Mouse detection

gridpreview.cpp

@@ -12,19 +12,67 @@ void GridPreview::setSize(int newWidth, int newHeight)
 {
     width = newWidth;
     height = newHeight;
+
+    update();
+    emit updatedContents();
 }
 
 void GridPreview::addLine(Line &line)
 {
     lines.push_back(line);
+
+    update();
+    emit updatedContents();
 }
 
 void GridPreview::removeLine(int index)
 {
     lines.removeAt(index);
+
+    update();
+    emit updatedContents();
 }
 
-QString GridPreview::toLuaTable()
+void GridPreview::setLineColor(int index, QString color)
+{
+    lines[index].setColor(color);
+
+    update();
+    emit updatedContents();
+}
+
+void GridPreview::setLineStartPoint(int index, int x, int y)
+{
+    lines[index].setStartPoint(x, y);
+
+    update();
+    emit updatedContents();
+}
+
+void GridPreview::setLineEndPoint(int index, int x, int y)
+{
+    lines[index].setEndPoint(x, y);
+
+    update();
+    emit updatedContents();
+}
+
+int GridPreview::getWidth()
+{
+    return width;
+}
+
+int GridPreview::getHeight()
+{
+    return height;
+}
+
+const Line &GridPreview::getLine(int index)
+{
+    return lines.at(index);
+}
+
+const QString GridPreview::toLuaTable()
 {
     QString output(tableTemplate.arg(width).arg(height));
     QString linesSubTable = "";
@@ -37,13 +85,15 @@ QString GridPreview::toLuaTable()
     return output.arg(linesSubTable);
 }
 
-void GridPreview::paintEvent(QPaintEvent *event)
+void GridPreview::paintEvent(QPaintEvent *)
 {
     QPainter painter(this);
     QPen pen(Qt::black, 2);
     painter.setPen(pen);
     QBrush brush(Qt::black);
-    bool widthBased = rect().width() > rect().height();
+    double aspectRatio = (double) rect().width() / rect().height();
+    double cellAspectRatio = (double) width / height;
+    bool widthBased = aspectRatio > cellAspectRatio;
     int cellSize = widthBased ?
                        rect().height() / height :
                        rect().width() / width;
@@ -101,9 +151,54 @@ void GridPreview::paintEvent(QPaintEvent *event)
     }
 }
 
-QColor GridPreview::colorFromString(QString color)
+const QColor GridPreview::colorFromString(const QString color)
 {
     if (!colorMap.contains(color))
         return colorMap[QString("red")];
     return colorMap[color];
 }
+
+void GridPreview::mouseMoveEvent(QMouseEvent *event)
+{
+    if (!mouseCaptured) {
+        return;
+    }
+}
+
+void GridPreview::mousePressEvent(QMouseEvent *event)
+{
+    mouseCaptured = true;
+
+    QPoint gridPos = localMousePosition(event);
+
+    std::cout << gridPos.x() << ',' << gridPos.y() << std::endl;
+}
+
+void GridPreview::mouseReleaseEvent(QMouseEvent *event)
+{
+    mouseCaptured = false;
+}
+
+const QPoint GridPreview::localMousePosition(QMouseEvent *event)
+{
+    QPoint position(event->position().toPoint());
+    return snapToGrid(position.x(), position.y());
+}
+
+const QPoint GridPreview::snapToGrid(int x, int y)
+{
+    double aspectRatio = (double) rect().width() / rect().height();
+    double cellAspectRatio = (double) width / height;
+    bool widthBased = aspectRatio > cellAspectRatio;
+    int cellSize = widthBased ?
+                       rect().height() / height :
+                       rect().width() / width;
+
+    int areaWidth = cellSize * width;
+    int areaHeight = cellSize * height;
+
+    int offsetX = (rect().width() - areaWidth) / 2;
+    int offsetY = (rect().height() - areaHeight) / 2;
+
+    return QPoint(1 + (x - offsetX) / cellSize, 1 + (y - offsetY) / cellSize);
+}