Examples of com.badlogic.gdx.graphics.g2d.BitmapFont

com.badlogic.gdx.graphics.g2d.BitmapFont
Renders bitmap fonts. The font consists of 2 files: an image file or {@link TextureRegion} containing the glyphs and a file inthe AngleCode BMFont text format that describes where each glyph is on the image. Currently only a single image of glyphs is supported.

Text is drawn using a {@link SpriteBatch}. Text can be cached in a {@link BitmapFontCache} for faster rendering of static text,which saves needing to compute the location of each glyph each frame.

* The texture for a BitmapFont loaded from a file is managed. {@link #dispose()} must be called to free the texture when nolonger needed. A BitmapFont loaded using a {@link TextureRegion} is managed if the region's texture is managed. Disposing theBitmapFont disposes the region's texture, which may not be desirable if the texture is still being used elsewhere.

The code is based on Matthias Mann's TWL BitmapFont class. Thanks for sharing, Matthias! :) @author Nathan Sweet @author Matthias Mann

    return style;
  }


  @Override
  public void draw (SpriteBatch batch, float parentAlpha) {
    BitmapFont font = style.font;
    NinePatch selectedPatch = style.selectedPatch;
    Color fontColorSelected = style.fontColorSelected;
    Color fontColorUnselected = style.fontColorUnselected;


    batch.setColor(color.r, color.g, color.b, color.a * parentAlpha);


    font.setColor(fontColorUnselected.r, fontColorUnselected.g, fontColorUnselected.b, fontColorUnselected.a * parentAlpha);
    float itemY = height;
    for (int i = 0; i < items.length; i++) {
      if (cullingArea == null || 
        (itemY - itemHeight <= cullingArea.y + cullingArea.height && itemY >= cullingArea.y)) {
        if (selected == i) {
          selectedPatch.draw(batch, x, y + itemY - itemHeight, Math.max(prefWidth, width), itemHeight);
          font.setColor(fontColorSelected.r, fontColorSelected.g, fontColorSelected.b, fontColorSelected.a * parentAlpha);
        }
        font.draw(batch, items[i], x + textOffsetX, y + itemY - textOffsetY);
        if (selected == i) {
          font.setColor(fontColorUnselected.r, fontColorUnselected.g, fontColorUnselected.b, fontColorUnselected.a
            * parentAlpha);
        }
      } else if (itemY < cullingArea.y) {
        break;
      }

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    } else
      items = (String[])objects;


    selected = 0;


    final BitmapFont font = style.font;
    final NinePatch selectedPatch = style.selectedPatch;


    itemHeight = font.getCapHeight() - font.getDescent() * 2;
    itemHeight += selectedPatch.getTopHeight() + selectedPatch.getBottomHeight();
    prefWidth += selectedPatch.getLeftWidth() + selectedPatch.getRightWidth();
    textOffsetX = selectedPatch.getLeftWidth();
    textOffsetY = selectedPatch.getTopHeight() - font.getDescent();


    prefWidth = 0;
    for (int i = 0; i < items.length; i++) {
      TextBounds bounds = font.getBounds(items[i]);
      prefWidth = Math.max(bounds.width, prefWidth);
    }
    prefHeight = items.length * itemHeight;


    invalidateHierarchy();

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    }
  }


  @Override
  public void draw (SpriteBatch batch, float parentAlpha) {
    final BitmapFont font = style.font;
    final Color fontColor = style.fontColor;
    final TextureRegion selection = style.selection;
    final NinePatch cursorPatch = style.cursor;


    batch.setColor(color.r, color.g, color.b, color.a * parentAlpha);
    float bgLeftWidth = 0;
    if (style.background != null) {
      style.background.draw(batch, x, y, width, height);
      bgLeftWidth = style.background.getLeftWidth();
    }


    float textY = (int)(height / 2 + textBounds.height / 2 + font.getDescent());
    calculateOffsets();


    boolean focused = stage != null && stage.getKeyboardFocus() == this;
    if (focused && hasSelection && selection != null) {
      batch.draw(selection, x + selectionX + bgLeftWidth + renderOffset,
        y + textY - textBounds.height - font.getDescent() / 2, selectionWidth, textBounds.height);
    }


    if (displayText.length() == 0) {
      if (!focused && messageText != null) {
        if (style.messageFontColor != null) {
          font.setColor(style.messageFontColor.r, style.messageFontColor.g, style.messageFontColor.b,
            style.messageFontColor.a * parentAlpha);
        } else
          font.setColor(0.7f, 0.7f, 0.7f, parentAlpha);
        BitmapFont messageFont = style.messageFont != null ? style.messageFont : font;
        font.draw(batch, messageText, x + bgLeftWidth, y + textY);
      }
    } else {
      font.setColor(fontColor.r, fontColor.g, fontColor.b, fontColor.a * parentAlpha);
      font.draw(batch, displayText, x + bgLeftWidth + textOffset, y + textY, visibleTextStart, visibleTextEnd);

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    cursor = Math.max(0, glyphPositions.size - 1);
    return true;
  }


  public boolean keyDown (int keycode) {
    final BitmapFont font = style.font;


    if (stage != null && stage.getKeyboardFocus() == this) {
      if (Gdx.input.isKeyPressed(Keys.CONTROL_LEFT) || Gdx.input.isKeyPressed(Keys.CONTROL_RIGHT)) {
        // paste
        if (keycode == Keys.V) paste();

