ifix: picking at 1080p 100% scaling

close #44

Author: XMuli

ChessBoard.cpp

@@ -7,23 +7,28 @@
 #include "ui_ChessBoard.h"
 #include <mutex>
 
-ChessBoard::ChessBoard(QWidget *parent) :
-    QMainWindow(parent),
-    ui(new Ui::ChessBoard)
-{
+ChessBoard::ChessBoard(QWidget *parent) :
+    QMainWindow(parent),
+    ui(new Ui::ChessBoard)
+{
     init();
 
     //计时器部分
     m_timer = new QTimer;  //初始化定时器
     m_timeRecord  = new QTime(0, 0, 0); //初始化时间
     m_bIsStart = false;  //初始为还未计时
     connect(m_timer,SIGNAL(timeout()),this,SLOT(updateTime()));
-
-    m_pAbout = new AboutAuthor();
-
-    this->setWindowIcon(QIcon(":/images/chess.svg"));
-    ui->setupUi(this);
-}
+
+    m_pAbout = new AboutAuthor();
+
+    this->setWindowIcon(QIcon(":/images/chess.svg"));
+    ui->setupUi(this);
+
+    // 交互只依赖于 ChessBoard，自身绘制用的 QLabel 需要放行鼠标事件
+    if (ui->label) {
+        ui->label->setAttribute(Qt::WA_TransparentForMouseEvents, true);
+    }
+}
 
 ChessBoard::~ChessBoard()
 {
@@ -183,22 +188,53 @@ QPointF ChessBoard::center(int row, int col)
 }
 
 //重载:坐标转换
-QPointF ChessBoard::center(int id)
-{
-    return center(m_ChessPieces[id].m_nRow, m_ChessPieces[id].m_nCol);
-}
-
-void ChessBoard::paintEvent(QPaintEvent *)
-{
-    QPainter painter(this);
-    painter.setRenderHint(QPainter::Antialiasing, true);
-    int side = qMin(int((ui->centralwidget->width() - ui->verticalWidget->width()) / 0.9), ui->label->height());
-    painter.scale(side / 960.0, side / 960.0);
-
-        m_nOffSet = 60.0;  //距离界面的边距
-        m_nD = 90.0;       //间距为50px
-        m_nR = m_nD/2.0;   //棋子半径为d/2
-
+QPointF ChessBoard::center(int id)
+{
+    return center(m_ChessPieces[id].m_nRow, m_ChessPieces[id].m_nCol);
+}
+
+bool ChessBoard::boardTransform(QPointF& origin, qreal& side) const
+{
+    if (!ui || !ui->label)
+        return false;
+
+    const QPoint topLeft = ui->label->mapTo(this, QPoint(0, 0));
+    const QSize boardSize = ui->label->size();
+    if (boardSize.isEmpty())
+        return false;
+
+    const qreal width = boardSize.width();
+    const qreal height = boardSize.height();
+    side = qMin(width, height);
+    if (side <= 0.0)
+        return false;
+
+    origin = QPointF(topLeft);
+    origin.rx() += (width - side) / 2.0;
+    origin.ry() += (height - side) / 2.0;
+    return true;
+}
+
+void ChessBoard::paintEvent(QPaintEvent *event)
+{
+    QMainWindow::paintEvent(event);
+
+    QPointF boardOrigin;
+    qreal boardSide = 0.0;
+    if (!boardTransform(boardOrigin, boardSide))
+        return;
+
+    QPainter painter(this);
+    painter.setRenderHint(QPainter::Antialiasing, true);
+    painter.save();
+    painter.translate(boardOrigin);
+    const qreal scale = boardSide / 960.0;
+    painter.scale(scale, scale);
+
+        m_nOffSet = 60.0;  //距离界面的边距
+        m_nD = 90.0;       //间距为50px
+        m_nR = m_nD/2.0;   //棋子半径为d/2
+
         //*******************绘画棋盘*******************
         //绘画10条横线
         for(int i = 0; i <= 9; i++)
@@ -239,12 +275,13 @@ void ChessBoard::paintEvent(QPaintEvent *)
         if(m_bIsShowStep)
             drawLastStep(painter,m_ChessSteps);
 
-        for(int i = 0; i < 32; i++)
-            drawChessPieces(painter, i);
-
-        //绘制文本棋谱
-        drawTextStep();
-}
+        for(int i = 0; i < 32; i++)
+            drawChessPieces(painter, i);
+
+        //绘制文本棋谱
+        painter.restore();
+        drawTextStep();
+}
 
 void ChessBoard::drawChessPieces(QPainter &painter, int id)   //绘画单个具体的棋子
 {
@@ -361,15 +398,19 @@ void ChessBoard::winMessageBox(QString title, QString msg)
     message.exec();
 }
 
