缩略图栏支持双击打开文件并增加缓存标记，微调设置界面关于按钮

app/scanner2/HGImgThumb.cpp

@@ -13,6 +13,7 @@
 #include "base/HGUtility.h"
 #include "imgfmt/HGImgFmt.h"
 #include "HGUIGlobal.h"
+#include "dialog_clrcache.h"
 
 
 HGImgThumb::HGImgThumb(QWidget* parent)
@@ -2762,6 +2763,17 @@ void HGImgThumb::paintEvent(QPaintEvent* e)
         painter.setPen(itemIndexPen);
         painter.drawText(itemIndexRect, Qt::AlignHCenter | Qt::AlignVCenter, itemIndex);
 
+        //绘制Item标记
+        if (0 == m_frontItems[i]->fileName.indexOf(Dialog_ClrCache::getCachePath()))
+        {
+            QRect markIndexRect(pt.x(), pt.y(), 20, 20);
+            QFont markIndexFont("微软雅黑", 10);
+            painter.setFont(markIndexFont);
+            QPen markPen(QColor(0, 0, 0, 255));
+            painter.setPen(markPen);
+            painter.drawText(markIndexRect, Qt::AlignHCenter | Qt::AlignVCenter, QString("*"));
+        }
+
         // 绘制文件名
         HGChar fileName[256] = {0};
         HGBase_GetFileName(m_frontItems[i]->fileName.toStdString().c_str(), fileName, 256);
@@ -3425,9 +3437,9 @@ void HGImgThumb::mouseDoubleClickEvent(QMouseEvent *e)
 
     MouseStatus mouseMoveStatus = MouseStatus_Null;
     int index = getItemIndex(e->pos(), mouseMoveStatus);
-    if (MouseStatus_Null == mouseMoveStatus && -1 != index)
+    if (MouseStatus_Null == mouseMoveStatus)
     {
-        if (m_curItemIndex == index && m_frontItems[index]->selected)
+//        if (m_curItemIndex == index && m_frontItems[index]->selected)
             emit itemDoubleClicked(index);
     }
     else

app/scanner2/mainwindow.cpp

@@ -817,6 +817,7 @@ void MainWindow::on_currItemChanged(int index)
 void MainWindow::on_itemDoubleClicked(int index)
 {
     (void)index;
+    on_act_open_triggered();
 }
 
 void MainWindow::on_thumbContextMenu(int index)

modules/twainui/hg_settingdialog.cpp

@@ -754,6 +754,7 @@ void hg_settingdialog::createUI()
 
    } //for
 
+    hlayoutOkAndCancel->insertWidget(0, buttonAbout, 0, Qt::AlignRight);
     updateUIStatus();
 
     scrollArea->setWidget(widget);