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Cache Paints in drag buttons

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This commit is contained in:
Sergey Solovyev 2017-06-07 21:06:15 +02:00
parent 1ec5714174
commit 2c8e169363
9 changed files with 495 additions and 320 deletions
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2
app/src/main/java/org/solovyev/android/calculator/BaseActivity.java
View File

@ -96,7 +96,7 @@ public abstract class BaseActivity extends AppCompatActivity implements SharedPr
if (view instanceof TextView) {
final TextView textView = (TextView) view;
final Typeface oldTypeface = textView.getTypeface();
if (oldTypeface == newTypeface) {
if (oldTypeface != null && oldTypeface.equals(newTypeface)) {
return;
}
final int style = oldTypeface != null ? oldTypeface.getStyle() : Typeface.NORMAL;

16
app/src/main/java/org/solovyev/android/calculator/keyboard/BaseKeyboardUi.java
View File

@ -1,5 +1,12 @@
package org.solovyev.android.calculator.keyboard;
import static android.content.res.Configuration.ORIENTATION_PORTRAIT;
import static android.view.HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING;
import static android.view.HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING;
import static android.view.HapticFeedbackConstants.KEYBOARD_TAP;
import static org.solovyev.android.calculator.App.cast;
import static org.solovyev.android.calculator.Preferences.Gui.Mode.simple;
import android.app.Activity;
import android.app.Application;
import android.content.Context;
@ -40,13 +47,6 @@ import javax.inject.Inject;
import dagger.Lazy;
import static android.content.res.Configuration.ORIENTATION_PORTRAIT;
import static android.view.HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING;
import static android.view.HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING;
import static android.view.HapticFeedbackConstants.KEYBOARD_TAP;
import static org.solovyev.android.calculator.App.cast;
import static org.solovyev.android.calculator.Preferences.Gui.Mode.simple;
public abstract class BaseKeyboardUi implements SharedPreferences.OnSharedPreferenceChangeListener, View.OnClickListener {
public static float getTextScale(@NonNull Context context) {
@ -212,7 +212,7 @@ public abstract class BaseKeyboardUi implements SharedPreferences.OnSharedPrefer
private static class AdjusterHelper implements Adjuster.Helper<DirectionDragImageButton> {
public static AdjusterHelper instance = new AdjusterHelper();
public static final AdjusterHelper instance = new AdjusterHelper();
@Override
public void apply(@NonNull DirectionDragImageButton view, float textSize) {

6
app/src/main/java/org/solovyev/android/views/Adjuster.java
View File

@ -1,5 +1,7 @@
package org.solovyev.android.views;
import static android.graphics.Matrix.MSCALE_Y;
import android.graphics.drawable.Drawable;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
@ -11,13 +13,11 @@ import android.view.ViewTreeObserver;
import android.widget.ImageView;
import android.widget.TextView;
import static android.graphics.Matrix.MSCALE_Y;
public class Adjuster {
private static final float[] MATRIX = new float[9];
@NonNull
private static Helper<TextView> textViewHelper = new Helper<TextView>() {
private static final Helper<TextView> textViewHelper = new Helper<TextView>() {
@Override
public void apply(@NonNull TextView view, float textSize) {
view.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);

44
dragbutton/src/main/java/org/solovyev/android/views/dragbutton/DirectionDragButton.java
View File

