REPORT-54998 进一步优化代码，去除具体的方向判断，只留水平或者垂直。

designer-realize/src/main/java/com/fr/grid/GridMouseAdapter.java

@@ -463,52 +463,30 @@ public class GridMouseAdapter implements MouseListener, MouseWheelListener, Mous
         }
         int xDistance = evtX - this.oldEvtX;
         int yDistance = evtY - this.oldEvtY;
-        int dragDirection = calculateDragDirection(xDistance, yDistance);
-        Rectangle endRec = calculateEndRec(currentMouseCell, startRec, dragDirection);
+        boolean isHorizontal = isHorizontal(xDistance, yDistance);
+        Rectangle endRec = calculateEndRec(currentMouseCell, startRec, isHorizontal);
         grid.getDragRectangle().setBounds(calculateDragRectangle(startRec, endRec));
 
         reportPane.ensureColumnRowVisible(currentMouseCell.getColumn() + 1, currentMouseCell.getRow() + 1);
     }
 
-    private int calculateDragDirection(int xDistance, int yDistance) {
-        if (Math.abs(yDistance) > Math.abs(xDistance)) {
-            if (yDistance >= 0) {
-                return DIRECTION_DOWN;
-            } else {
-                return DIRECTION_UP;
-            }
-        } else {
-            if (xDistance >= 0) {
-                return DIRECTION_RIGHT;
-            } else {
-                return DIRECTION_LEFT;
-            }
-        }
+    private boolean isHorizontal(int xDistance, int yDistance) {
+        return Math.abs(yDistance) <= Math.abs(xDistance);
     }
 
     /**
      * 计算拖拽的结尾矩形
      * @param currentMouseCell 当前鼠标所在的格子
      * @param startRec 起始格子
-     * @param direction 拖拽方向
+     * @param isHorizontal 拖拽方向 水平or垂直
      * @return 计算拖拽的结尾矩形
      */
-    private Rectangle calculateEndRec(ColumnRow currentMouseCell, Rectangle startRec, int direction) {
-        Rectangle rec;
-        switch(direction) {
-            case DIRECTION_DOWN:
-            case DIRECTION_UP:
-                rec = new Rectangle(startRec.x, currentMouseCell.row, 1, 1);
-                break;
-            case DIRECTION_RIGHT:
-            case DIRECTION_LEFT:
-                rec = new Rectangle(currentMouseCell.column, startRec.y, 1, 1);
-                break;
-            default:
-                rec = new Rectangle();
-                break;
-        }
-        return rec;
+    private Rectangle calculateEndRec(ColumnRow currentMouseCell, Rectangle startRec, boolean isHorizontal) {
+        if (isHorizontal) {
+            return new Rectangle(currentMouseCell.column, startRec.y, 1, 1);
+        } else {
+            return new Rectangle(startRec.x, currentMouseCell.row, 1, 1);
+        }
     }
 
     /**