Added Game View.
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app/src/main/java/fr/iutfbleau/sae/GameView.java
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267
app/src/main/java/fr/iutfbleau/sae/GameView.java
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package fr.iutfbleau.sae;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.Point;
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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 androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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public class GameView extends View implements View.OnTouchListener {
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public static final int CELL_SIZE = 96;
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public static final int LINE_SIZE = 12;
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private GameModel model;
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private final Point offset;
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private final Paint paint;
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private int linePointerId;
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private int movementPointerId;
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private float movementX;
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private float movementY;
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private GameListener listener;
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public GameView(Context context, @Nullable AttributeSet attributes) {
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super(context, attributes);
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this.offset = new Point(0, 0);
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this.paint = new Paint(Paint.ANTI_ALIAS_FLAG);
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this.setOnTouchListener(this);
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this.linePointerId = -1;
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this.movementPointerId = -1;
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}
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public void setModel(GameModel model) {
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this.model = model;
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}
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public void setListener(GameListener listener) {
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this.listener = listener;
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}
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public void applyOffset(int dx, int dy) {
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this.offset.offset(dx, dy);
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}
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public void setOffset(int x, int y) {
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this.offset.x = x;
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this.offset.y = y;
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}
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public Point getOffset() {
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return new Point(offset);
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}
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private Cell pixelToCell(float x, float y) {
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int ox = this.offset.x + (this.getWidth() - this.model.getSize() * CELL_SIZE + CELL_SIZE) / 2;
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int oy = this.offset.y + (this.getHeight() - this.model.getSize() * CELL_SIZE + CELL_SIZE) / 2;
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return new Cell(Math.round((x - ox) / CELL_SIZE), Math.round((y - oy) / CELL_SIZE));
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}
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private Cell pixelToCell(Point point) {
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return pixelToCell(point.x, point.y);
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}
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private Point cellToPixel(Cell cell) {
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int ox = this.offset.x + (this.getWidth() - this.model.getSize() * CELL_SIZE + CELL_SIZE) / 2;
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int oy = this.offset.y + (this.getHeight() - this.model.getSize() * CELL_SIZE + CELL_SIZE) / 2;
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return new Point(ox + cell.x * CELL_SIZE, oy + cell.y * CELL_SIZE);
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}
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private void drawGrid(Canvas canvas) {
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int w = this.getWidth();
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int h = this.getHeight();
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this.paint.setColor(this.getResources().getColor(R.color.grid));
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this.paint.setStrokeWidth(LINE_SIZE);
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Point pixelOffset = this.cellToPixel(new Cell(0, 0));
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for (int x = pixelOffset.x % CELL_SIZE; x < w; x += CELL_SIZE)
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canvas.drawLine(x, 0, x, h, this.paint);
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for (int y = pixelOffset.y % CELL_SIZE; y < h; y += CELL_SIZE)
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canvas.drawLine(0, y, w, y, this.paint);
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}
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private void drawCrosses(Canvas canvas) {
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this.paint.setColor(this.getResources().getColor(R.color.cross));
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this.paint.setStrokeWidth(LINE_SIZE);
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for (Cell cell : this.model.getCells())
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this.drawCross(canvas, cell);
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}
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private void drawCross(Canvas canvas, Cell cell) {
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float size = CELL_SIZE / 4.0F;
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Point position = this.cellToPixel(cell);
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canvas.drawLine(position.x, position.y - size, position.x, position.y + size, this.paint);
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canvas.drawLine(position.x - size, position.y, position.x + size, position.y, this.paint);
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}
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private void drawInputLine(Canvas canvas) {
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if (!this.model.hasInputLine())
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return;
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if (this.model.isInputLineValid())
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this.paint.setColor(this.getResources().getColor(R.color.valid_input_line));
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else
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this.paint.setColor(this.getResources().getColor(R.color.invalid_input_line));
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this.paint.setStrokeWidth(LINE_SIZE);
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Point start = this.cellToPixel(this.model.getInputLineStart());
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Point end = this.cellToPixel(this.model.getInputLineEnd());
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canvas.drawLine(start.x, start.y, end.x, end.y, paint);
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}
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private void drawLines(Canvas canvas) {
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this.paint.setColor(this.getResources().getColor(R.color.line));
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this.paint.setStrokeWidth(LINE_SIZE);
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for (Line line : this.model.getLines()) {
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Point start = this.cellToPixel(line.getStart());
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Point end = this.cellToPixel(line.getEnd());
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canvas.drawLine(start.x, start.y, end.x, end.y, paint);
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}
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}
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@Override
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protected void onDraw(@NonNull Canvas canvas) {
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super.onDraw(canvas);
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this.drawGrid(canvas);
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if (this.model != null)
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return;
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this.drawLines(canvas);
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this.drawCrosses(canvas);
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this.drawInputLine(canvas);
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}
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@Override
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public boolean onTouch(View view, MotionEvent event) {
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if (this != view)
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return false;
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switch (event.getActionMasked()) {
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case MotionEvent.ACTION_DOWN: {
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if (this.linePointerId != -1)
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break;
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int index = event.getActionIndex();
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this.linePointerId = event.getPointerId(index);
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if (this.listener != null)
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this.listener.onLineStarted(this, this.pixelToCell(event.getX(index), event.getY(index)));
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break;
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}
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case MotionEvent.ACTION_POINTER_DOWN: {
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if (this.movementPointerId != -1)
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break;
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int index = event.getActionIndex();
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this.movementPointerId = event.getPointerId(index);
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this.movementX = event.getX(index);
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this.movementY = event.getY(index);
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break;
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}
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case MotionEvent.ACTION_MOVE: {
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if (this.movementPointerId != -1) {
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int index = event.findPointerIndex(this.movementPointerId);
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float x = event.getX(index);
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float y = event.getY(index);
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if (x != this.movementX || y != this.movementY) {
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this.applyOffset(Math.round(x - this.movementX), Math.round(y - this.movementY));
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this.movementX = x;
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this.movementY = y;
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this.invalidate();
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}
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}
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if (this.linePointerId != -1) {
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int index = event.findPointerIndex(this.linePointerId);
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if (this.listener != null)
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this.listener.onLineEndMoved(this, this.pixelToCell(event.getX(index), event.getY(index)));
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}
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break;
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}
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case MotionEvent.ACTION_UP:
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case MotionEvent.ACTION_POINTER_UP: {
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int index = event.getActionIndex();
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int id = event.getPointerId(index);
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if (this.linePointerId == id) {
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this.linePointerId = -1;
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if (this.listener != null)
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this.listener.onLineEnded(this, this.pixelToCell(event.getX(index), event.getY(index)));
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}
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if (this.movementPointerId == id)
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this.movementPointerId = -1;
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}
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}
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return true;
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}
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}
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