解决拖拽时无缩略图像会奔溃的问题

app/Scanner/Scanner/mainwindow.cpp

@@ -75,12 +75,14 @@ MainWindow::MainWindow(QWidget *parent)
     HGRect vStretchRect = {0, 20, 20, 60};
     //m_thumb->setVScrollSliderImage(&vScrollSliderImage, &vStretchRect, &vScrollSliderImage, &vStretchRect, &vScrollSliderImage, &vStretchRect);
 
+#ifdef HG_CMP_MSC
     for (int i = 0; i < 10000; ++i)
     {
         char fileName[256];
         sprintf(fileName, "D:\\Pictures\\%d.jpg", i);
         m_thumb->addItem(fileName);
     }
+#endif
 }
 
 MainWindow::~MainWindow()

ui/HGImgThumb.cpp

@@ -1821,19 +1821,23 @@ void HGImgThumb::mouseMoveEvent(QMouseEvent* e)
             QImage *img = m_frontItems[m_curItemIndex]->image;
             if (NULL == img)
                 img = m_itemImage;
-            pixmap = QPixmap::fromImage(*img);
+            if (NULL != img)
+                pixmap = QPixmap::fromImage(*img);
             HGBase_LeaveLock(m_lockFront);
 
-            QPainter painter(&pixmap);
-            QRect textRect(0, 0, pixmap.width(), pixmap.height());
-            char chCount[12];
-            sprintf(chCount, "%d", urls.count());
-            QFont font("微软雅黑", 16);
-            painter.setFont(font);
-            painter.drawText(textRect, Qt::AlignHCenter | Qt::AlignVCenter, chCount);
-
-            drag->setPixmap(pixmap);
-            drag->setHotSpot(QPoint(pixmap.width() / 2, 4 * pixmap.height() / 5));
+            if (!pixmap.isNull())
+            {
+                QPainter painter(&pixmap);
+                QRect textRect(0, 0, pixmap.width(), pixmap.height());
+                char chCount[12];
+                sprintf(chCount, "%d", urls.count());
+                QFont font("微软雅黑", 16);
+                painter.setFont(font);
+                painter.drawText(textRect, Qt::AlignHCenter | Qt::AlignVCenter, chCount);
+
+                drag->setPixmap(pixmap);
+                drag->setHotSpot(QPoint(pixmap.width() / 2, 4 * pixmap.height() / 5));
+            }
 
             m_operate = 0;
             m_operateStartX = -1;