Beispiel: eine einfach Form

Dieses Beispiel fasst nochmal die vorherigen Tutorials zum Erstellen von eigenen Formen zusammen und stellt eine neue Form vor. Die Form ist nochmal ausführlich kommentiert.

class SimpleForm : public Form //create a new form which inherits the Form class
{
private:
        Label *helloLabel;
        Button *countButton;
        Label *countLabel;
        
        void InitializeComponent() //this method initialize all controls
        {
                this->SetText("Simple Form"); //set form caption
                this->SetBounds(10, 10, 400, 300); //place form at (10/10) with 400x300px size
                
                helloLabel = new Label(); //create a new Label with parent = this
                helloLabel->SetName("helloLabel"); //set the name so you can use GetControlByName(...)
                helloLabel->SetText("Hello, I'm a Label. :)"); //set the text
                helloLabel->SetLocation(6, 6); //set the position relative to the form
                //no need to set the size because a label has autosize
                //to disable autosize use helloLabel->SetAutoSize(false);
                this->AddControl(helloLabel); //add helloLabel to the forms controllist
                
                countButton = new Button(); //create a new Button with parent = this
                countButton->SetName("countButton"); //set the name so you can use GetControlByName(...)
                countButton->SetText("press me"); //set the text
                v->SetLocation(5, 25); //set the position and use default button size
                //to set the size use SetSize or SetBounds or use autosize => SetAutoSize(true)
                countButton->GetClickEvent() += ClickEventHandler([this](Control *control)
                { //this method will be called every time you click the button
                        countButton_Click(control);
                });
                //add an onclickevent to the button using a lambdaexpression
                //if you don't like lambdas you can use this version:
                //countButton->GetClickEvent() += ClickEventHandler(std::bind(&SimpleForm::button_Click, this, std::placeholders::_1, std::placeholders::_2));
                this->AddControl(countButton);
        
                countLabel = new Label(); //create a new Label with parent = this
                countLabel->SetName("countLabel"); //set the name so you can use GetControlByName(...)
                countLabel->SetText("Button pressed 0 times"); //set the text
                countLabel->SetLocation(6, 50); //set the position
                countLabel->SetTag(Misc::Any(0)); //set the tag. The tag can hold every datatype. We can use it to count the buttonclicks.
                this->AddControl(countLabel);
        }

public:
        SimpleForm()
        {
                InitializeComponent(); //just call this method to initialize all controls
        }
        
private:
        void countButton_Click(Control *sender)
        {
                //read old count value from tag
                Any tag = countLabel->GetTag();
                int count = tag.CastTo<int>();
                //and increase it
                ++count;
                //use the Strings::Format method to create a new string
                Misc::AnsiString test = Misc::String::Format("Button pressed %u times", count);
                //and set it as text
                countLabel->SetText(test);
                //set the new count as tag
                tag = count;
                countLabel->SetTag(tag);
        }
};