Update textArea's wildcard programatically inside keyboard

[jchernus-fikst]

Hi again,

I'm looking to implement a character limit on a keyboard, as seen by the red 30/30 text in the screen below. 

In CustomKeyboard.hpp I added:

    /**
     * The buffer used to hold the ASCII representation of the key count (e.g., "5/30").
     */
    Unicode::UnicodeChar keyCountTextAreaBuffer[KEYCOUNTTEXTAREA_SIZE];

    /**
     * Used to display the count of the characters entered / total allowed.
     */
    TextAreaWithOneWildcard keyCountTextArea;

And in CustomKeyboard.cpp there's some logic to add that textArea to the screen:

CustomKeyboard::CustomKeyboard() : keyboard(),
    keyCountTextArea(),
    modeBtnTextArea(),
    enterBtnTextArea(),
    capslockPressed(this, &CustomKeyboard::capslockPressedHandler),
    backspacePressed(this, &CustomKeyboard::backspacePressedHandler),
    modePressed(this, &CustomKeyboard::modePressedHandler),
    enterPressed(this, &CustomKeyboard::enterPressedHandler),
    keyPressed(this, &CustomKeyboard::keyPressedHandler),
    alphaKeys(true),
    uppercaseKeys(false),
    firstCharacterEntry(false)
{
    alphaLayout.callbackAreaArray[0].callback = &capslockPressed;
    alphaLayout.callbackAreaArray[1].callback = &backspacePressed;
    alphaLayout.callbackAreaArray[2].callback = &modePressed;
    alphaLayout.callbackAreaArray[3].callback = &enterPressed;

    numLayout.callbackAreaArray[0].callback = &backspacePressed;
    numLayout.callbackAreaArray[1].callback = &modePressed;
    numLayout.callbackAreaArray[2].callback = &enterPressed;

    keyboard.setLayout(&alphaLayout);
    keyboard.setKeyListener(keyPressed);
    keyboard.setPosition(0, 0, 480, 320);
    keyboard.setTextIndentation();

    memset(buffer, 0, sizeof(buffer));
    keyboard.setBuffer(buffer, BUFFER_SIZE);

    uppercaseKeys = true;
    firstCharacterEntry = true;

    keyCountTextArea.setPosition(FIRST_ROW_X + 386, ZEROETH_ROW_Y, ENTER_MODE_WIDTH, KEY_HEIGHT);
    keyCountTextArea.setColor(Color::getColorFromRGB(0xFF, 0xFF, 0xFF));

    modeBtnTextArea.setPosition(FIRST_ROW_X, FOURTH_ROW_Y + 8, ENTER_MODE_WIDTH, KEY_HEIGHT);
    modeBtnTextArea.setColor(Color::getColorFromRGB(0xFF, 0xFF, 0xFF));

    enterBtnTextArea.setPosition(ENTER_X, FOURTH_ROW_Y + 8, ENTER_MODE_WIDTH, KEY_HEIGHT);
    enterBtnTextArea.setColor(Color::getColorFromRGB(0xFF, 0xFF, 0xFF));
    enterBtnTextArea.setTypedText(TypedText(T_ENTER));

    setKeyMappingList();

    add(keyboard);
    add(keyCountTextArea);
    add(modeBtnTextArea);
    add(enterBtnTextArea);
}

 And then I have the following function which implements the logic for key counting:

void CustomKeyboard::updateKeyCount()
{
    int keyCount = keyboard.getBufferPosition();

    Unicode::snprintf(keyCountTextAreaBuffer, sizeof(keyCountTextAreaBuffer), "%u/%u", keyCount, BUFFER_SIZE - 1);
    if (keyCount >= BUFFER_SIZE - 1)
    {
        keyCountTextArea.setColor(Color::getColorFromRGB(0xFF, 0x00, 0x00));
    }
    else
    {
        keyCountTextArea.setColor(Color::getColorFromRGB(0xFF, 0xFF, 0xFF));
    }
    keyCountTextArea.setWildcard(keyCountTextAreaBuffer);
    keyCountTextArea.invalidate();
}

I call this function from `keyPressedHandler` and `backspacePressedHandler`, however I never see the text appear.

I tried adding some logic that conditionally determines which TypedText to display in the textArea, and that works fine.

void CustomKeyboard::updateKeyCount()
{
    int keyCount = keyboard.getBufferPosition();

    if (keyCount >= BUFFER_SIZE - 1)
    {
        keyCountTextArea.setTypedText(TypedText(T_HITLIMIT));
    }
    else
    {
        keyCountTextArea.setTypedText(TypedText(T_ALLGOOD));
    }
    keyCountTextArea.invalidate();
}

I must be doing something silly with wildcards! Any help is appreciated, thank you,

Julia