@ -2,22 +2,14 @@ package org.solovyev.android.views.dragbutton;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Typeface;
import android.support.annotation.ColorInt;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.text.TextPaint;
import android.util.AttributeSet;
import static android.graphics.Color.BLACK;
import static android.util.TypedValue.COMPLEX_UNIT_DIP;
import static android.util.TypedValue.applyDimension;
import static org.solovyev.android.views.dragbutton.DirectionTextView.SHADOW_RADIUS_DPS;
public class DirectionDragButton extends DragButton implements DirectionDragView {
private final DirectionTextView textView = new DirectionTextView();
@NonNull
private final TextPaint baseTextPaint = new TextPaint();
private boolean highContrast;
public DirectionDragButton(Context context) {
super(context);
@ -41,20 +33,11 @@ public class DirectionDragButton extends DragButton implements DirectionDragView
private void init(@Nullable AttributeSet attrs) {
textView.init(this, attrs);
baseTextPaint.set(getPaint());
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
final TextPaint paint = getPaint();
if (baseTextPaint.getTextSize() != paint.getTextSize() ||
baseTextPaint.getTypeface() != paint.getTypeface() ||
baseTextPaint.getColor() != paint.getColor() ||
baseTextPaint.getAlpha() != paint.getAlpha()) {
baseTextPaint.set(paint);
textView.setBaseTextPaint(paint);
}
textView.draw(canvas);
}
@ -69,9 +52,21 @@ public class DirectionDragButton extends DragButton implements DirectionDragView
return this;
}
@Override
public void setTypeface(Typeface tf, int style) {
super.setTypeface(tf, style);
textView.setTypeface(getPaint().getTypeface());
}
@Override
public void setTextSize(int unit, float size) {
super.setTextSize(unit, size);
textView.setTextSize(getPaint().getTextSize());
}
@Override
@NonNull
public DirectionTextView.Text getText(@NonNull DragDirection direction) {
public DirectionText getText(@NonNull DragDirection direction) {
return textView.getText(direction);
}
@ -93,15 +88,6 @@ public class DirectionDragButton extends DragButton implements DirectionDragView
@Override
public void setHighContrast(boolean highContrast) {
if(this.highContrast == highContrast) {
return;
}
this.highContrast = highContrast;
this.textView.setHighContrast(highContrast);
if (highContrast && DirectionTextView.needsShadow(getCurrentTextColor())) {
setShadowLayer(applyDimension(COMPLEX_UNIT_DIP, SHADOW_RADIUS_DPS, getResources().getDisplayMetrics()), 0, 0, BLACK);
} else {
setShadowLayer(0, 0, 0, BLACK);
}
textView.setHighContrast(highContrast);
}
}

24
dragbutton/src/main/java/org/solovyev/android/views/dragbutton/DirectionDragImageButton.java
View File

@ -5,13 +5,11 @@ import android.graphics.Canvas;
import android.graphics.Typeface;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.text.TextPaint;
import android.util.AttributeSet;
import android.widget.TextView;
public class DirectionDragImageButton extends DragImageButton implements DirectionDragView {
private final DirectionTextView textView = new DirectionTextView();
private final TextPaint baseTextPaint = new TextPaint();
public DirectionDragImageButton(Context context) {
super(context);
@ -35,8 +33,7 @@ public class DirectionDragImageButton extends DragImageButton implements Directi
private void init(@Nullable AttributeSet attrs) {
final TextView view = new TextView(getContext(), attrs);
baseTextPaint.set(view.getPaint());
textView.init(this, attrs, baseTextPaint);
textView.init(this, attrs, view.getPaint());
}
@Override
@ -46,29 +43,24 @@ public class DirectionDragImageButton extends DragImageButton implements Directi
}
@NonNull
public DirectionTextView.Text getText(@NonNull DragDirection direction) {
public DirectionText getText(@NonNull DragDirection direction) {
return textView.getText(direction);
}
public void setTypeface(@NonNull Typeface newTypeface) {
final Typeface oldTypeface = baseTextPaint.getTypeface();
if (oldTypeface == newTypeface) {
return;
}
baseTextPaint.setTypeface(newTypeface);
textView.setBaseTextPaint(baseTextPaint);
public void setTypeface(@NonNull Typeface typeface) {
textView.setTypeface(typeface);
}
public void setTextSize(float textSizePxs) {
baseTextPaint.setTextSize(textSizePxs);
textView.setBaseTextPaint(baseTextPaint);
public void setTextSize(float textSize) {
textView.setTextSize(textSize);
}
public float getTextSize() {
return baseTextPaint.getTextSize();
return textView.getTextSize();
}
@Override
public void setHighContrast(boolean highContrast) {
textView.setHighContrast(highContrast);
}
}

2
dragbutton/src/main/java/org/solovyev/android/views/dragbutton/DirectionDragView.java
View File

@ -4,5 +4,5 @@ import android.support.annotation.NonNull;
public interface DirectionDragView extends DragView {
@NonNull
DirectionTextView.Text getText(@NonNull DragDirection direction);
DirectionText getText(@NonNull DragDirection direction);
}

200
dragbutton/src/main/java/org/solovyev/android/views/dragbutton/DirectionText.java Normal file
View File

