1 files changed, 156 insertions, 0 deletions
diff --git a/src/com/android/settings/FontDialogPreference.java b/src/com/android/settings/FontDialogPreference.java
new file mode 100644
index 0000000..e9906e0
--- /dev/null
+++ b/src/com/android/settings/FontDialogPreference.java
@@ -0,0 +1,156 @@
+package com.android.settings;
+
+import android.app.ActivityManagerNative;
+import android.content.Context;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.content.res.TypedArray;
+import android.os.RemoteException;
+import android.preference.DialogPreference;
+import android.preference.Preference;
+import android.provider.Settings;
+import android.util.AttributeSet;
+import android.util.DisplayMetrics;
+import android.util.Log;
+import android.util.TypedValue;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.SeekBar;
+import android.widget.TextView;
+
+public class FontDialogPreference extends DialogPreference
+    implements SeekBar.OnSeekBarChangeListener {
+
+    private TextView mDescriptionText;
+    private TextView mPercentageText;
+    private IntervalSeekBar mSeekBar;
+
+    private DisplayMetrics mDisplayMetrics;
+    private int mLargeTextSp;
+    private int mSmallTextSp;
+
+    public FontDialogPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+
+        setPositiveButtonText(android.R.string.ok);
+        setNegativeButtonText(android.R.string.cancel);
+
+        initDisplayMetrics();
+
+        setDialogLayoutResource(R.layout.preference_dialog_fontsize);
+        setDialogTitle(null); // Hide the title bar
+    }
+
+    @Override
+    protected View onCreateDialogView() {
+        LayoutInflater inflater =
+                (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        View view = inflater.inflate(R.layout.preference_dialog_fontsize, null);
+
+        mDescriptionText = (TextView) view.findViewById(R.id.description);
+        mPercentageText = (TextView) view.findViewById(R.id.percentage);
+
+        // Calculate original sp sizes for the text views
+        mLargeTextSp = Math.round(mDescriptionText.getTextSize() / mDisplayMetrics.scaledDensity);
+        mSmallTextSp = Math.round(mPercentageText.getTextSize() / mDisplayMetrics.scaledDensity);
+
+        mSeekBar = (IntervalSeekBar) view.findViewById(R.id.font_size);
+
+        String strFontSize = getPersistedString(String.valueOf(mSeekBar.getDefault()));
+        float fontSize = Float.parseFloat(strFontSize);
+
+        mSeekBar.setProgressFloat(fontSize);
+        mSeekBar.setOnSeekBarChangeListener(this);
+
+        setPrompt(fontSize);
+
+        return view;
+    }
+
+    private void initDisplayMetrics() {
+        DisplayMetrics metrics = getContext().getResources().getDisplayMetrics();
+        mDisplayMetrics = new DisplayMetrics();
+        mDisplayMetrics.density = metrics.density;
+        mDisplayMetrics.heightPixels = metrics.heightPixels;
+        mDisplayMetrics.scaledDensity = metrics.scaledDensity;
+        mDisplayMetrics.widthPixels = metrics.widthPixels;
+        mDisplayMetrics.xdpi = metrics.xdpi;
+        mDisplayMetrics.ydpi = metrics.ydpi;
+    }
+
+    @Override
+    protected void onDialogClosed(boolean positiveResult) {
+        if (positiveResult) {
+            // Notify the Display settings screen (parent) that the font size
+            // is about to change. This can determine whether to persist the
+            // current value
+            if (callChangeListener(mSeekBar.getProgressFloat())) {
+                // Originally font scaling was a float stored as a String,
+                // so using persistFloat raises a ClassCastException
+                persistString(Float.toString(mSeekBar.getProgressFloat()));
+            }
+        }
+    }
+
+    @Override
+    protected void onClick() {
+        // Ignore this until an explicit call to click()
+    }
+
+    public void click() {
+        super.onClick();
+    }
+
+    /**
+     * Get an approximate description for the font size scale.
+     *  Assumes that the string arrays entries_font_size and
+     *  entryvalues_font_size have the same length and correspond to each other
+     *  i.e. they are in the same order.
+     */
+    static String getFontSizeDescription(Resources r, float val) {
+        String[] names = r.getStringArray(R.array.entries_font_size);
+        String[] indices = r.getStringArray(R.array.entryvalues_font_size);
+
+        float lastVal = Float.parseFloat(indices[0]);
+        for (int i = 1; i < indices.length; i++) {
+            float thisVal = Float.parseFloat(indices[i]);
+            if (val < (lastVal + (thisVal-lastVal)*.5f)) {
+                return names[i - 1];
+            }
+            lastVal = thisVal;
+        }
+        return names[indices.length - 1];
+    }
+
+    /**
+     * Set the TextView indicating the font scaling
+     */
+    private void setPrompt(float fontScaling) {
+        // Update the preview text
+        String percentage = Math.round(fontScaling * 100) + "%";
+        mPercentageText.setText(percentage);
+
+        // Update the preview sizes
+        mDisplayMetrics.scaledDensity = mDisplayMetrics.density * fontScaling;
+        float largeSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, mLargeTextSp,
+                mDisplayMetrics);
+        float smallSize = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, mSmallTextSp,
+                mDisplayMetrics);
+        mDescriptionText.setTextSize(TypedValue.COMPLEX_UNIT_PX, largeSize);
+        mPercentageText.setTextSize(TypedValue.COMPLEX_UNIT_PX, smallSize);
+    }
+
+    @Override
+    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
+        setPrompt(mSeekBar.getProgressFloat());
+    }
+
+    // Not used
+    @Override
+    public void onStartTrackingTouch(SeekBar seekBar) {
+    }
+
+    @Override
+    public void onStopTrackingTouch(SeekBar seekBar) {
+    }
+}