Jump to content
tcurran

Pixel-accurate string width and height

Recommended Posts

Here are two functions to provide pixel-accurate height and width dimensions for a given string.

The more commonly-used _GDIPlus_GraphicsMeasureString built-in UDF is problematic because it returns the width padded by roughly one en-space (for reasons related to the various ways Windows produces anti-aliased fonts).

These are AutoIt translations of Pierre Arnaud's C# functions, described in his CodeProject article "Bypass Graphics.MeasureString limitations"

The first is an all-purpose version that takes a window handle, string, font family, font size (in points), style, and (optionally) width of the layout column (in pixels) as parameters.

The second, more efficient version is intended for applications where GDI+ fonts are already in use, and takes handles to the existing graphics context, string, font, layout and format as parameters.

Both functions return a two-row array with the exact width [0] and height [1] of the string (in pixels).

EDIT: (Note that some of the same anti-aliasing measurement issues still apply. I did my best to work around them, but the output of the function may still be off by a pixel or two. Buyer beware.)

#include <GDIPlus.au3>
#include <GUIConstantsEx.au3>

; #FUNCTION# ====================================================================================================================
; Name ..........: _StringInPixels
; Description ...: Returns a pixel-accurate height and width for a given string using a given font, style and size.
; Syntax ........: _StringInPixels($hGUI, $sString, $sFontFamily, $fSize, $iStyle[, $iColWidth = 0])
; Parameters ....: $hGUI                - Handle to the window.
;                  $sString             - The string to be measured.
;                  $sFontFamily         - Full name of the font to use.
;                  $fSize               - Font size in points (half-point increments).
;                  $iStyle              - Combination of 0-normal, 1-bold, 2-italic, 4-underline, 8-strikethrough
;                  $iColWidth           - [optional] If word-wrap is desired, column width in pixels
; Return values .: 2-row array. [0] is width in pixels; [1] is height in pixels.
; Author ........: Tim Curran; adapted from Pierre Arnaud's C# function
; Modified ......:
; Remarks .......: This version is longer and less efficient but works for all purposes.
; Related .......: <https://www.codeproject.com/Articles/2118/Bypass-Graphics-MeasureString-limitations>
; Link ..........:
; Example .......: Example-StringInPixels.au3
; ===============================================================================================================================
#include <GDIPlus.au3>
#include <GUIConstantsEx.au3>

Func _StringInPixels($hGUI, $sString, $sFontFamily, $fSize, $iStyle, $iColWidth = 0)
    _GDIPlus_Startup()
    Local $hGraphic = _GDIPlus_GraphicsCreateFromHWND($hGUI) ;Create a graphics object from a window handle

    Local $aRanges[2][2] = [[1]]
    $aRanges[1][0] = 0 ;Measure first char (0-based)
    $aRanges[1][1] = StringLen($sString) ;Region = String length

    Local $hFormat = _GDIPlus_StringFormatCreate()
    Local $hFamily = _GDIPlus_FontFamilyCreate($sFontFamily)
    Local $hFont = _GDIPlus_FontCreate($hFamily, $fSize, $iStyle)

    _GDIPlus_GraphicsSetTextRenderingHint($hGraphic, $GDIP_TEXTRENDERINGHINT_ANTIALIASGRIDFIT)
    _GDIPlus_StringFormatSetMeasurableCharacterRanges($hFormat, $aRanges) ;Set ranges

    Local $aWinClient = WinGetClientSize($hGUI)
    If $iColWidth = 0 Then $iColWidth = $aWinClient[0]
    Local $tLayout = _GDIPlus_RectFCreate(10, 10, $iColWidth, $aWinClient[1])
    Local $aRegions = _GDIPlus_GraphicsMeasureCharacterRanges($hGraphic, $sString, $hFont, $tLayout, $hFormat) ;get array of regions
    Local $aBounds = _GDIPlus_RegionGetBounds($aRegions[1], $hGraphic)
    Local $aWidthHeight[2] = [$aBounds[2], $aBounds[3]]

    ; Clean up resources
    _GDIPlus_FontDispose($hFont)
    _GDIPlus_RegionDispose($aRegions[1])
    _GDIPlus_FontFamilyDispose($hFamily)
    _GDIPlus_StringFormatDispose($hFormat)
    _GDIPlus_GraphicsDispose($hGraphic)
    _GDIPlus_Shutdown()