@ -0,0 +1,200 @@
package org.solovyev.android.views.dragbutton;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.PointF;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import android.view.View;
public class DirectionText {
static final float DEF_SCALE = 0.4f;
private static final Rect TMP = new Rect();
@NonNull
private final DragDirection direction;
@NonNull
private final View view;
private final float minTextSize;
@NonNull
private final PointF offset = new PointF(Integer.MIN_VALUE, Integer.MIN_VALUE);
@NonNull
private final PaintCache paintCache;
@NonNull
private PaintCache.Entry entry;
@NonNull
private String value = "";
private boolean visible = true;
private int padding;
private float scale;
private float baseTextSize;
public DirectionText(@NonNull DragDirection direction, @NonNull View view,
float minTextSize) {
this.direction = direction;
this.view = view;
this.minTextSize = minTextSize;
this.paintCache = PaintCache.get();
}
public void init(@Nullable TypedArray array, float defScale,
int defColor, float defAlpha, int defPadding, @NonNull Typeface defTypeface,
float textSize) {
baseTextSize = textSize;
if (array != null) {
if (array.hasValue(direction.textAttr)) {
value = nullToEmpty(array.getString(direction.textAttr));
}
padding = array.getDimensionPixelSize(direction.paddingAttr, defPadding);
scale = array.getFloat(direction.scaleAttr, defScale);
} else {
value = "";
scale = defScale;
padding = defPadding;
}
final PaintCache.Spec spec = new PaintCache.Spec(defColor, defAlpha,
defTypeface, scaledTextSize(textSize, scale), false);
entry = paintCache.get(view.getContext(), spec);
}
@NonNull
private String nullToEmpty(@Nullable String s) {
return s == null ? "" : s;
}
private float scaledTextSize(float textSize, float scale) {
return Math.max(textSize * scale, minTextSize);
}
public void setVisible(boolean visible) {
if (this.visible == visible) {
return;
}
this.visible = visible;
invalidate(false);
}
private void invalidate(boolean remeasure) {
view.invalidate();
if (remeasure) {
offset.set(Integer.MIN_VALUE, Integer.MIN_VALUE);
}
}
public void setColor(int color) {
setColor(color, entry.spec.alpha);
}
private void setColor(int color, float alpha) {
if (entry.spec.color == color && entry.spec.alpha == alpha) {
return;
}
entry = paintCache.get(view.getContext(), entry.spec.color(color, alpha));
invalidate(false);
}
public void setAlpha(float alpha) {
setColor(entry.spec.color, alpha);
}
void setHighContrast(boolean highContrast) {
if (entry.spec.highContrast == highContrast) {
return;
}
entry = paintCache.get(view.getContext(), entry.spec.highContrast(highContrast));
invalidate(false);
}
public void setTypeface(@NonNull Typeface typeface) {
if (entry.spec.typeface.equals(typeface)) {
return;
}
entry = paintCache.get(view.getContext(), entry.spec.typeface(typeface));
invalidate(true);
}
void draw(@NonNull Canvas canvas) {
if (!hasValue()) {
return;
}
if (offset.x == Integer.MIN_VALUE || offset.y == Integer.MIN_VALUE) {
calculatePosition();
}
final int width = view.getWidth();
final int height = view.getHeight();
switch (direction) {
case up:
canvas.drawText(value, width + offset.x, offset.y, entry.paint);
break;
case down:
canvas.drawText(value, width + offset.x, height + offset.y, entry.paint);
break;
case left:
canvas.drawText(value, offset.x, height / 2 + offset.y, entry.paint);
break;
case right:
canvas.drawText(value, width + offset.x, height / 2 + offset.y, entry.paint);
break;
}
}
boolean hasValue() {
return visible && !TextUtils.isEmpty(value);
}
private void calculatePosition() {
TMP.setEmpty();
entry.paint.getTextBounds(value, 0, value.length(), TMP);
final int paddingLeft = padding;
final int paddingRight = padding;
final int paddingTop = padding;
final int paddingBottom = padding;
switch (direction) {
case up:
case down:
offset.x = -paddingLeft - TMP.width() - TMP.left;
if (direction == DragDirection.up) {
offset.y = paddingTop + entry.getFixedTextHeight(scaledTextSize(baseTextSize, DEF_SCALE));
} else {
offset.y = -paddingBottom;
}
break;
case left:
case right:
if (direction == DragDirection.left) {
offset.x = paddingLeft;
} else {
offset.x = -paddingRight - TMP.width();
}
offset.y = (paddingTop - paddingBottom) / 2 + entry.getFixedTextHeight(scaledTextSize(baseTextSize, DEF_SCALE)) / 2;
break;
}
}
@NonNull
public String getValue() {
return visible ? value : "";
}
public void setValue(@NonNull String value) {
if (TextUtils.equals(this.value, value)) {
return;
}
this.value = value;
invalidate(true);
}
public void setBaseTextSize(float baseTextSize) {
if (this.baseTextSize == baseTextSize) {
return;
}
this.baseTextSize = baseTextSize;
entry = paintCache.get(view.getContext(), entry.spec.textSize(scaledTextSize(baseTextSize, scale)));
invalidate(true);
}
}