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    cursor = minIndex;
    clearSelection();
  }


  public boolean keyTyped (char character) {
    final BitmapFont font = style.font;


    if (stage != null && stage.getKeyboardFocus() == this) {
      if (character == BACKSPACE && (cursor > 0 || hasSelection)) {
        if (!hasSelection) {
          text = text.substring(0, cursor - 1) + text.substring(cursor);
          updateDisplayText();
          cursor--;
        } else {
          delete();
        }
      }
      if (character == DELETE) {
        if (cursor < text.length() || hasSelection) {
          if (!hasSelection) {
            text = text.substring(0, cursor) + text.substring(cursor + 1);
            updateDisplayText();
          } else {
            delete();
          }
        }
        return true;
      }
      if (character != ENTER_DESKTOP && character != ENTER_ANDROID) {
        if (filter != null && !filter.acceptChar(this, character)) return true;
      }
      if (character == TAB || character == ENTER_ANDROID)
        next(Gdx.input.isKeyPressed(Keys.SHIFT_LEFT) || Gdx.input.isKeyPressed(Keys.SHIFT_RIGHT));
      if (font.containsCharacter(character)) {
        if (!hasSelection) {
          text = text.substring(0, cursor) + character + text.substring(cursor, text.length());
          updateDisplayText();
          cursor++;
        } else {

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  }


  public void setText (String text) {
    if (text == null) throw new IllegalArgumentException("text cannot be null.");


    BitmapFont font = style.font;


    StringBuffer buffer = new StringBuffer();
    for (int i = 0; i < text.length(); i++) {
      char c = text.charAt(i);
      if (font.containsCharacter(c)) buffer.append(c);
    }


    this.text = buffer.toString();
    updateDisplayText();
    cursor = 0;
    clearSelection();


    textBounds.set(font.getBounds(displayText));
    textBounds.height -= font.getDescent() * 2;
    font.computeGlyphAdvancesAndPositions(displayText, glyphAdvances, glyphPositions);
  }

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    }


    this.items = (String[])objects;


    NinePatch bg = style.background;
    BitmapFont font = style.font;


    prefHeight = Math.max(bg.getTopHeight() + bg.getBottomHeight() + font.getCapHeight() - font.getDescent() * 2,
      bg.getTotalHeight());


    float max = 0;
    for (int i = 0; i < items.length; i++)
      max = Math.max(font.getBounds(items[i]).width, max);
    prefWidth = bg.getLeftWidth() + bg.getRightWidth() + max;


    invalidateHierarchy();
  }

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  }


  @Override
  public void draw (SpriteBatch batch, float parentAlpha) {
    final NinePatch background = style.background;
    final BitmapFont font = style.font;
    final Color fontColor = style.fontColor;


    batch.setColor(color.r, color.g, color.b, color.a * parentAlpha);
    background.draw(batch, x, y, width, height);
    if (items.length > 0) {
      float availableWidth = width - background.getLeftWidth() - background.getRightWidth();
      int numGlyphs = font.computeVisibleGlyphs(items[selection], 0, items[selection].length(), availableWidth);
      bounds.set(font.getBounds(items[selection]));
      float textY = (int)(height / 2) + (int)(bounds.height / 2);
      font.setColor(fontColor.r, fontColor.g, fontColor.b, fontColor.a * parentAlpha);
      font.draw(batch, items[selection], x + background.getLeftWidth(), y + textY, 0, numGlyphs);
    }


    // calculate screen coords where list should be displayed
    ScissorStack.toWindowCoordinates(stage.getCamera(), batch.getTransformMatrix(), screenCoords.set(x, y));
  }

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      else
        this.y = y - height;
    }


    private void layout () {
      final BitmapFont font = style.font;
      final NinePatch listSelection = style.listSelection;


      float prefWidth = 0;
      float prefHeight = 0;


      for (int i = 0; i < items.length; i++) {
        String item = items[i];
        TextBounds bounds = font.getBounds(item);
        prefWidth = Math.max(bounds.width, prefWidth);
      }


      itemHeight = font.getCapHeight() + -font.getDescent() * 2 + style.itemSpacing;
      itemHeight += listSelection.getTopHeight() + listSelection.getBottomHeight();
      itemHeight *= SelectBox.this.parent.scaleY;
      prefWidth += listSelection.getLeftWidth() + listSelection.getRightWidth() + 2 * style.itemSpacing;
      prefHeight = items.length * itemHeight;
      textOffsetX = listSelection.getLeftWidth() + style.itemSpacing;
      textOffsetY = listSelection.getTopHeight() + -font.getDescent() + style.itemSpacing / 2;


      width = Math.max(prefWidth, SelectBox.this.width);
      width *= SelectBox.this.parent.scaleX;
      height = prefHeight;
    }

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    @Override
    public void draw (SpriteBatch batch, float parentAlpha) {
      final NinePatch listBackground = style.listBackground;
      final NinePatch listSelection = style.listSelection;
      final BitmapFont font = style.font;
      final Color fontColor = style.fontColor;


      batch.setColor(color.r, color.g, color.b, color.a * parentAlpha);
      listBackground.draw(batch, x, y, width, height);
      float posY = height;
      for (int i = 0; i < items.length; i++) {
        if (selected == i) {
          listSelection.draw(batch, x, y + posY - itemHeight, width, itemHeight);
        }
        font.setColor(fontColor.r, fontColor.g, fontColor.b, fontColor.a * parentAlpha);
        font.setScale(SelectBox.this.parent.scaleX, SelectBox.this.parent.scaleY);
        font.draw(batch, items[i], x + textOffsetX, y + posY - textOffsetY);
        font.setScale(1, 1);
        posY -= itemHeight;
      }
    }

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