    Return $aWidthHeight
EndFunc   ;==>_StringInPixels


; #FUNCTION# ====================================================================================================================
; Name ..........: _StringInPixels_gdip
; Description ...: Returns a pixel-accurate height and width for a given string using a GDI+ font, layout and format
; Syntax ........: _StringInPixels_gdip($hGraphic, $sString, $hFont, $tLayout, $hFormat)
; Parameters ....: $hGraphic            - Handle to a GDI+ graphics object.
;                  $sString             - The string to be measured.
;                  $hFont               - Handle to a GDI+ font.
;                  $tLayout             - A $tagGDIPRECTF structure that bounds the string.
;                  $hFormat             - Handle to a GDI+ string format.
; Return values .: 2-row array. [0] is width in pixels; [1] is height in pixels.
; Author ........: Tim Curran; adapted from Pierre Arnaud's C# function
; Modified ......:
; Remarks .......: This much more efficient version is for use with GDI+ fonts
; Related .......:
; Link ..........: <https://www.codeproject.com/Articles/2118/Bypass-Graphics-MeasureString-limitations>
; Example .......: Example-StringInPixels.au3
; ===============================================================================================================================
#include <GDIPlus.au3>
#include <GUIConstantsEx.au3>

Func _StringInPixels_gdip($hGraphic, $sString, $hFont, $tLayout, $hFormat)
    Local $aRanges[2][2] = [[1]]
    $aRanges[1][0] = 0 ;Measure first char (0-based)
    $aRanges[1][1] = StringLen($sString) ;Region = String length

    _GDIPlus_GraphicsSetTextRenderingHint($hGraphic, $GDIP_TEXTRENDERINGHINT_CLEARTYPEGRIDFIT)
    _GDIPlus_StringFormatSetMeasurableCharacterRanges($hFormat, $aRanges) ;Set ranges

    Local $aRegions = _GDIPlus_GraphicsMeasureCharacterRanges($hGraphic, $sString, $hFont, $tLayout, $hFormat) ;get array of regions
    Local $aBounds = _GDIPlus_RegionGetBounds($aRegions[1], $hGraphic)
    Local $aWidthHeight[2] = [$aBounds[2], $aBounds[3]]
    _GDIPlus_RegionDispose($aRegions[1])
    Return $aWidthHeight
EndFunc   ;==>_StringInPixels_gdip

 

