1 files changed, 316 insertions, 0 deletions
diff --git a/colorPicker/src/main/java/com/jaredrummler/android/colorpicker/ColorPanelView.java b/colorPicker/src/main/java/com/jaredrummler/android/colorpicker/ColorPanelView.java
new file mode 100644
index 000000000..ad047682d
--- /dev/null
+++ b/colorPicker/src/main/java/com/jaredrummler/android/colorpicker/ColorPanelView.java
@@ -0,0 +1,316 @@
+/*
+ * Copyright (C) 2017 Jared Rummler
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.jaredrummler.android.colorpicker;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Bitmap;
+import android.graphics.BitmapShader;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.graphics.Shader;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.os.Bundle;
+import android.os.Parcelable;
+import android.util.AttributeSet;
+import android.util.TypedValue;
+import android.view.Gravity;
+import android.view.View;
+import android.widget.Toast;
+
+import androidx.annotation.ColorInt;
+import androidx.core.view.GravityCompat;
+import androidx.core.view.ViewCompat;
+
+import java.util.Locale;
+
+/**
+ * This class draws a panel which which will be filled with a color which can be set. It can be used to show the
+ * currently selected color which you will get from the {@link ColorPickerView}.
+ */
+public class ColorPanelView extends View {
+
+    private final static int DEFAULT_BORDER_COLOR = 0xFF6E6E6E;
+
+    private Drawable alphaPattern;
+    private Paint borderPaint;
+    private Paint colorPaint;
+    private Paint alphaPaint;
+    private Paint originalPaint;
+    private Rect drawingRect;
+    private Rect colorRect;
+    private RectF centerRect = new RectF();
+    private boolean showOldColor;
+
+    /* The width in pixels of the border surrounding the color panel. */
+    private int borderWidthPx;
+    private int borderColor = DEFAULT_BORDER_COLOR;
+    private int color = Color.BLACK;
+    private int shape;
+
+    public ColorPanelView(Context context) {
+        this(context, null);
+    }
+
+    public ColorPanelView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public ColorPanelView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        init(context, attrs);
+    }
+
+    @Override
+    public Parcelable onSaveInstanceState() {
+        Bundle state = new Bundle();
+        state.putParcelable("instanceState", super.onSaveInstanceState());
+        state.putInt("color", color);
+        return state;
+    }
+
+    @Override
+    public void onRestoreInstanceState(Parcelable state) {
+        if (state instanceof Bundle) {
+            Bundle bundle = (Bundle) state;
+            color = bundle.getInt("color");
+            state = bundle.getParcelable("instanceState");
+        }
+        super.onRestoreInstanceState(state);
+    }
+
+    private void init(Context context, AttributeSet attrs) {
+        TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.ColorPanelView);
+        shape = a.getInt(R.styleable.ColorPanelView_cpv_colorShape, ColorShape.CIRCLE);
+        showOldColor = a.getBoolean(R.styleable.ColorPanelView_cpv_showOldColor, false);
+        if (showOldColor && shape != ColorShape.CIRCLE) {
+            throw new IllegalStateException("Color preview is only available in circle mode");
+        }
+        borderColor = a.getColor(R.styleable.ColorPanelView_cpv_borderColor, DEFAULT_BORDER_COLOR);
+        a.recycle();
+        if (borderColor == DEFAULT_BORDER_COLOR) {
+            // If no specific border color has been set we take the default secondary text color as border/slider color.
+            // Thus it will adopt to theme changes automatically.
+            final TypedValue value = new TypedValue();
+            TypedArray typedArray =
+                    context.obtainStyledAttributes(value.data, new int[]{android.R.attr.textColorSecondary});
+            borderColor = typedArray.getColor(0, borderColor);
+            typedArray.recycle();
+        }
+        borderWidthPx = DrawingUtils.dpToPx(context, 1);
+        borderPaint = new Paint();
+        borderPaint.setAntiAlias(true);
+        colorPaint = new Paint();
+        colorPaint.setAntiAlias(true);
+        if (showOldColor) {
+            originalPaint = new Paint();
+        }
+        if (shape == ColorShape.CIRCLE) {
+            Bitmap bitmap = ((BitmapDrawable) context.getResources().getDrawable(R.drawable.cpv_alpha)).getBitmap();
+            alphaPaint = new Paint();
+            alphaPaint.setAntiAlias(true);
+            BitmapShader shader = new BitmapShader(bitmap, Shader.TileMode.REPEAT, Shader.TileMode.REPEAT);
+            alphaPaint.setShader(shader);
+        }
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        borderPaint.setColor(borderColor);
+        colorPaint.setColor(color);
+        if (shape == ColorShape.SQUARE) {
+            if (borderWidthPx > 0) {
+                canvas.drawRect(drawingRect, borderPaint);
+            }
+            if (alphaPattern != null) {
+                alphaPattern.draw(canvas);
+            }
+            canvas.drawRect(colorRect, colorPaint);
+        } else if (shape == ColorShape.CIRCLE) {
+            final int outerRadius = getMeasuredWidth() / 2;
+            if (borderWidthPx > 0) {
+                canvas.drawCircle(getMeasuredWidth() / 2, getMeasuredHeight() / 2, outerRadius, borderPaint);
+            }
+            if (Color.alpha(color) < 255) {
+                canvas.drawCircle(getMeasuredWidth() / 2, getMeasuredHeight() / 2, outerRadius - borderWidthPx, alphaPaint);
+            }
