Plotter
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serso
405
app/src/main/java/uz/shift/colorpicker/LineColorPicker.java
Normal file
405
app/src/main/java/uz/shift/colorpicker/LineColorPicker.java
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package uz.shift.colorpicker;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.Paint.Style;
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import android.graphics.Rect;
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import android.os.Parcel;
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import android.os.Parcelable;
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import android.util.AttributeSet;
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import android.view.MotionEvent;
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import android.view.View;
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import org.solovyev.android.calculator.R;
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public class LineColorPicker extends View {
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public static final int HORIZONTAL = 0;
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public static final int VERTICAL = 1;
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int[] colors = isInEditMode() ? Palette.DEFAULT : new int[1];
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// indicate if nothing selected
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boolean isColorSelected = false;
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private Paint paint;
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private Rect rect = new Rect();
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private int selectedColor = colors[0];
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private OnColorChangedListener onColorChanged;
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private int cellSize;
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private int mOrientation = HORIZONTAL;
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private boolean isClick = false;
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private int screenW;
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private int screenH;
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public LineColorPicker(Context context, AttributeSet attrs) {
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super(context, attrs);
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paint = new Paint();
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paint.setStyle(Style.FILL);
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final TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.LineColorPicker, 0, 0);
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try {
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mOrientation = a.getInteger(R.styleable.LineColorPicker_lcp_orientation, HORIZONTAL);
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if (!isInEditMode()) {
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final int colorsArrayResId = a.getResourceId(R.styleable.LineColorPicker_lcp_colors, -1);
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if (colorsArrayResId > 0) {
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final int[] colors = context.getResources().getIntArray(colorsArrayResId);
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setColors(colors);
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}
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}
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final int selected = a.getInteger(R.styleable.LineColorPicker_lcp_selectedColorIndex, -1);
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if (selected != -1) {
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final int[] currentColors = getColors();
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final int currentColorsLength = currentColors != null ? currentColors.length : 0;
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if (selected < currentColorsLength) {
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setSelectedColorPosition(selected);
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}
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}
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} finally {
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a.recycle();
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}
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}
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@Override
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protected void onDraw(Canvas canvas) {
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super.onDraw(canvas);
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if (mOrientation == HORIZONTAL) {
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drawHorizontalPicker(canvas);
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} else {
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drawVerticalPicker(canvas);
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}
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}
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private void drawVerticalPicker(Canvas canvas) {
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rect.left = 0;
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rect.top = 0;
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rect.right = getWidth();
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rect.bottom = 0;
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// 8%
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int margin = Math.round(getWidth() * 0.08f);
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for (int i = 0; i < colors.length; i++) {
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paint.setColor(colors[i]);
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rect.top = rect.bottom;
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rect.bottom += cellSize;
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if (isColorSelected && colors[i] == selectedColor) {
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rect.left = 0;
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rect.right = getWidth();
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} else {
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rect.left = margin;
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rect.right = getWidth() - margin;
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}
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canvas.drawRect(rect, paint);
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}
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}
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private void drawHorizontalPicker(Canvas canvas) {
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rect.left = 0;
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rect.top = 0;
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rect.right = 0;
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rect.bottom = getHeight();
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// 8%
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int margin = Math.round(getHeight() * 0.08f);
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for (int i = 0; i < colors.length; i++) {
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paint.setColor(colors[i]);
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rect.left = rect.right;
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rect.right += cellSize;
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if (isColorSelected && colors[i] == selectedColor) {
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rect.top = 0;
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rect.bottom = getHeight();
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} else {
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rect.top = margin;
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rect.bottom = getHeight() - margin;
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}
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canvas.drawRect(rect, paint);
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}
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}
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private void onColorChanged(int color) {
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if (onColorChanged != null) {
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onColorChanged.onColorChanged(color);
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}
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}
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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int actionId = event.getAction();
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int newColor;
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switch (actionId) {
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case MotionEvent.ACTION_DOWN:
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isClick = true;
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break;
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case MotionEvent.ACTION_UP:
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newColor = getColorAtXY(event.getX(), event.getY());
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setSelectedColor(newColor);
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if (isClick) {
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performClick();
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}
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break;
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case MotionEvent.ACTION_MOVE:
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newColor = getColorAtXY(event.getX(), event.getY());
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setSelectedColor(newColor);
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break;
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case MotionEvent.ACTION_CANCEL:
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isClick = false;
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break;
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case MotionEvent.ACTION_OUTSIDE:
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isClick = false;
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break;
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default:
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break;
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}
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return true;
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}
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/**
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* Return color at x,y coordinate of view.