_StringInPixels.au3

Example-StringInPixels.au3

Edited by tcurran

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By secman
      Hi,
      I have an issue with a script being used for a Toddler group register. 
      I list the kids, with their carer and additional carer in ComboLists so a number of carers can be registered per kid. 
      When page down to a second page of kids, the carers are correctly displayed but when I roll the mouse over the combo boxes it reverts to those on the first page.
      I am using the following style codes with the combo boxes - BitOR($CBS_DROPDOWN, $CBS_SIMPLE) and they are only holding 2 or 3 entries.
      Here is the code for the pagedisplay function which is called for each line of the registration page (10 lines, currently 55 kid records)) 
      Func PageDisp($L)
      ;Clears display once all records displayed
          If $L > $KidsFound Then
              $Label2[$L] = GUICtrlCreateLabel(" ", 75, $v, 280, 29)
              $Label352[$L] = GUICtrlCreateLabel("", 1040, $v, 100, 29)
              $Label152[$L] = GUICtrlCreateLabel("", 380, $v, 220, 29)
              $Label252[$L] = GUICtrlCreateLabel("",  650, $v, 220, 29);
              Return
          Endif
          $Kid2d = $Kid1d[$L] ; sets value to find additional carers
      If $Kid1a[$L] <> "" then
          $Label2[$L] = GUICtrlCreateLabel("(" & $L & ")" & $Kid1a[$L] & " " & $Kid1b[$L] , 75, $v, 280, 29)
          GUICtrlSetFont(-1, 14, 400, 0, "Segoe UI")
              If $Kid1e[$L] <> "" then
                  $Combo[$L] = GUICtrlCreateCombo("(" & $L & ")"  & $Kid1e[$L], 380, $v, 220, 29, BitOR($CBS_DROPDOWN, $CBS_SIMPLE ))
                  GUICtrlSetData(-1, $Kid1e[$L] & "|" & $Kid1f[$L], $Kid1e[$L])
                  GUICtrlSetFont(-1, 12, 400, 0, "Segoe UI")
                  GUICtrlSetBkColor(-1, 0xFFFFFF)
                  $Label352[$L] = GUICtrlCreateLabel($Kid1c[$L], 1040, $v, 100, 29)
                  if $Kid1f[$L] <> "" then
                      FindCarer($Kid2d) ;finds additional carers 
                      $Combo2[$L] = GUICtrlCreateCombo("(" & $L & ")" & "",  650, $v, 220, 29, BitOR($CBS_DROPDOWN,$CBS_SIMPLE ))
                      GUICtrlSetData(-1, $Combo2List[$L], "")
                      GUICtrlSetFont(-1, 12, 400, 0, "Segoe UI")
                      GUICtrlSetBkColor(-1, 0xFFFFFF)
                      If StringRight($Kid1e[$L],3) = "[L]" Then
                          $Label152[$L] = GUICtrlCreateLabel("", 380, $v, 220, 29)
                          $Label252[$L] = GUICtrlCreateLabel("Leader",  650, $v, 220, 29);
                          GUICtrlSetColor(-1, 0x0000FF)
                      Endif
                  Else
                      $Label252[$L] = GUICtrlCreateLabel("(" & $L & ")" & " No Additional Carers",  650, $v, 220, 29);
                  EndIf
              EndIf
              GUICtrlSetFont(-1, 12, 400, 0, "Segoe UI")
              GUICtrlSetBkColor(-1, 0xFFFFFF)
              CheckReg()
              If $Kid1c[$L] = "Registered" Then
                  $Label52[$L] = GUICtrlCreateLabel($Kid1c[$L], 1040, $v, 100, 29)
                  $Label152[$L] =GUICtrlCreateLabel ($Kid1f[$L],  650, $v, 220, 29);
                  GUICtrlSetFont(-1, 14, 400, 0, "Segoe UI")
                  GUICtrlSetBkColor(-1, 0xFFFFFF)
                  If StringRight($Kid1e[$L],3) = "[L]" Then
                      $Label252[$L] = GUICtrlCreateLabel("", 380, $v, 220, 29)
                      $Label152[$L] = GUICtrlCreateLabel("Leader",  650, $v, 220, 29);
                      GUICtrlSetColor(-1, 0x0000FF)
                  Endif
              Endif
          Endif
      EndFunc
      I hope someone can point me in the right direction as I can't see how this is happening
      Many thanks 
    • By Fenzik
      Hello,
      i searched the forum for something near, but with no success...
      I have Combobox control with $CBS_DROPDOWNLIST style with some items (for example (one, two, nine).
      When i want to select the item, using keyboard, the items are selected only on First letter base (for example when i type "on", Nine is selected).
      Is there some trick to force the combobox with $CBS_DROPDOWNLIST style to accept more than the First letter during selecting the items from the list?
      Mi wanted result is the same as for example - when you type "fir" on the desktop, Firefox is automatically selected.
      Thank you so much.
      Fenzik
    • By t0nZ
      Often I need to create a panel to monitor a lot of things (users, files, items etc) so I use this piece of code to create a dynamic grid of buttons.
      The number of buttons is variable, and it's related to the size of the gui. 
      Every "button" is a set of three with a real button stacked on the top of two labels, imagine reading a .CSV file or an array or a database and displaying all the things using the labels (Text and COLOR too) and clickin' on the relative button you can call further info on the item or call a particular function.
      So you can decide the number of the buttons, the width of the buttons, and also the distance  between buttons.
      It's quick and dirty, simple  and very improvable (I know..) so fell free to play with the code.
       