300
dragbutton/src/main/java/org/solovyev/android/views/dragbutton/DirectionTextView.java
View File

@ -1,18 +1,13 @@
package org.solovyev.android.views.dragbutton;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.PointF;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.support.annotation.ColorInt;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.content.ContextCompat;
import android.support.v4.graphics.ColorUtils;
import android.text.TextPaint;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.View;
import android.widget.TextView;
@ -20,297 +15,84 @@ import android.widget.TextView;
import java.util.EnumMap;
import java.util.Map;
import static android.graphics.Color.BLACK;
import static android.util.TypedValue.COMPLEX_UNIT_DIP;
import static android.util.TypedValue.applyDimension;
class DirectionTextView {
public class DirectionTextView {
public static final float DEF_ALPHA = 0.4f;
public static final float DEF_SCALE = 0.4f;
public static final float SHADOW_RADIUS_DPS = 2;
static final float SHADOW_RADIUS_DPS = 2;
private static final float DEF_ALPHA = 0.4f;
@NonNull
private final Map<DragDirection, Text> texts = new EnumMap<>(DragDirection.class);
private final Map<DragDirection, DirectionText> texts = new EnumMap<>(DragDirection.class);
private float textSize;
private Typeface typeface;
public DirectionTextView() {
DirectionTextView() {
}
public void init(@NonNull TextView view, @Nullable AttributeSet attrs) {
init(view, attrs, view.getPaint());
}
public void setBaseTextPaint(@NonNull TextPaint baseTextPaint) {
for (Text text : texts.values()) {
text.initPaint(baseTextPaint);
}
}
public void init(@NonNull View view, @Nullable AttributeSet attrs, @NonNull TextPaint base) {
textSize = base.getTextSize();
typeface = base.getTypeface() == null ? Typeface.DEFAULT : base.getTypeface();
public void init(@NonNull View view, @Nullable AttributeSet attrs, @NonNull TextPaint baseTextPaint) {
final Context context = view.getContext();
final int defColor = baseTextPaint.getColor();
final int defPadding = context.getResources().getDimensionPixelSize(R.dimen.drag_direction_text_default_padding);
final float minTextSize = context.getResources().getDimensionPixelSize(R.dimen.drag_direction_text_min_size);
final Resources res = context.getResources();
if (attrs == null) {
final float minTextSize =
res.getDimensionPixelSize(R.dimen.drag_direction_text_min_size);
final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.DirectionText);
final float scale =
a.getFloat(R.styleable.DirectionText_directionTextScale, DirectionText.DEF_SCALE);
final float alpha = a.getFloat(R.styleable.DirectionText_directionTextAlpha, DEF_ALPHA);
final int color = a.getColor(R.styleable.DirectionText_directionTextColor, base.getColor());
final int padding = a.getDimensionPixelSize(R.styleable.DirectionText_directionTextPadding,
res.getDimensionPixelSize(R.dimen.drag_direction_text_default_padding));
for (DragDirection direction : DragDirection.values()) {
final Text text = new Text(direction, view, minTextSize);
text.init(baseTextPaint, null, DEF_SCALE, defColor, DEF_ALPHA, defPadding);
final DirectionText text = new DirectionText(direction, view, minTextSize);
text.init(a, scale, color, alpha, padding, typeface, textSize);
texts.put(direction, text);
}
return;
}
final TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.DirectionText);
