Nees math help - How to dynamically draw time labels on Clock?

[E1M1 4]

I am trying tom make clock control. How do I dynamically put all 12 hour label to right place on clock? I don't want to use _GDIPlus_GraphicsDrawString ($hGraphic, "Hello world", 140, 110) with fixed coordinates, but I can't think how to make function that would place these dynamically. 3'o clock should be placed at 0 degrees, 12 o'clock should be at 90 degrees 9 => 180 deg and 6 => 270 deg.

How can I write function that would take $x,$y,$r1,$r2,$deg as args and then calculate x,y so that when I put label on x,y it would be on right place at clock?

#include <GuiConstantsEx.au3>
#include <GDIPlus.au3>

Opt('MustDeclareVars', 1)

_Main()

Func _Main()
    Local $hGUI, $hGraphic

    ; Create GUI
    $hGUI = GUICreate("GDI+", 400, 300)
    GUISetState()

    ; Draw an ellipse
    _GDIPlus_Startup ()
    GUiCtrlClockCreate($hGUI,30,30,200,200)


    ; Loop until user exits
    Do
    Until GUIGetMsg() = $GUI_EVENT_CLOSE

    ; Clean up resources
    _GDIPlus_GraphicsDispose ($hGraphic)
    _GDIPlus_Shutdown ()

EndFunc   ;==>_Main

Func GUICtrlClockCreate($hwnd,$x,$y,$r1,$r2,$hGraphic = False)
    If $hGraphic = false Then  $hGraphic = _GDIPlus_GraphicsCreateFromHWND ($hwnd)
    _GDIPlus_GraphicsDrawEllipse ($hGraphic, $x,$y,$r1,$r2)
    _GDIPlus_GraphicsDrawEllipse ($hGraphic, $x + ($r1/2 -1),$y + ($r2/2 -1),3,3)
    ;_GDIPlus_GraphicsDrawString ($hGraphic, "Hello world", 140, 110)
EndFunc

[UEZ 1,068]

You mean something like this:

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#include <GuiConstantsEx.au3>
#include <GDIPlus.au3>

Opt('MustDeclareVars', 1)

_Main()

Func _Main()
    Local $hGUI, $hGraphic

    ; Create GUI
    $hGUI = GUICreate("GDI+", 400, 300)
    GUISetState()

    ; Draw an ellipse
    _GDIPlus_Startup ()
    GUiCtrlClockCreate($hGUI,30,30,200,200)


    ; Loop until user exits
    Do
    Until GUIGetMsg() = $GUI_EVENT_CLOSE

    ; Clean up resources
    _GDIPlus_GraphicsDispose ($hGraphic)
    _GDIPlus_Shutdown ()

EndFunc   ;==>_Main

Func GUICtrlClockCreate($hwnd,$x,$y,$r1,$r2,$hGraphic = False)
    Local $i, $cR3 = 90, $fs = 8, $deg = ACos(-1) / 180
    If $hGraphic = false Then  $hGraphic = _GDIPlus_GraphicsCreateFromHWND ($hwnd)
    _GDIPlus_GraphicsDrawEllipse ($hGraphic, $x,$y,$r1,$r2)
    _GDIPlus_GraphicsDrawEllipse ($hGraphic, $x + ($r1/2 -1),$y + ($r2/2 -1),3,3)
    For $i = 1 To 12
        _GDIPlus_GraphicsDrawString($hGraphic, $i, -$fs / 2 + $x + ($r1/2 -1) + Cos(-45 + ($i - 1) * 29.7 * $deg) * $cR3, -$fs * 0.75 + $y + ($r2/2 -1) + Sin(-45 + ($i - 1) * 29.7 * $deg) * $cR3, "Arial", $fs)
    Next
    ;_GDIPlus_GraphicsDrawString ($hGraphic, "Hello world", 140, 110)
EndFunc

I wrote last year a Maybe it is useful for you!

Br,

UEZ

Edited April 23, 2011 by UEZ

[E1M1 4]

Thanks a lot. I am looking for something like your clock but how to make clock pointers user dragable?

Lets say that user click on X,Y on client area. How to detect if that x,y is somewhere on clock pointer?

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#include <GuiConstantsEx.au3>
#include <GDIPlus.au3>

Opt('MustDeclareVars', 1)

_Main()

Func _Main()
    Local $hGUI, $hGraphic

    ; Create GUI
    $hGUI = GUICreate("GDI+", 400, 300)
    GUISetState()

    ; Draw an ellipse
    _GDIPlus_Startup ()
    GUiCtrlClockCreate($hGUI,30,30,200,200)


    ; Loop until user exits
    Do
    Until GUIGetMsg() = $GUI_EVENT_CLOSE

    ; Clean up resources
    _GDIPlus_GraphicsDispose ($hGraphic)
    _GDIPlus_Shutdown ()

EndFunc   ;==>_Main

Func GUICtrlClockCreate($hwnd,$x,$y,$r1,$r2,$hGraphic = False)
    Local $i, $cR3 = 90, $fs = 8, $deg = ACos(-1) / 180
    If $hGraphic = false Then  $hGraphic = _GDIPlus_GraphicsCreateFromHWND ($hwnd)
    _GDIPlus_GraphicsDrawEllipse ($hGraphic, $x,$y,$r1,$r2)
    _GDIPlus_GraphicsDrawEllipse ($hGraphic, $x + ($r1/2 -1),$y + ($r2/2 -1),3,3)
    For $i = 1 To 12
        _GDIPlus_GraphicsDrawString($hGraphic, $i, -$fs / 2 + $x + ($r1/2 -1) + Cos(-45 + ($i - 1) * 29.7 * $deg) * $cR3, -$fs * 0.75 + $y + ($r2/2 -1) + Sin(-45 + ($i - 1) * 29.7 * $deg) * $cR3, "Arial", $fs)
    Next
    $i = 1
    _GDIPlus_GraphicsDrawLine($hGraphic, $x + ($r1/2 -1), $y + ($r2/2 -1), -$fs / 2 + $x + ($r1/2 -1) + Cos(-45 + ($i - 1) * 29.7 * $deg) * $cR3, -$fs * 0.75 + $y + ($r2/2 -1) + Sin(-45 + ($i - 1) * 29.7 * $deg) * $cR3)
        $i = 3
    _GDIPlus_GraphicsDrawLine($hGraphic, $x + ($r1/2 -1), $y + ($r2/2 -1), -$fs / 2 + $x + ($r1/2 -1) + Cos(-45 + ($i - 1) * 29.7 * $deg) * $cR3, -$fs * 0.75 + $y + ($r2/2 -1) + Sin(-45 + ($i - 1) * 29.7 * $deg) * $cR3)
    ;_GDIPlus_GraphicsDrawString ($hGraphic, "Hello world", 140, 110)
EndFunc

Edited March 2, 2011 by E1M1

[Malkey 162]

.... how to make clock pointers user dragable?

....

Dragable clock hands reminded me of the example

Don't forget to right click either clock's center black dot.

[E1M1 4]

nice example