      ;TEST ;GOL-Grill ;Grill test/template ; (c) 2019 NSC ; V.0.5 #Region ;************ Includes ************ #include <ButtonConstants.au3> #include <GUIConstantsEx.au3> #include <WindowsConstants.au3> #include <StaticConstants.au3> #include <EditConstants.au3> #include <ProgressConstants.au3> #include <_GOLLOG.au3>; NSC first UDF #EndRegion ;************ Includes ************ Dim $agButton[1] Global $ButtonU, $rProgress, $form1, $labeltot, $ntotButtonS Global $guiwidth = 850, $guiheight = 500, $buttonW = 150 ; SMALL GUI / BIG BUTTONS ;Global $guiwidth = 1500, $guiheight = 1000, $buttonW = 45 ; BIG GUI / SMALL BUTTONS <- try it ! Global $ver = "V.0.5" Gollog(">>>>> START") Dim $aResult[11] = [10, "a", "b", "c", "d", "e", "f", "g", "h", "i", "j"] Gui() Gollog("start analyzing...") Monitor() While 1 $nMsg = GUIGetMsg() Switch $nMsg Case $GUI_EVENT_CLOSE CLOSEClicked() Exit Case $ButtonU Monitor() Case Else For $i = 1 To $ntotButtonS If $nMsg = $agButton[$i] Then $Bhit = GUICtrlRead($agButton[$i]) infoB($Bhit) EndIf Next EndSwitch WEnd Func Gui() $form1 = GUICreate("Test Griglia " & $ver & " (c) NSC 2019", $guiwidth, $guiheight, 90, 10) $ButtonU = GUICtrlCreateButton("Update", 2, 2, 170, 50) $labeltot = GUICtrlCreateLabel("Total found", 5, 55) $Gollogedit = GUICtrlCreateEdit("", 2, $guiheight - 255, 180, 250, BitOR($ES_AUTOVSCROLL, $ES_AUTOHSCROLL, $ES_WANTRETURN, $WS_BORDER)) $rProgress = GUICtrlCreateProgress($guiwidth - 18, 5, 16, $guiheight - 7, BitOR($PBS_SMOOTH, $PBS_VERTICAL, $WS_BORDER)) GUICtrlSetColor(-1, 0x00FF00) GUICtrlSetBkColor(-1, 0x000000) GUISetState(@SW_SHOW) EndFunc ;==>Gui Func Monitor() GUIDelete($form1) Gui() $leftSTART = 186 ;left align $topSTART = 5 ;start from top $lineDOWN = 53 ; line distance $extraHSTEP = 5 ; extra line distance $buttonSEMIH = 15 ; height of one of the 3 vertical impiled semibuttons $separatorSEMIH = 2 ;vertical distance between 3 semibuttons $buttonDistance = 7 ;horizontal distance between buttons $separatorW = 2 ;aux horizontal distance ;---------- derived measures $rightLIMIT = $guiwidth - 123 ; right limit befor Carriage Return $leftINCREMENT = $buttonDistance + $buttonW ; horizontal increment button after button $leftSTEP = $leftSTART ;incremental horizontal $topSTEP = $topSTART ;incremental vertical $foundB = $aResult[0] GUICtrlSetData($labeltot, "Found n°" & $foundB) $ntotButtonS = 0 $nomorebuttons = 0 For $i = 1 To $foundB Local $itemFound = $aResult[$i] ;\TA1000 Gollog($itemFound) GUICtrlCreateGroup('', $leftSTEP, $topSTEP - 3, $buttonW + 3, 50) ;______first-----------------------------_______line___________________UNO________11111_____\\\\\\\\\\------------ Local $textbutton = "button n°" & $i _ArrayAdd($agButton, GUICtrlCreateButton($textbutton, $leftSTEP + $separatorSEMIH, $topSTEP + $extraHSTEP, $buttonW, $buttonSEMIH, $BS_flat)) GUICtrlSetBkColor(-1, 0xccffcc) ;green, sort of GUICtrlSetFont(-1, 7, -1, -1, 'verdana') GUICtrlSetColor(-1, 0x000000) ;___second__________line___________________DUE ________222222-------------------------------------------------------------------- Local $textLINE2 = $itemFound GUICtrlCreateLabel($textLINE2, $leftSTEP + $separatorW, $topSTEP + $buttonSEMIH + $separatorSEMIH, $buttonW, $buttonSEMIH, BitOR($SS_CENTER, $SS_CENTERIMAGE)) GUICtrlSetBkColor(-1, 0xD2D7A8) GUICtrlSetFont(-1, 7, -1, -1, 'verdana') GUICtrlSetColor(-1, 0x000000) ; __third______line________tre___________________________________________________________333333-3333333-333333333-333333-33333-33333-3333-------------------------------- Local $textLINE3 = "line3" GUICtrlCreateLabel($textLINE3, $leftSTEP + $separatorW, $topSTEP + $buttonSEMIH + $buttonSEMIH + $separatorSEMIH, $buttonW, $buttonSEMIH, BitOR($SS_CENTER, $SS_CENTERIMAGE)) ; NSC modify GUICtrlSetBkColor(-1, $GUI_BKCOLOR_TRANSPARENT) GUICtrlSetFont(-1, 7, -1, -1, 'verdana') GUICtrlSetColor(-1, 0x000000) $ntotButtonS += 1 GUICtrlSetData($rProgress, (100 * $ntotButtonS / $foundB)) If $leftSTEP + $buttonW < $rightLIMIT Then ; $leftSTEP += $leftINCREMENT ;53 Else $leftSTEP = $leftSTART $topSTEP += $lineDOWN If $topSTEP >= $guiheight - 50 Then $nomorebuttons = 1 Gollog("displayed " & $ntotButtonS & " buttons") Gollog("NO more buttons !") EndIf EndIf Sleep(300) ; REMOVE is only for demo Next While $nomorebuttons = 0 ; draw empty buttons (nice to do) $ntotButtonS += 1 _ArrayAdd($agButton, GUICtrlCreateButton("B-" & $ntotButtonS, $leftSTEP + $separatorSEMIH, $topSTEP + $extraHSTEP, $buttonW, $buttonSEMIH, $BS_flat)) If $leftSTEP + $buttonW < $rightLIMIT Then ; $leftSTEP += $leftINCREMENT Else $leftSTEP = $leftSTART $topSTEP += $lineDOWN If $topSTEP >= $guiheight - 50 Then $nomorebuttons = 1 Gollog("displayed " & $ntotButtonS & " buttons") Gollog("NO more buttons !") EndIf EndIf WEnd GUISetState(@SW_SHOW) EndFunc ;==>Monitor Func infoB($Bhit) ; this function act on the pressed button, it's an example so assign the task you need. gollog("infoB -> " & $Bhit) EndFunc ;==>infoB Func CLOSEClicked() MsgBox(64, "exit", "program exiting", 1) Gollog("<---STOP") Exit EndFunc ;==>CLOSEClicked You will need also the Include from this post for the LOG (Gollog) instructions, but you can also just remove the gollog and the EDIT box.
      Look at the screenshot, It's from an APP made using this code.

