := 0x008000 ;green
color_2 := 0x0000FF ;red
color_3 := 0xFF0000 ;blue
color_4 := 0x00FFFF ;yellow
color_5 := 0x00FF00 ;lime
color_6 := 0x808000 ;teal
color_7 := 0xFFFF00 ;aqua
color_8 := 0xFF00FF ;fuchsia
color_9 := 0x800080 ;purple
color_10:= 0xFFFFFF ;white
;get a dc for the window
hdcWin := DllCall("GetDC", "UInt", hwndWin)
Pen := DllCall("CreatePen", int, 0, int, bordersize, int, 0x000000)
DllCall("SelectObject", uint, hdcWin, uint, pen)
;draw ellipse to the window
DllCall("Ellipse", uint, hdcWin, int, xpos, int, ypos, int, xpos + size, int, ypos + size)
;set variables
radius := size / 2
tradius := size / 2 * .8 ;test radius
2pi := 2*3.1415926
center_x := xpos + size / 2
center_y := ypos + size / 2
dangle := 0 ;set the initial angle to 0 degrees
rangle := dangle * .01745329252 ;convert degrees to radians
prev_x := center_x + radius * cos(rangle-2pi/4) ;find the x coord of the initial angle
prev_y := center_y + radius * sin(rangle-2pi/4) ;find the y coord of the initial angle
;count the number of segments
Loop, Parse, segments, `,
{
Segment_Count := A_Index
Loop, Parse, A_Loopfield, |
{
If (A_Index & 1)
continue
Piece_Count += A_Loopfield
}
}
;get the size of each piece
piece_size_deg := 1 / Piece_Count * 360
;draw pie slice
loop, parse, segments, `,
{
bcolor := A_Index
if A_Index > 10 ; only storing 10 diffent colors, if there is more pie pieces
bcolor := A_Index - 10 ; than this, then start reusing the colors..
bcolor := color_%bcolor%
Loop, parse, A_Loopfield, |
{
if (A_Index & 1)
continue
else
{
brush := DllCall("CreateSolidBrush", int, bcolor)
DllCall("SelectObject", uint, hdcWin, uint, brush)
if !(bordersize)
{
Pen := DllCall("CreatePen", int, 0, int, 1, int, bcolor)
DllCall("SelectObject", uint, hdcWin, uint, pen)
}
dangle += piece_size_deg * A_Loopfield
rangle := dangle * .01745329252
next_x := center_x + radius * cos(rangle-2pi/4)
next_y := center_y + radius * sin(rangle-2pi/4)
DllCall("Pie", uint, hdcWin, int, xpos, int, ypos, int, xpos + size, int, ypos + size, int, next_x, int, next_y, int, prev_x, int, prev_y)
;show percentages if that parameter is set.
If (showpercentages)
{
segment_percent := Round((A_LoopField / piece_count) * 100,1) "%"
StringLen,segment_percentL, segment_percent
tangle := dangle - (piece_size_deg * A_LoopField) /2
rangle := tangle * .01745329252
text_x := center_x + tradius * cos(rangle-2pi/4)
text_y := center_y + tradius * sin(rangle-2pi/4)
DllCall("SetBkColor", "Int", hdcWin, "Int", bcolor)
DllCall("SetTextAlign", uint, hdcWin, int, 6)
DllCall("TextOut", uint, hdcwin, int, text_x, int, text_y, uint, &segment_percent, int, segment_percentL)
}
prev_x := next_x
prev_y := next_y
DllCall("DeleteObject", uint, brush)
if !(bordersize)
DllCall("DeleteObject", uint, pen)
}
}
}
DllCall("DeleteObject", uint, pen)
DllCall("ReleaseDC", uint, hdcWin)
}
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