+            if (showOldColor) {
+                canvas.drawArc(centerRect, 90, 180, true, originalPaint);
+                canvas.drawArc(centerRect, 270, 180, true, colorPaint);
+            } else {
+                canvas.drawCircle(getMeasuredWidth() / 2, getMeasuredHeight() / 2, outerRadius - borderWidthPx, colorPaint);
+            }
+        }
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        if (shape == ColorShape.SQUARE) {
+            int width = MeasureSpec.getSize(widthMeasureSpec);
+            int height = MeasureSpec.getSize(heightMeasureSpec);
+            setMeasuredDimension(width, height);
+        } else if (shape == ColorShape.CIRCLE) {
+            super.onMeasure(widthMeasureSpec, widthMeasureSpec);
+            setMeasuredDimension(getMeasuredWidth(), getMeasuredWidth());
+        } else {
+            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+        }
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+        super.onSizeChanged(w, h, oldw, oldh);
+        if (shape == ColorShape.SQUARE || showOldColor) {
+            drawingRect = new Rect();
+            drawingRect.left = getPaddingLeft();
+            drawingRect.right = w - getPaddingRight();
+            drawingRect.top = getPaddingTop();
+            drawingRect.bottom = h - getPaddingBottom();
+            if (showOldColor) {
+                setUpCenterRect();
+            } else {
+                setUpColorRect();
+            }
+        }
+    }
+
+    private void setUpCenterRect() {
+        final Rect dRect = drawingRect;
+        int left = dRect.left + borderWidthPx;
+        int top = dRect.top + borderWidthPx;
+        int bottom = dRect.bottom - borderWidthPx;
+        int right = dRect.right - borderWidthPx;
+        centerRect = new RectF(left, top, right, bottom);
+    }
+
+    private void setUpColorRect() {
+        final Rect dRect = drawingRect;
+        int left = dRect.left + borderWidthPx;
+        int top = dRect.top + borderWidthPx;
+        int bottom = dRect.bottom - borderWidthPx;
+        int right = dRect.right - borderWidthPx;
+        colorRect = new Rect(left, top, right, bottom);
+        alphaPattern = new AlphaPatternDrawable(DrawingUtils.dpToPx(getContext(), 4));
+        alphaPattern.setBounds(Math.round(colorRect.left), Math.round(colorRect.top), Math.round(colorRect.right),
+                Math.round(colorRect.bottom));
+    }
+
+    /**
+     * Get the color currently show by this view.
+     *
+     * @return the color value
+     */
+    public int getColor() {
+        return color;
+    }
+
+    /**
+     * Set the color that should be shown by this view.
+     *
+     * @param color the color value
+     */
+    public void setColor(int color) {
+        this.color = color;
+        invalidate();
+    }
+
+    /**
+     * Set the original color. This is only used for previewing colors.
+     *
+     * @param color The original color
+     */
+    public void setOriginalColor(@ColorInt int color) {
+        if (originalPaint != null) {
+            originalPaint.setColor(color);
+        }
+    }
+
+    /**
+     * @return the color of the border surrounding the panel.
+     */
+    public int getBorderColor() {
+        return borderColor;
+    }
+
+    /**
+     * Set the color of the border surrounding the panel.
+     *
+     * @param color the color value
+     */
+    public void setBorderColor(int color) {
+        borderColor = color;
+        invalidate();
+    }
+
+    /**
+     * Get the shape
+     *
+     * @return Either {@link ColorShape#SQUARE} or {@link ColorShape#CIRCLE}.
+     */
+    @ColorShape
+    public int getShape() {
+        return shape;
+    }
+
+    /**
+     * Set the shape.
+     *
+     * @param shape Either {@link ColorShape#SQUARE} or {@link ColorShape#CIRCLE}.
+     */
+    public void setShape(@ColorShape int shape) {
+        this.shape = shape;
+        invalidate();
+    }
+
+    /**
+     * Show a toast message with the hex color code below the view.
+     */
+    public void showHint() {
+        final int[] screenPos = new int[2];
+        final Rect displayFrame = new Rect();
+        getLocationOnScreen(screenPos);
+        getWindowVisibleDisplayFrame(displayFrame);
+        final Context context = getContext();
+        final int width = getWidth();
+        final int height = getHeight();
+        final int midy = screenPos[1] + height / 2;
+        int referenceX = screenPos[0] + width / 2;
+        if (ViewCompat.getLayoutDirection(this) == ViewCompat.LAYOUT_DIRECTION_LTR) {
+            final int screenWidth = context.getResources().getDisplayMetrics().widthPixels;
+            referenceX = screenWidth - referenceX; // mirror
+        }
+        StringBuilder hint = new StringBuilder("#");
+        if (Color.alpha(color) != 255) {
+            hint.append(Integer.toHexString(color).toUpperCase(Locale.ENGLISH));
+        } else {
+            hint.append(String.format("%06X", 0xFFFFFF & color).toUpperCase(Locale.ENGLISH));
+        }
+        Toast cheatSheet = Toast.makeText(context, hint.toString(), Toast.LENGTH_SHORT);
+        if (midy < displayFrame.height()) {
+            // Show along the top; follow action buttons
+            cheatSheet.setGravity(Gravity.TOP | GravityCompat.END, referenceX, screenPos[1] + height - displayFrame.top);
+        } else {
+            // Show along the bottom center
+            cheatSheet.setGravity(Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL, 0, height);
+        }
+        cheatSheet.show();
+    }
+}