TextViewUtil.java

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// -*- mode: java; c-basic-offset: 2; -*-
// Copyright 2009-2011 Google, All Rights reserved
// Copyright 2011-2012 MIT, All rights reserved
// Released under the Apache License, Version 2.0
// http://www.apache.org/licenses/LICENSE-2.0
 
package com.google.appinventor.components.runtime.util;
 
import com.google.appinventor.components.runtime.Component;
 
import android.content.res.ColorStateList;
import android.graphics.Typeface;
import android.view.Gravity;
import android.widget.TextView;
import android.text.Html;
import android.content.Context;
 
public class TextViewUtil {
 
  private TextViewUtil() {
  }
 
  public static void setAlignment(TextView textview, int alignment, boolean centerVertically) {
    int horizontalGravity;
    switch (alignment) {
      default:
        throw new IllegalArgumentException();
 
      case Component.ALIGNMENT_NORMAL:
        horizontalGravity = Gravity.LEFT;
        break;
 
      case Component.ALIGNMENT_CENTER:
        horizontalGravity = Gravity.CENTER_HORIZONTAL;
        break;
 
      case Component.ALIGNMENT_OPPOSITE:
        horizontalGravity = Gravity.RIGHT;
        break;
    }
    int verticalGravity = centerVertically ? Gravity.CENTER_VERTICAL : Gravity.TOP;
    textview.setGravity(horizontalGravity | verticalGravity);
    textview.invalidate();
  }
 
  public static void setBackgroundColor(TextView textview, int argb) {
    textview.setBackgroundColor(argb);
    textview.invalidate();
  }
 
  public static boolean isEnabled(TextView textview) {
    return textview.isEnabled();
  }
 
  public static void setEnabled(TextView textview, boolean enabled) {
    textview.setEnabled(enabled);
    textview.invalidate();
  }
 
  public static float getFontSize(TextView textview, Context context) {
    float scaledDensity = context.getResources().getDisplayMetrics().scaledDensity;
    return textview.getTextSize()/scaledDensity;
  }
 
  public static void setFontSize(TextView textview, float size) {
    textview.setTextSize(size);
    textview.requestLayout();
  }
 
  public static void setFontTypeface(TextView textview, int typeface,
      boolean bold, boolean italic) {
    Typeface tf;
    switch (typeface) {
      default:
        throw new IllegalArgumentException();
 
      case Component.TYPEFACE_DEFAULT:
        tf = Typeface.DEFAULT;
        break;
 
      case Component.TYPEFACE_SERIF:
        tf = Typeface.SERIF;
        break;
 
      case Component.TYPEFACE_SANSSERIF:
        tf = Typeface.SANS_SERIF;
        break;
 
      case Component.TYPEFACE_MONOSPACE:
        tf = Typeface.MONOSPACE;
        break;
    }
 
    int style = 0;
    if (bold) {
      style |= Typeface.BOLD;
    }
    if (italic) {
      style |= Typeface.ITALIC;
    }
    textview.setTypeface(Typeface.create(tf, style));
    textview.requestLayout();
  }
 
  public static String getText(TextView textview) {
    return textview.getText().toString();
  }
 
  public static void setTextHTML(TextView textview, String text) {
    textview.setText(Html.fromHtml(text));
    textview.requestLayout();
  }
 
  public static void setText(TextView textview, String text) {
    textview.setText(text);
    textview.requestLayout();
  }
 
  public static void setPadding(TextView textview, int padding) {
    textview.setPadding(padding, padding, 0, 0);
    textview.requestLayout();
  }
 
  public static void setTextColor(TextView textview, int argb) {
    textview.setTextColor(argb);
    textview.invalidate();
  }
 
  public static void setTextColors(TextView textview, ColorStateList colorStateList) {
    textview.setTextColor(colorStateList);
  }
 
  public static void setMinWidth(TextView textview, int minWidth) {
    // According to https://developer.android.com/reference/android/widget/TextView.html#setMinWidth(int), the minimum
    // width of TextView is the maximum of setMinWidth and setMinimumWidth. Talk about NIH syndrome!
    textview.setMinWidth(minWidth);
    textview.setMinimumWidth(minWidth);
  }
 
  public static void setMinHeight(TextView textview, int minHeight) {
    // According to https://developer.android.com/reference/android/widget/TextView.html#setMinHeight(int), the minimum
    // height of TextView is the maximum of setMinHeight and setMinimumHeight. Talk about NIH syndrome!
    textview.setMinHeight(minHeight);
    textview.setMinimumHeight(minHeight);
  }
 
  public static void setMinSize(TextView textview, int minWidth, int minHeight) {
    TextViewUtil.setMinWidth(textview, minWidth);
    TextViewUtil.setMinHeight(textview, minHeight);
  }
}