on_screen_keyboard: Se empiezan a dibujar algunas teclas en pantalla

units/on_screen_keyboard.cpp

@@ -20,6 +20,14 @@ OnScreenKeyboard::OnScreenKeyboard(SDL_Renderer *renderer, Input *input, string
     char_lower = "abcdefghijklmnopqrstuvwxyz";
     char_numbers = "0123456789";
     char_symbol = " !\"#$%&'()*+,-./:;<=>?@[]";
+    use_char_upper = true;
+    use_char_lower = false;
+    use_char_numbers = false;
+    use_char_symbol = false;
+    totalChars = getTotalChars();
+    columns = getColumns();
+    rows = getRows();
+    setLayout();
     caption = "";
     dest = {(options->screen.nativeWidth - width) / 2, (options->screen.nativeHeight - height) / 2, width, height};
 
@@ -70,10 +78,76 @@ void OnScreenKeyboard::fillTexture()
     SDL_Rect rect = {x_rect, y_rect, w_rect, h_rect};
     SDL_RenderFillRect(renderer, &rect);
 
+    // Dibuja los caracteres que conformaran el teclado
+    int dist = text->getCharacterSize() * 2;
+    for (int i = 0; i < columns; ++i)
+        for (int j = 0; j < rows; ++j)
+        {
+            int pos = i + (j * columns);
+            if (pos < (int)layout.size())
+                text->write(i * dist, j * dist, layout.at(i + (j * columns)));
+        }
+
     // Deja de dibujar en la textura
     SDL_SetRenderTarget(renderer, nullptr);
 }
 
+// Calcula cuantos caracteres se utilizaran para crear el teclado
+int OnScreenKeyboard::getTotalChars()
+{
+    int total = 0;
+    total += use_char_upper ? char_upper.length() : 0;
+    total += use_char_lower ? char_lower.length() : 0;
+    total += use_char_numbers ? char_numbers.length() : 0;
+    total += use_char_symbol ? char_symbol.length() : 0;
+    return total;
+}
+
+// Calcula cuantas columnas necesita el teclado
+int OnScreenKeyboard::getColumns()
+{
+    const int charSize = text->getCharacterSize();
+    int w = width - (charSize * 2);
+    int total = 0;
+    while (w > 0)
+    {
+        w -= (charSize * 2);
+        ++total;
+    }
+    return total;
+}
+
+// Calcula cuantas filas necesita el teclado
+int OnScreenKeyboard::getRows()
+{
+    return totalChars / getColumns();
+}
+
+// Establece la disposición del teclado
+void OnScreenKeyboard::setLayout()
+{
+    totalChars = getTotalChars();
+    columns = getColumns();
+    rows = getRows();
+
+    layout.clear();
+    if (use_char_upper)
+        for (int i = 0; i < char_upper.length(); ++i)
+            layout.push_back(char_upper.substr(i, 1));
+
+    if (use_char_lower)
+        for (int i = 0; i < char_lower.length(); ++i)
+            layout.push_back(char_lower.substr(i, 1));
+
+    if (use_char_numbers)
+        for (int i = 0; i < char_numbers.length(); ++i)
+            layout.push_back(char_numbers.substr(i, 1));
+
+    if (use_char_symbol)
+        for (int i = 0; i < char_symbol.length(); ++i)
+            layout.push_back(char_symbol.substr(i, 1));
+}
+
 // Actualiza la lógica del objeto
 void OnScreenKeyboard::update()
 {
@@ -97,4 +171,15 @@ void OnScreenKeyboard::setCaption(string text)
 {
     caption = text;
     fillTexture();
+}
+
+// Establece qué caracteres ofrecerá el objeto
+void OnScreenKeyboard::setChars(Uint8 mode)
+{
+    use_char_upper = ((mode & USE_UPPER) == USE_UPPER);
+    use_char_lower = ((mode & USE_LOWER) == USE_LOWER);
+    use_char_numbers = ((mode & USE_NUMBER) == USE_NUMBER);
+    use_char_symbol = ((mode & USE_SYMBOL) == USE_SYMBOL);
+    setLayout();
+    fillTexture();
 }