final float scale = array.getFloat(R.styleable.DirectionText_directionTextScale, DEF_SCALE);
final float alpha = array.getFloat(R.styleable.DirectionText_directionTextAlpha, DEF_ALPHA);
final int color = array.getColor(R.styleable.DirectionText_directionTextColor, defColor);
final int padding = array.getDimensionPixelSize(R.styleable.DirectionText_directionTextPadding, defPadding);
for (DragDirection direction : DragDirection.values()) {
final Text text = new Text(direction, view, minTextSize);
text.init(baseTextPaint, array, scale, color, alpha, padding);
texts.put(direction, text);
}
array.recycle();
a.recycle();
}
public void draw(@NonNull Canvas canvas) {
for (Text text : texts.values()) {
void draw(@NonNull Canvas canvas) {
for (DirectionText text : texts.values()) {
text.draw(canvas);
}
}
@NonNull
public Text getText(@NonNull DragDirection direction) {
public DirectionText getText(@NonNull DragDirection direction) {
return texts.get(direction);
}
public void setHighContrast(boolean highContrast) {
for (Text text : texts.values()) {
void setHighContrast(boolean highContrast) {
for (DirectionText text : texts.values()) {
text.setHighContrast(highContrast);
}
}
public static class Text {
public final Rect bounds = new Rect();
@NonNull
private final TextPaint paint = new TextPaint();
@NonNull
private final DragDirection direction;
@NonNull
private final View view;
private final float minTextSize;
@NonNull
private final PointF offset = new PointF(0, 0);
private float fixedTextHeight = 0;
@NonNull
private String value = "";
private float scale;
private int color;
private int contrastColor;
private float alpha;
private boolean visible = true;
private boolean highContrast;
private int padding;
public Text(@NonNull DragDirection direction, @NonNull View view, float minTextSize) {
this.direction = direction;
this.view = view;
this.minTextSize = minTextSize;
}
public void init(@NonNull TextPaint base, @Nullable TypedArray array, float defScale, int defColor, float defAlpha, int defPadding) {
if (array != null) {
if (array.hasValue(direction.textAttr)) {
value = nullToEmpty(array.getString(direction.textAttr));
}
padding = array.getDimensionPixelSize(direction.paddingAttr, defPadding);
scale = array.getFloat(direction.scaleAttr, defScale);
} else {
value = "";
scale = defScale;
padding = defPadding;
}
alpha = defAlpha;
color = defColor;
contrastColor = makeContrastColor(color);
initPaint(base);
}
@NonNull
private String nullToEmpty(@Nullable String s) {
return s == null ? "" : s;
}
private int makeContrastColor(int color) {
final int colorRes = isLightColor(color) ? R.color.drag_button_text : R.color.drag_text_inverse;
return ContextCompat.getColor(view.getContext(), colorRes);
}
public void initPaint(@NonNull TextPaint base) {
paint.set(base);
paint.setColor(color);
paint.setAlpha(intAlpha());
final Typeface typeface = base.getTypeface();
if (typeface != null && typeface.getStyle() != Typeface.NORMAL) {
paint.setTypeface(Typeface.create(typeface, Typeface.NORMAL));
}
// pre-calculate fixed height
paint.setTextSize(Math.max(base.getTextSize() * DEF_SCALE, minTextSize));
paint.getTextBounds("|", 0, 1, bounds);
fixedTextHeight = bounds.height();
// set real text size value
paint.setTextSize(Math.max(base.getTextSize() * scale, minTextSize));
initPaintShadow();
invalidate(true);
}
