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android_calculator-7: Bug with displaying result

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serso 2011-11-12 16:18:36 +04:00
parent 4e8f860409
commit 92b2a27edf
1 changed files with 45 additions and 20 deletions
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65
src/main/java/org/solovyev/android/view/AutoResizeTextView.java
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@ -8,11 +8,12 @@ package org.solovyev.android.view;
import android.content.Context; import android.content.Context;
import android.graphics.Canvas; import android.graphics.Canvas;
import android.text.Editable;
import android.text.Layout.Alignment; import android.text.Layout.Alignment;
import android.text.StaticLayout; import android.text.StaticLayout;
import android.text.TextPaint; import android.text.TextPaint;
import android.util.AttributeSet; import android.util.AttributeSet;
import android.util.TypedValue; import android.util.Log;
import android.widget.TextView; import android.widget.TextView;
/** /**
@ -163,7 +164,9 @@ public class AutoResizeTextView extends TextView {
@Override @Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) { protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
if (changed || needsResize) { if (changed || needsResize) {
resizeText(right - left, bottom - top, getText()); int widthLimit = (right - left) - getCompoundPaddingLeft() - getCompoundPaddingRight();
int heightLimit = (bottom - top) - getCompoundPaddingBottom() - getCompoundPaddingTop();
resizeText(widthLimit, heightLimit, getText());
} }
super.onLayout(changed, left, top, right, bottom); super.onLayout(changed, left, top, right, bottom);
} }
@ -175,7 +178,7 @@ public class AutoResizeTextView extends TextView {
resizeText(getText()); resizeText(getText());
} }
public void resizeText(final CharSequence text) { private void resizeText(final CharSequence text) {
int heightLimit = getHeight() - getPaddingBottom() - getPaddingTop(); int heightLimit = getHeight() - getPaddingBottom() - getPaddingTop();
int widthLimit = getWidth() - getPaddingLeft() - getPaddingRight(); int widthLimit = getWidth() - getPaddingLeft() - getPaddingRight();
resizeText(widthLimit, heightLimit, text); resizeText(widthLimit, heightLimit, text);
@ -188,7 +191,8 @@ public class AutoResizeTextView extends TextView {
* @param height * @param height
* @param text * @param text
*/ */
public void resizeText(int width, int height, final CharSequence text) { private void resizeText(int width, int height, CharSequence text) {
Log.d(this.getClass().getName(), "Resizing: w=" + width + ", h=" + height + ", text='" + text + "'");
// Do not resize if the view does not have dimensions or there is no text // Do not resize if the view does not have dimensions or there is no text
if (text == null || text.length() == 0 || height <= 0 || width <= 0) { if (text == null || text.length() == 0 || height <= 0 || width <= 0) {
@ -200,29 +204,46 @@ public class AutoResizeTextView extends TextView {
// Store the current text size // Store the current text size
float oldTextSize = textPaint.getTextSize(); float oldTextSize = textPaint.getTextSize();
Log.d(this.getClass().getName(), "Old text size: " + oldTextSize);
// If there is a max text size set, use the lesser of that and the default text size // If there is a max text size set, use the lesser of that and the default text size
float newTextSize = 100; float newTextSize = 100;
// Get the required text height int newTextHeight;
int newTextHeight = getTextRect(text, textPaint, width, newTextSize);
if (newTextHeight > height) { if (text instanceof Editable) {
// Until we either fit within our text view or we had reached our min text size, incrementally try smaller sizes ((Editable) text).append("|");
while (newTextHeight > height) { }
if (newTextSize <= minTextSize) {
break; try {
// Get the required text height
newTextHeight = getTextRect(text, textPaint, width, newTextSize);
logDimensions(newTextSize, newTextHeight);
if (newTextHeight > height) {
// Until we either fit within our text view or we had reached our min text size, incrementally try smaller sizes
while (newTextHeight > height) {
if (newTextSize <= minTextSize) {
break;
}
newTextSize = Math.max(newTextSize - 2, minTextSize);
newTextHeight = getTextRect(text, textPaint, width, newTextSize);
logDimensions(newTextSize, newTextHeight);
}
} else {
while (newTextHeight < height) {
if (newTextSize <= minTextSize) {
break;
}
newTextSize = Math.max(newTextSize + 2, minTextSize);
newTextHeight = getTextRect(text, textPaint, width, newTextSize);
logDimensions(newTextSize, newTextHeight);
} }
newTextSize = Math.max(newTextSize - 2, minTextSize);
newTextHeight = getTextRect(text, textPaint, width, newTextSize);
} }
} else { } finally {
while (newTextHeight < height) { if (text instanceof Editable) {
if (newTextSize <= minTextSize) { ((Editable) text).delete(text.length() - 1, text.length());
break;
}
newTextSize = Math.max(newTextSize + 2, minTextSize);
newTextHeight = getTextRect(text, textPaint, width, newTextSize);
} }
} }
@ -259,6 +280,10 @@ public class AutoResizeTextView extends TextView {
needsResize = false; needsResize = false;
} }
private void logDimensions(float newTextSize, int newTextHeight) {
Log.d(this.getClass().getName(), "Nex text size: " + newTextSize + ", new text height: " + newTextHeight);
}
// Set the text size of the text paint object and use a static layout to render text off screen before measuring // Set the text size of the text paint object and use a static layout to render text off screen before measuring
private int getTextRect(CharSequence source, TextPaint paint, int width, float textSize) { private int getTextRect(CharSequence source, TextPaint paint, int width, float textSize) {
// Update the text paint object // Update the text paint object