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*/
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private int getColorAtXY(float x, float y) {
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// FIXME: colors.length == 0 -> devision by ZERO.s
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if (mOrientation == HORIZONTAL) {
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int left = 0;
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int right = 0;
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for (int i = 0; i < colors.length; i++) {
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left = right;
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right += cellSize;
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if (left <= x && right >= x) {
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return colors[i];
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}
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}
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} else {
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int top = 0;
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int bottom = 0;
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for (int i = 0; i < colors.length; i++) {
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top = bottom;
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bottom += cellSize;
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if (y >= top && y <= bottom) {
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return colors[i];
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}
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}
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}
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return selectedColor;
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}
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@Override
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protected Parcelable onSaveInstanceState() {
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// begin boilerplate code that allows parent classes to save state
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Parcelable superState = super.onSaveInstanceState();
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SavedState ss = new SavedState(superState);
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// end
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ss.selectedColor = this.selectedColor;
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ss.isColorSelected = this.isColorSelected;
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return ss;
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}
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@Override
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protected void onRestoreInstanceState(Parcelable state) {
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// begin boilerplate code so parent classes can restore state
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if (!(state instanceof SavedState)) {
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super.onRestoreInstanceState(state);
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return;
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}
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SavedState ss = (SavedState) state;
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super.onRestoreInstanceState(ss.getSuperState());
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// end
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this.selectedColor = ss.selectedColor;
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this.isColorSelected = ss.isColorSelected;
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}
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@Override
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public boolean performClick() {
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return super.performClick();
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}
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@Override
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protected void onSizeChanged(int w, int h, int oldw, int oldh) {
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screenW = w;
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screenH = h;
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recalcCellSize();
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super.onSizeChanged(w, h, oldw, oldh);
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}
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/**
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* Return currently selected color.
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*/
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public int getColor() {
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return selectedColor;
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}
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// @Override
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// protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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// int parentWidth = MeasureSpec.getSize(widthMeasureSpec);
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// int parentHeight = MeasureSpec.getSize(heightMeasureSpec);
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// this.setMeasuredDimension(parentWidth, parentHeight);
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// super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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// }
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/**
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* Set selected color as color value from palette.
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*/
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public void setSelectedColor(int color) {
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// not from current palette
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if (!containsColor(colors, color)) {
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return;
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}
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// do we need to re-draw view?
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if (!isColorSelected || selectedColor != color) {
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this.selectedColor = color;
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isColorSelected = true;
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invalidate();
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onColorChanged(color);
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}
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}
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/**
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* Set selected color as index from palete
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*/
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public void setSelectedColorPosition(int position) {
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setSelectedColor(colors[position]);
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}
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private int recalcCellSize() {
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if (mOrientation == HORIZONTAL) {
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cellSize = Math.round(screenW / (colors.length * 1f));
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} else {
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cellSize = Math.round(screenH / (colors.length * 1f));
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}
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return cellSize;
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}
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/**
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* Return current picker palete
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*/
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public int[] getColors() {
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return colors;
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}
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/**
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* Set picker palette
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*/
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public void setColors(int[] colors) {
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// TODO: selected color can be NOT in set of colors
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// FIXME: colors can be null
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this.colors = colors;
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if (!containsColor(colors, selectedColor)) {
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selectedColor = colors[0];
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}
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recalcCellSize();
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invalidate();
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}
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/**
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* Return true if palette contains this color
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*/
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private boolean containsColor(int[] colors, int c) {
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for (int i = 0; i < colors.length; i++) {
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if (colors[i] == c)
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return true;
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}
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return false;
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}
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/**
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* Set onColorChanged listener
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*
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* @param l
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*/
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public void setOnColorChangedListener(OnColorChangedListener l) {
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this.onColorChanged = l;
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}
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static class SavedState extends BaseSavedState {
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// required field that makes Parcelables from a Parcel
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public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
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public SavedState createFromParcel(Parcel in) {
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return new SavedState(in);
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}
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public SavedState[] newArray(int size) {
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return new SavedState[size];
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}
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};
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int selectedColor;
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boolean isColorSelected;
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SavedState(Parcelable superState) {
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super(superState);
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}
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private SavedState(Parcel in) {
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super(in);
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this.selectedColor = in.readInt();
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this.isColorSelected = in.readInt() == 1;
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}
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@Override
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public void writeToParcel(Parcel out, int flags) {
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super.writeToParcel(out, flags);
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out.writeInt(this.selectedColor);
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out.writeInt(this.isColorSelected ? 1 : 0);
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}
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}
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}
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@@ -0,0 +1,5 @@
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package uz.shift.colorpicker;
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public interface OnColorChangedListener {
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void onColorChanged(int c);
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}
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24
app/src/main/java/uz/shift/colorpicker/Palette.java
Normal file
24
app/src/main/java/uz/shift/colorpicker/Palette.java
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@@ -0,0 +1,24 @@
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package uz.shift.colorpicker;
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import android.graphics.Color;
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public class Palette {
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public static int[] DEFAULT;
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static {
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DEFAULT = new int[]{Color.parseColor("#b8c847"),
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Color.parseColor("#67bb43"), Color.parseColor("#41b691"),
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Color.parseColor("#4182b6"), Color.parseColor("#4149b6"),
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Color.parseColor("#7641b6"), Color.parseColor("#b741a7"),
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Color.parseColor("#c54657"), Color.parseColor("#d1694a"),
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Color.parseColor("#d1904a"), Color.parseColor("#d1c54a")};
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}
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private Palette() {
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}
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}
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