private void initPaintShadow() {
if (highContrast && needsShadow(color)) {
paint.setShadowLayer(applyDimension(COMPLEX_UNIT_DIP, SHADOW_RADIUS_DPS, view.getResources().getDisplayMetrics()), 0, 0, BLACK);
} else {
paint.setShadowLayer(0, 0, 0, BLACK);
}
}
private int intAlpha() {
return (int) (255 * alpha);
}
public void setVisible(boolean visible) {
if (this.visible == visible) {
public void setTypeface(@NonNull Typeface typeface) {
if(this.typeface == typeface) {
return;
}
this.visible = visible;
invalidate(false);
for (DirectionText text : texts.values()) {
text.setTypeface(typeface);
}
}
public void setColor(int color) {
setColor(color, alpha);
public float getTextSize() {
return textSize;
}
public void setAlpha(float alpha) {
setColor(color, alpha);
}
public void setHighContrast(boolean highContrast) {
if (this.highContrast == highContrast) {
public void setTextSize(float textSize) {
if (this.textSize == textSize) {
return;
}
this.highContrast = highContrast;
initPaintShadow();
invalidate(false);
this.textSize = textSize;
for (DirectionText text : texts.values()) {
text.setBaseTextSize(textSize);
}
public void setColor(int color, float alpha) {
if (this.color == color && this.alpha == alpha) {
return;
}
this.color = color;
this.contrastColor = makeContrastColor(color);
this.alpha = alpha;
paint.setColor(color);
paint.setAlpha(intAlpha());
initPaintShadow();
invalidate(false);
}
private void invalidate(boolean remeasure) {
view.invalidate();
if (remeasure) {
offset.set(0, 0);
}
}
public void draw(@NonNull Canvas canvas) {
if (!hasValue()) {
return;
}
if (offset.x == 0 && offset.y == 0) {
calculatePosition();
}
if (highContrast) {
paint.setColor(contrastColor);
paint.setAlpha(255);
}
final int width = view.getWidth();
final int height = view.getHeight();
switch (direction) {
case up:
canvas.drawText(value, width + offset.x, offset.y, paint);
break;
case down:
canvas.drawText(value, width + offset.x, height + offset.y, paint);
break;
case left:
canvas.drawText(value, offset.x, height / 2 + offset.y, paint);
break;
case right:
canvas.drawText(value, width + offset.x, height / 2 + offset.y, paint);
break;
}
if (highContrast) {
paint.setColor(color);
paint.setAlpha(intAlpha());
}
}
private void calculatePosition() {
paint.getTextBounds(value, 0, value.length(), bounds);
final int paddingLeft = padding;
final int paddingRight = padding;
final int paddingTop = padding;
final int paddingBottom = padding;
switch (direction) {
case up:
case down:
offset.x = -paddingLeft - bounds.width() - bounds.left;
if (direction == DragDirection.up) {
offset.y = paddingTop + fixedTextHeight;
} else {
offset.y = -paddingBottom;
}
break;
case left:
case right:
if (direction == DragDirection.left) {
offset.x = paddingLeft;
} else {
offset.x = -paddingRight - bounds.width();
}
offset.y = (paddingTop - paddingBottom) / 2 + fixedTextHeight / 2;
break;
}
}
@NonNull
public String getValue() {
return visible ? value : "";
}
public void setValue(@NonNull String value) {
if (TextUtils.equals(this.value, value)) {
return;
}
this.value = value;
invalidate(true);
}
public boolean hasValue() {
return visible && !TextUtils.isEmpty(value);
}
}
private static boolean isLightColor(@ColorInt int color) {
return ColorUtils.calculateLuminance(color) > 0.5f;
}
public static boolean needsShadow(@ColorInt int color) {
return isLightColor(color);
}
}

