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Scale text up

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serso 2016-02-06 23:46:39 +01:00
parent aac0d7730b
commit 5fb04114a8
1 changed files with 26 additions and 4 deletions
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30
app/src/main/java/org/solovyev/android/views/AutoResizeTextView.java
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@ -21,6 +21,10 @@ import android.text.TextPaint;
import android.util.AttributeSet; import android.util.AttributeSet;
import android.util.TypedValue; import android.util.TypedValue;
import android.widget.TextView; import android.widget.TextView;
import hugo.weaving.DebugLog;
import static android.util.TypedValue.COMPLEX_UNIT_SP;
import static android.util.TypedValue.applyDimension;
/** /**
* Text view that auto adjusts text size to fit within the view. * Text view that auto adjusts text size to fit within the view.
@ -30,6 +34,7 @@ import android.widget.TextView;
* @author Chase Colburn * @author Chase Colburn
* @since Apr 4, 2011 * @since Apr 4, 2011
*/ */
@DebugLog
@SuppressWarnings("unused") @SuppressWarnings("unused")
public class AutoResizeTextView extends TextView { public class AutoResizeTextView extends TextView {
@ -54,6 +59,7 @@ public class AutoResizeTextView extends TextView {
// Add ellipsis to text that overflows at the smallest text size // Add ellipsis to text that overflows at the smallest text size
private boolean mAddEllipsis = true; private boolean mAddEllipsis = true;
private final TextPaint tmpPaint = new TextPaint(); private final TextPaint tmpPaint = new TextPaint();
private final float mStep;
// Default constructor override // Default constructor override
public AutoResizeTextView(Context context) { public AutoResizeTextView(Context context) {
@ -69,6 +75,8 @@ public class AutoResizeTextView extends TextView {
public AutoResizeTextView(Context context, AttributeSet attrs, int defStyle) { public AutoResizeTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle); super(context, attrs, defStyle);
mTextSize = getTextSize(); mTextSize = getTextSize();
mStep = Math.max(2, applyDimension(COMPLEX_UNIT_SP, 1, getResources().getDisplayMetrics()));
} }
/** /**
@ -230,10 +238,24 @@ public class AutoResizeTextView extends TextView {
// Get the required text height // Get the required text height
int textHeight = getTextHeight(text, textPaint, width, targetTextSize); int textHeight = getTextHeight(text, textPaint, width, targetTextSize);
// Until we either fit within our text view or we had reached our min text size, incrementally try smaller sizes if (textHeight > height && targetTextSize > mMinTextSize) {
while (textHeight > height && targetTextSize > mMinTextSize) { // Until we either fit within our text view or we had reached our min text size, incrementally try smaller sizes
targetTextSize = Math.max(targetTextSize - 2, mMinTextSize); while (textHeight > height && targetTextSize > mMinTextSize) {
textHeight = getTextHeight(text, textPaint, width, targetTextSize); targetTextSize = Math.max(targetTextSize - mStep, mMinTextSize);
textHeight = getTextHeight(text, textPaint, width, targetTextSize);
}
} else if (textHeight < height) {
// Try bigger sizes until we fill the view
float newTargetTextSize = targetTextSize;
int newTextHeight = textHeight;
while (newTextHeight < height) {
// use last values which don't exceed view dimensions
targetTextSize = newTargetTextSize;
textHeight = newTextHeight;
newTargetTextSize += mStep;
newTextHeight = getTextHeight(text, textPaint, width, newTargetTextSize);
}
} }
// If we had reached our minimum text size and still don't fit, append an ellipsis // If we had reached our minimum text size and still don't fit, append an ellipsis