    • By ripdad
      I ran across a topic while researching the BASS UDF...
      https://www.autoitscript.com/forum/topic/155845-carpenter-needs-help-performing-serious-surgery-on-audiometer2/ and then remembered another topic...
      https://www.autoitscript.com/forum/topic/121624-sound-level-sampling/ which got me to thinking as to how I could get the first topic to go LIVE without the need of loading an mp3.
      This will accept any LIVE AUDIO INPUT.
      Be sure to read this post if you have trouble with it...
      https://www.autoitscript.com/forum/topic/121624-sound-level-sampling/?do=findComment&comment=1400178 Also, read the comments I made in the script, so you will know how it will react to LIVE INPUT streams.

      Live FFT Visual Spectrum.zip
       

      LIVE Multiband FFT Visual Spectrum.au3
       
    • By therks
      I'm trying to implement a scrolling list of controls. I have it sort of working using the GUIScrollBars_Ex UDF by @Melba23 found here. I also want to be able to tab through the controls, which I have accomplished by adding $WS_EX_CONTROLPARENT to the child GUI. The problem is that with that style applied, the scrollbar doesn't act like a scrollbar, instead it acts as a title bar to the child GUI letting you drag the it around (and you can even "maximize" it by double clicking).
      Any ideas?
      #include <GUIConstants.au3> #include "GUIScrollbars_Ex.au3" $iButtonCount = 30 $hParent = GUICreate('Example', 300, 230) $hChild = GUICreate('', 300, 200, 0, 0, BitOR($WS_CHILD, $WS_TABSTOP), $WS_EX_CONTROLPARENT, $hParent) For $i = 0 To $iButtonCount GUICtrlCreateButton('Button in list', 0, $i*30, 300, 30) Next GUISwitch($hParent) GUICtrlCreateButton('More Buttons', 0, 200, 150, 30) GUICtrlCreateButton('More Buttons', 150, 200, 150, 30) GUISetState(@SW_SHOW, $hParent) GUISetState(@SW_SHOW, $hChild) _GUIScrollbars_Generate($hChild, 100, $iButtonCount * 30+20) While GUIGetMsg() <> $GUI_EVENT_CLOSE WEnd  
×
×
  • Create New...