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


      public BitmapFont read (Json json, Object jsonData, Class type) {
        String path = json.readValue(String.class, jsonData);
        FileHandle file = skinFile.parent().child(path);
        if (!file.exists()) file = Gdx.files.internal(path);
        return new BitmapFont(file, false);
      }
    });


    json.setSerializer(NinePatch.class, new Serializer<NinePatch>() {
      public void write (Json json, NinePatch ninePatch, Class valueType) {

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  public void layout () {
  }


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


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


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

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  public void setItems (String[] items) {
    if (items == null) throw new IllegalArgumentException("items cannot be null.");
    this.items = items;
    selected = 0;


    final BitmapFont font = style.font;
    final NinePatch selectedPatch = style.selectedPatch;
    prefWidth = 0;
    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;
    itemHeight += selectedPatch.getTopHeight() + selectedPatch.getBottomHeight();
    prefWidth += selectedPatch.getLeftWidth() + selectedPatch.getRightWidth();
    prefHeight = items.length * itemHeight;
    textOffsetX = selectedPatch.getLeftWidth();
    textOffsetY = selectedPatch.getTopHeight() - font.getDescent();
  }

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    this.style = style;
  }


  private void calculateBoundsAndScissors (Matrix4 transform) {
    final NinePatch background = style.background;
    final BitmapFont titleFont = style.titleFont;


    widgetBounds.x = background.getLeftWidth();
    widgetBounds.y = background.getBottomHeight();
    widgetBounds.width = width - background.getLeftWidth() - background.getRightWidth();
    widgetBounds.height = height - background.getTopHeight() - background.getBottomHeight();
    ScissorStack.calculateScissors(stage.getCamera(), transform, widgetBounds, scissors);
    titleBounds.x = 0;
    titleBounds.y = height - background.getTopHeight();
    titleBounds.width = width;
    titleBounds.height = background.getTopHeight();
    textBounds.set(titleFont.getBounds(title));
    textBounds.height -= titleFont.getDescent();
  }

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    textBounds.height -= titleFont.getDescent();
  }


  public void draw (SpriteBatch batch, float parentAlpha) {
    final NinePatch backgroundPatch = style.background;
    final BitmapFont titleFont = style.titleFont;
    final Color titleFontColor = style.titleFontColor;


    layout();
    applyTransform(batch);
    calculateBoundsAndScissors(batch.getTransformMatrix());


    batch.setColor(color.r, color.g, color.b, color.a * parentAlpha);
    backgroundPatch.draw(batch, 0, 0, width, height);
    float textY = height - (int)(backgroundPatch.getTopHeight() / 2) + (int)(textBounds.height / 2);
    titleFont.setColor(titleFontColor.r, titleFontColor.g, titleFontColor.b, titleFontColor.a * parentAlpha);
    titleFont.drawMultiLine(batch, title, (int)(width / 2), textY, 0, HAlignment.CENTER);
    batch.flush();


    ScissorStack.pushScissors(scissors);
    super.drawChildren(batch, parentAlpha);
    ScissorStack.popScissors();

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  public void setItems (String[] items) {
    if (items == null) throw new IllegalArgumentException("items cannot be null.");
    this.items = items;


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


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


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


    width = prefWidth;
    height = prefHeight;
  }

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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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      stage.getRoot().focus(this, 0);
      layout();
    }


    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;
      itemHeight += listSelection.getTopHeight() + listSelection.getBottomHeight();
      itemHeight *= ComboBox.this.parent.scaleY;
      prefWidth += listSelection.getLeftWidth() + listSelection.getRightWidth();
      prefHeight = items.length * itemHeight;
      textOffsetX = listSelection.getLeftWidth();
      textOffsetY = listSelection.getTopHeight() + -font.getDescent();


      width = Math.max(prefWidth, ComboBox.this.width);
      width *= ComboBox.this.parent.scaleX;
      height = prefHeight;
      y -= height;

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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(ComboBox.this.parent.scaleX, ComboBox.this.parent.scaleY);
        font.draw(batch, items[i], x + textOffsetX, y + posY - textOffsetY);
        font.setScale(1, 1);
        posY -= itemHeight;
      }
    }

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    }
  }


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


    batch.setColor(color.r, color.g, color.b, color.a * parentAlpha);
    background.draw(batch, x, y, width, height);
    float textY = (int)(height / 2) + (int)(textBounds.height / 2) + font.getDescent() / 2;
    font.setColor(fontColor.r, fontColor.g, fontColor.b, fontColor.a * parentAlpha);
    calculateOffsets();


    if (hasSelection) {
      batch.draw(selection, x + selectionX + background.getLeftWidth() + renderOffset,
        y + textY - textBounds.height - font.getDescent() / 2, selectionWidth, textBounds.height);
    }


    font.draw(batch, text, x + background.getLeftWidth() + textOffset, y + textY, visibleTextStart, visibleTextEnd);
    if (parent.keyboardFocusedActor == this) {
      blink();
      if (cursorOn) {
        cursorPatch.draw(batch, x + background.getLeftWidth() + glyphPositions.get(cursor) + renderOffset - 1, y + textY
          - textBounds.height - font.getDescent(), cursorPatch.getTotalWidth(), textBounds.height + font.getDescent() / 2);
      }
    }
  }

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