TclQRCodeGenerator

QR codes are actually barcodes using cryptology. So there is no visible information. Only when the QR code is deciphered, information is available at the address you go to.

AddNewQRCodeGenerator(TComponent, xName, xCaption): TclQRCodeGenerator

TComponent : The variable name of the defined component is written. Here you should write the component variable name of whatever your component will be in.

xName : The name of the defined QrCodeGenerator should be written.

xCaption : You can add a title.

Let's create a QrCodeGenerator.

1. Create a new project.

2. You need to define TclQRCodeGenerator on the form. To do this, you should add under the var parameter on the ide as follows. It is the name of your variable you typed at the beginning. You should define this as you want and add it as TclQRCodeGenerator.

var
QRGen : TclQRCodeGenerator; 

3. Add the TclQRCodeGenerator to the form. For this, you must add the begin end block and add it inside the form after the form is defined. By saying MyForm.AddNewQRCodeGenerator, we actually add to the form we have defined. Here, you need to add your form definition as whatever you wrote it.

QRGen := MyForm.AddNewQRCodeGenerator(MyForm,'QRGen','Test QRGen Caption');

4. If you do not want to define it in the form, you can add it in another component (such as Layout, Panel). Of course, before that, that component must be defined.

testLayout := MyForm.AddNewLayout(MyForm,'testLayout');
QRGen:= MyForm.AddNewQRCodeGenerator(testLayout,'QRGen','Test QRGen Caption');

5. While defining the component, you can define it manually by typing. Another method is to write its shortcut. If you type "AddNewQRCodeGenerator" while the shortcut is in the code block, a pop-up menu will appear.

As soon as you click, the following block will come automatically.

AddNewQRCodeGenerator(TComponent, xName, xCaption);

6. We gave the variable name while defining the TclQRCodeGenerator in var. Now when you add this in begin end you should use this variable name in all definitions. Your code will throw an error when you write these variable names incorrectly.

9. Another use of QRCodeGenerator is to add text. If we add text to our component by saying QRGen.text, when the project is run, the title does not appear and the value you have written in the text starts to appear.

QRGen.Text := 'QRGen's Text';

For example, take the value written in an TClEdit component and put it in the QrCodeGenerator and show me this. Below we show you how to do this.

QRGen.Text := testEdit.Text;
ShowMessage(QRGen.Text);

10. Now let's design our TclQRCodeGenerator component. Let's set the width and height first. For this, you must make the following definitions.

QRGen.Height := 50;
QRGen.Width := 150;

11. With the Align parameter, you can specify where you want our component to be aligned in the form. This parameter has multiple positioning properties. See the page to learn about these features. We're going to call it the top part here. So we have to write "AlTop".

QRGen.Align := alTop;

12. With the Margins parameter, you can give margins at any scale from the right, left, bottom, top.

QRGen.Margins.Left:= 50;
QRGen.Margins.Right:= 10; 
QRGen.Margins.Top:= 50;
QRGen.Margins.Bottom:= 10;

13. You may want to activate the click feature on the QRCode. For this, we can activate the click feature by saying "tbeOnGetQRCode" in the AddNewEvent parameter. When clicked, whatever operation will be performed will be written in the last parameter.

MyForm.AddNewEvent(QRGen,tbeOnGetQRCode,'');

14. As soon as you add the QRCode component to the form, a ready-made QR Code comes automatically. By saying "variableName.Text" into the QRCode, you can send data with data types such as integer, date, string. (Don't forget to convert this data to string type.)

In our example, we will pull the date data. If you do not know the FormatDateTime function definition, check the FormatDateTime page. In this way, every value we get is thrown into the QR Code when the button is pressed, and it returns us a new Qr code.

QRGen.Text := FormatDateTime('ddmmyy hhnnss', Now); //dd=day,mm=moon,yy=year  hh=hour,nn=minute, ss= second
BtnNewQrCode.Caption := QRGen.Text;

13. To tell you the truth, you have created a simple application that does nothing yet. Let's save and start using our project. You can save in one of two ways:
Click the save icon (the button in the upper right corner) or press Ctrl + S to save the project and see what you've done on the platforms now.

Example:

var
  MyForm:TclForm;
  QRGen :  TClQRCodeGenerator;
  LytNewQrCode :TclLayout;
  BtnNewQrCode:TclProButton;
 
Procedure BtnNewQrCodeClick;
begin
  QRGen.Text := FormatDateTime('ddmmyy hhnnss', Now); //dd=day,mm=moon,yy=year -- hh=hour,nn=minute, ss= second
  BtnNewQrCode.Caption := QRGen.Text;
End;
  
begin
 MyForm := TclForm.Create(Self);

 LytNewQrCode := MyForm.AddNewLayout(MyForm,'LytNewQrCode');
 LytNewQrCode.Align:=ALTop;
 LytNewQrCode.Height := 200;
 LytNewQrCode.Margins.Top := 30;

 QRGen:= MyForm.AddNewQRCodeGenerator(LytNewQrCode,'QRGen','QRCode');
 QRGen.Height := 200;
 QRGen.Width := 200;
 QRGen.Align := alCenter;
 MyForm.AddNewEvent(QRGen,tbeOnGetQRCode,'');

 BtnNewQrCode:= MyForm.AddNewProButton(MyForm,'BtnNewQrCode','');
 clComponent.SetupComponent(BtnNewQrCode,'{"caption":"RENEW","Align" : "Center","Width" :200,"Height":50,
 "RoundHeight":20,"RoundWidth":10,"BorderColor":"#003399","BorderWidth":2,"TextSize":20,"TextColor":"#4682B4"}');

 MyForm.AddNewEvent(BtnNewQrCode,tbeOnClick,'BtnNewQrCodeClick');

 MyForm.Run;

end;

Output:

• 

  When the Project Opens

• 

  When the Button is Clicked

See Also

• Object Properties
• AddNewEvent