-QPointF ChessBoard::getRealPoint(QPointF pt)
-{
-// 计算 side 时，确保使用 qreal 以避免精度丢失
-    qreal side = qMin(qreal((ui->centralwidget->width() - ui->verticalWidget->width()) / 0.9), qreal(ui->label->height()));
-    QPointF realPt;
-    realPt.setX(pt.x() * 960.0 / side);
-    realPt.setY(pt.y() * 960.0 / side);
-    return realPt;
-}
+QPointF ChessBoard::getRealPoint(QPointF pt)
+{
+    QPointF origin;
+    qreal side = 0.0;
+    if (!boardTransform(origin, side) || side <= 0.0)
+        return QPointF(-1.0, -1.0);
+
+    const QPointF relative = pt - origin;
+    QPointF realPt;
+    realPt.setX(relative.x() * 960.0 / side);
+    realPt.setY(relative.y() * 960.0 / side);
+    return realPt;
+}
 
 bool ChessBoard:: isGeneral()
 {
@@ -740,15 +781,23 @@ bool ChessBoard:: canSelect(int id)
     return m_bIsRed== m_ChessPieces[id].m_bRed;
 }
 
-void ChessBoard::mouseReleaseEvent(QMouseEvent *ev)
-{
-    if (ev->button() != Qt::LeftButton || m_bIsOver== true) { // 排除鼠标右键点击 游戏已结束则直接返回
-        return;
-    }
-    QPoint mousePos = ev->pos();  // 逻辑坐标
-    QPointF pt = getRealPoint(mousePos);  // 转换为虚拟坐标，使用 QPointF
-    click(pt);
-}
+void ChessBoard::mouseReleaseEvent(QMouseEvent *ev)
+{
+    if (ev->button() != Qt::LeftButton || m_bIsOver== true) { // 排除鼠标右键点击 游戏已结束则直接返回
+        return;
+    }
+
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    const QPointF globalPos = ev->globalPosition();
+#else
+    const QPointF globalPos = ev->globalPos();
+#endif
+    const QPointF windowTopLeft = mapToGlobal(QPoint(0, 0));
+    const QPointF mousePos = globalPos - windowTopLeft;  // 统一转换为 ChessBoard 坐标系
+
+    QPointF pt = getRealPoint(mousePos);  // 转换为虚拟坐标
+    click(pt);
+}
 
 void ChessBoard::click(QPointF pt)
 {

ChessBoard.h

@@ -69,10 +69,10 @@ class ChessBoard : public QMainWindow
     void whoWin();                                           // 谁胜谁负
     bool isChecked(QPointF pt, int& row, int& col);           // 是否选中该枚棋子。pt为输入参数; row， col为输出参数
     int relation(int row1, int col1, int row2, int col2);    // 计算选中的棋子的位置和要移动的位置之间的位置关系
-    QPointF getRealPoint(QPointF pt);                          // 使mouseMoveEvent取得的坐标同Painter的坐标一致
-    bool isGeneral();                                        // 校验将移动后位置是否将死
-    void showNetworkGui(const bool& show = false);
-
+    QPointF getRealPoint(QPointF pt);                          // 使mouseMoveEvent取得的坐标同Painter的坐标一致
+    bool isGeneral();                                        // 校验将移动后位置是否将死
+    void showNetworkGui(const bool& show = false);
+
 private:
     bool hongMenFeast();                                     // 鸿门宴：对将
     bool havePieces(int row, int col);                       // 判断某一格子，是否有棋子
@@ -81,14 +81,15 @@ class ChessBoard : public QMainWindow
 
 public:
     //视图相关
-    QPointF center(int row, int col);                                    // 象棋的棋盘的坐标转换成界面坐标
-    QPointF center(int id);
-    virtual void paintEvent(QPaintEvent *);                             // 绘画棋盘
-    void drawChessPieces(QPainter& painter, int id);                    // 绘画单个具体的棋子
-    void drawLastStep(QPainter &painter, QVector<ChessStep*>& steps);   // 绘制上次移动棋子的起止位置
-    void drawTextStep();                                                // 绘制文本棋谱
-//    virtual void mousePressEvent(QMouseEvent *);                      // 鼠标点击事件
-//    virtual void clickPieces(int checkedID, int& row, int& col);
+    QPointF center(int row, int col);                                    // 象棋的棋盘的坐标转换成界面坐标
+    QPointF center(int id);
+    virtual void paintEvent(QPaintEvent *);                             // 绘画棋盘
+    void drawChessPieces(QPainter& painter, int id);                    // 绘画单个具体的棋子
+    void drawLastStep(QPainter &painter, QVector<ChessStep*>& steps);   // 绘制上次移动棋子的起止位置
+    void drawTextStep();                                                // 绘制文本棋谱
+//    virtual void mousePressEvent(QMouseEvent *);                      // 鼠标点击事件
+//    virtual void clickPieces(int checkedID, int& row, int& col);
+    bool boardTransform(QPointF& origin, qreal& side) const;            // 计算棋盘绘制和点击的起点与边长
 
     // 象棋移动的规则[将  士  象  马  车  炮  兵]
     bool canMove(int moveId, int killId, int row, int col);

MachineGame.cpp

@@ -128,11 +128,16 @@ void MachineGame::mousePressEvent(QMouseEvent *ev)
         return;
     }
 
-    int row, col;
-    QPointF pt = getRealPoint(ev->pos());  // 转换为虚拟坐标，使用 QPointF
-    if (!isChecked(pt, row, col)) {  // 使用 QPointF 调用 isChecked
-        return;
-    }
+    int row, col;
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    const QPointF logicalPos = ev->position();
+#else
+    const QPointF logicalPos = ev->pos();
+#endif
+    QPointF pt = getRealPoint(logicalPos);  // 转换为虚拟坐标
+    if (!isChecked(pt, row, col)) {
+        return;
+    }
 
     m_nCheckedID = -1;