215
dragbutton/src/main/java/org/solovyev/android/views/dragbutton/PaintCache.java Normal file
View File

@ -0,0 +1,215 @@
package org.solovyev.android.views.dragbutton;
import static android.graphics.Color.BLACK;
import static android.util.TypedValue.COMPLEX_UNIT_DIP;
import static android.util.TypedValue.applyDimension;
import static org.solovyev.android.views.dragbutton.DirectionTextView.SHADOW_RADIUS_DPS;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.support.annotation.ColorInt;
import android.support.annotation.NonNull;
import android.support.v4.content.ContextCompat;
import android.support.v4.graphics.ColorUtils;
import android.util.Log;
import java.util.HashMap;
import java.util.Map;
class PaintCache {
@NonNull
private static final Rect TMP = new Rect();
private static final String TAG = "PaintCache";
@NonNull
private static final PaintCache INSTANCE = new PaintCache();
static class Entry {
@NonNull
public final Spec spec;
@NonNull
public final Paint paint;
private float lastTextSize;
private float fixedTextHeight;
Entry(@NonNull Spec spec, @NonNull Paint paint) {
this.spec = spec;
this.paint = paint;
}
float getFixedTextHeight(float textSize) {
if (lastTextSize == textSize) {
return fixedTextHeight;
}
if (lastTextSize != 0) {
Log.d(TAG, "Remeasuring text for size: " + textSize);
}
final float oldTextSize = paint.getTextSize();
paint.setTextSize(textSize);
TMP.setEmpty();
paint.getTextBounds("|", 0, 1, TMP);
paint.setTextSize(oldTextSize);
lastTextSize = textSize;
fixedTextHeight = TMP.height();
return fixedTextHeight;
}
}
static class Spec {
@ColorInt
public final int color;
public final float alpha;
@NonNull
public final Typeface typeface;
public final float textSize;
public final boolean highContrast;
Spec(int color, float alpha, @NonNull Typeface typeface,
float textSize,
boolean highContrast) {
this.color = color;
this.alpha = alpha;
this.typeface = typeface;
this.textSize = textSize;
this.highContrast = highContrast;
}
private int contrastColor(@NonNull Context context) {
final int colorRes =
isLightColor(color) ? R.color.drag_button_text : R.color.drag_text_inverse;
return ContextCompat.getColor(context, colorRes);
}
private static boolean isLightColor(@ColorInt int color) {
return ColorUtils.calculateLuminance(color) > 0.5f;
}
private int intAlpha() {
return (int) (255 * alpha);
}
private boolean needsShadow() {
return needsShadow(color);
}
public static boolean needsShadow(@ColorInt int color) {
return isLightColor(color);
}
@Override
public int hashCode() {
int result = color;
result = 31 * result + (alpha != +0.0f ? Float.floatToIntBits(alpha) : 0);
result = 31 * result + typeface.hashCode();
result = 31 * result + (textSize != +0.0f ? Float.floatToIntBits(textSize) : 0);
result = 31 * result + (highContrast ? 1 : 0);
return result;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
final Spec spec = (Spec) o;
if (color != spec.color) return false;
if (Float.compare(spec.alpha, alpha) != 0) return false;
if (Float.compare(spec.textSize, textSize) != 0) return false;
if (highContrast != spec.highContrast) return false;
return typeface.equals(spec.typeface);
}
@NonNull
public Spec highContrast(boolean highContrast) {
return new Spec(color, alpha, typeface, textSize, highContrast);
}
@NonNull
public Spec color(int color, float alpha) {
return new Spec(color, alpha, typeface, textSize, highContrast);
}
@NonNull
public Spec typeface(@NonNull Typeface typeface) {
return new Spec(color, alpha, typeface, textSize, highContrast);
}
@NonNull
public Spec textSize(float textSize) {
return new Spec(color, alpha, typeface, textSize, highContrast);
}
@Override
public String toString() {
return "Spec{" +
"color=" + color +
", alpha=" + alpha +
", typeface=" + System.identityHashCode(typeface) +
", textSize=" + textSize +
", highContrast=" + highContrast +
'}';
}
}
private float shadowRadius;
@NonNull
private final Map<Spec, Entry> map = new HashMap<>();
private void lazyLoad(@NonNull Context context) {
if (shadowRadius != 0) {
return;
}
final Resources res = context.getResources();
shadowRadius = applyDimension(COMPLEX_UNIT_DIP, SHADOW_RADIUS_DPS,
res.getDisplayMetrics());
}
@NonNull
public static PaintCache get() {
return INSTANCE;
}
@NonNull
public Entry get(@NonNull Context context, @NonNull Spec spec) {
lazyLoad(context);
Entry entry = map.get(spec);
if (entry == null) {
entry = new Entry(spec, makePaint(context, spec));
map.put(spec, entry);
} else {
Log.d(TAG, "Reusing paint for spec: " + spec);
}
return entry;
}
@NonNull
private Paint makePaint(@NonNull Context context, @NonNull Spec spec) {
Log.d(TAG, "Creating new paint for spec: " + spec);
final Paint paint = new Paint();
paint.setAntiAlias(true);
if (spec.highContrast) {
paint.setColor(spec.contrastColor(context));
paint.setAlpha(255);
} else {
paint.setColor(spec.color);
paint.setAlpha(spec.intAlpha());
}
if (spec.typeface.getStyle() != Typeface.NORMAL) {
paint.setTypeface(Typeface.create(spec.typeface, Typeface.NORMAL));
} else {
paint.setTypeface(spec.typeface);
}
paint.setTextSize(spec.textSize);
if (spec.highContrast && spec.needsShadow()) {
paint.setShadowLayer(shadowRadius, 0, 0, BLACK);
} else {
paint.setShadowLayer(0, 0, 0, BLACK);
}
return paint;
}
}