TQuickPDF0813.DrawText

Hi Micha,

Here an overview on the properties around Textheight:

To have text of different size readable in a line, all is drawn on the baseline. It's so in Word, in PDF and it makes sense. But inside a technical drawing, you may want a spezial alignment and so you need some calculations around size. You may get all information by GetTextAscent, GetTextDescent, GetTextBound(...), GetTextHeight, GetTextWidth. But keep in mind, that SetTextSize works ever with points.

Here a codesnippet for the above painting in D7:

var
QP: TQuickPDF;
s: string;
x, y,
tf, ta, td, tt, th, ts, tw: double;
begin
QP := TQuickPDF.Create;
QP.UnlockKey(...
QP.SetMeasurementUnits(1);      // millimeters
QP.SetPageDimensions(210, 297); // DIN A4
QP.SetOrigin(0);                // bottomleft
x := 20; y := 20;
s := 'Ä happy ÉgÊ¦Ç';           // to have real things on all lines

QP.AddStandardFont(11);         // as you like
tf := 24*72/25.4;               // 24 mm as points
QP.SetTextSize(tf);
ta := QP.GetTextAscent;         // get all we can need
td := QP.GetTextDescent;
tt := QP.GetTextBound(2);
th := QP.GetTextHeight;
ts := QP.GetTextSize*25.4/72;   // points to mm
tw := QP.GetTextWidth(s);
QP.DrawText(x, y, s);

tf := 4*72/25.4;                // 4 mm as points
QP.SetTextSize(tf);

QP.SetLineWidth(0.1);
QP.SetLineColor(1, 0, 0); // Baseline
QP.DrawLine(x-10, y, x+tw+5, y); QP.DrawText(x+tw+6, y, 'Baseline');
QP.SetLineColor(0, 1, 0);      // Ascent
QP.DrawLine(x-10, y+ta, x+tw+5, y+ta); QP.DrawText(x+tw+6, y+ta, 'Ascent');
QP.SetLineColor(0, 0, 1);      // Descent = abs(Bottom)
QP.DrawLine(x-10, y+td, x+tw+5, y+td); QP.DrawText(x+tw+6, y+td, 'Descent');
QP.SetLineColor(0, 0.5, 0.5); // Top
QP.DrawLine(x-10, y+tt, x+tw+5, y+tt); QP.DrawText(x+tw+6, y+tt, 'Top');

QP.AddStandardFont(4);
QP.SetTextSize(tf);
QP.DrawText(x, y-10, Format('Ascent=%.2f Descent=%.2f Top=%.2f Textsize=%.2f Delta=%.2f',[ta, td, tt, ts, tt-ta]));

Cheers,

Werner

Edited by edvoigt - 05 Nov 13 at 11:35AM

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micha Members Profile Find Members Posts Beginner Joined: 18 Dec 11 Status: Offline Points: 3	Post Options Post Reply Quote micha Report Post Thanks(0) Quote Reply Topic: TQuickPDF0813.DrawText Posted: 18 Dec 11 at 3:48PM
	hello, im using delphi 7 when using the DrawText function the text is drawn over the y position does anyone know how to draw the text under the y position ? thanks micha

Ingo Members Profile Find Members Posts Moderator Group Joined: 29 Oct 05 Status: Offline Points: 3524	Post Options Post Reply Quote Ingo Report Post Thanks(0) Quote Reply Posted: 18 Dec 11 at 8:15PM
	Hi Micha! Perhaps it's better to post the used code-snippet. If you're asking about orientation you should use SetOrigin. Please read here: http://www.quickpdflibrary.com/help/quickpdf/SetOrigin.php Cheers and welcome here, Ingo

AndrewC Members Profile Find Members Posts Moderator Group Joined: 08 Dec 10 Location: Geelong, Aust Status: Offline Points: 841	Post Options Post Reply Quote AndrewC Report Post Thanks(0) Quote Reply Posted: 19 Dec 11 at 10:04PM
	Text is a PDF file is drawn on the baseline. If you want to draw text from the top of the font cell or the top of the characters then you would use either GetTextHeight or GetTextAscent QP.SetOrigin(1); QP.DrawLine(30, 30, 400, 30); QP.DrawText(30, 30 - QP.GetTextHeight(), "Hello World using text height"); QP.DrawLine(30, 60, 400, 60); QP.DrawText(30, 60 - QP.GetTextAscent(), "Hello World using ascent");

edvoigt Members Profile Find Members Posts Senior Member Joined: 26 Mar 11 Location: Berlin, Germany Status: Offline Points: 111	Post Options Post Reply Quote edvoigt Report Post Thanks(0) Quote Reply Posted: 20 Dec 11 at 2:31PM
	Hi Micha, Here an overview on the properties around Textheight: To have text of different size readable in a line, all is drawn on the baseline. It's so in Word, in PDF and it makes sense. But inside a technical drawing, you may want a spezial alignment and so you need some calculations around size. You may get all information by GetTextAscent, GetTextDescent, GetTextBound(...), GetTextHeight, GetTextWidth. But keep in mind, that SetTextSize works ever with points. Here a codesnippet for the above painting in D7: var QP: TQuickPDF; s: string; x, y, tf, ta, td, tt, th, ts, tw: double; begin QP := TQuickPDF.Create; QP.UnlockKey(... QP.SetMeasurementUnits(1); // millimeters QP.SetPageDimensions(210, 297); // DIN A4 QP.SetOrigin(0); // bottomleft x := 20; y := 20; s := 'Ä happy ÉgÊ¦Ç'; // to have real things on all lines QP.AddStandardFont(11); // as you like tf := 2472/25.4; // 24 mm as points QP.SetTextSize(tf); ta := QP.GetTextAscent; // get all we can need td := QP.GetTextDescent; tt := QP.GetTextBound(2); th := QP.GetTextHeight; ts := QP.GetTextSize25.4/72; // points to mm tw := QP.GetTextWidth(s); QP.DrawText(x, y, s); tf := 4*72/25.4; // 4 mm as points QP.SetTextSize(tf); QP.SetLineWidth(0.1); QP.SetLineColor(1, 0, 0); // Baseline QP.DrawLine(x-10, y, x+tw+5, y); QP.DrawText(x+tw+6, y, 'Baseline'); QP.SetLineColor(0, 1, 0); // Ascent QP.DrawLine(x-10, y+ta, x+tw+5, y+ta); QP.DrawText(x+tw+6, y+ta, 'Ascent'); QP.SetLineColor(0, 0, 1); // Descent = abs(Bottom) QP.DrawLine(x-10, y+td, x+tw+5, y+td); QP.DrawText(x+tw+6, y+td, 'Descent'); QP.SetLineColor(0, 0.5, 0.5); // Top QP.DrawLine(x-10, y+tt, x+tw+5, y+tt); QP.DrawText(x+tw+6, y+tt, 'Top'); QP.AddStandardFont(4); QP.SetTextSize(tf); QP.DrawText(x, y-10, Format('Ascent=%.2f Descent=%.2f Top=%.2f Textsize=%.2f Delta=%.2f',[ta, td, tt, ts, tt-ta])); Cheers, Werner Edited by edvoigt - 05 Nov 13 at 11:35AM