完善缩略图的滚动条功能

app/Scanner/Scanner/mainwindow.cpp

@@ -39,6 +39,8 @@ MainWindow::MainWindow(QWidget *parent)
     m_thumb->move(450, 100);
     m_thumb->resize(200, height() - 150);
 
+     connect(m_thumb, SIGNAL(currItemChanged(int)), this, SLOT(on_currItemChanged(int)), Qt::QueuedConnection);
+
     HGImage img = NULL;
     HGImgFmt_LoadImage("D:\\1.jpg", 0, NULL, HGBASE_IMGTYPE_RGB, HGBASE_IMGORIGIN_TOP, &img);
     m_view->addImage(img);
@@ -46,9 +48,13 @@ MainWindow::MainWindow(QWidget *parent)
 
     QImage img2("D:\\image.png");
     m_thumb->setDefItemImage(&img2);
-    m_thumb->setType(ThumbType_Vert);
+    m_thumb->setType(ThumbType_Grid);
+    //m_thumb->setGapSize(30);
+    m_thumb->setItemSize(80);
+    //m_thumb->setItemTextHeight(0);
+    //m_thumb->setScrollSize(12);
 
-    for (int i = 0; i < 1000; ++i)
+    for (int i = 0; i < 20000; ++i)
     {
         char fileName[256];
         sprintf(fileName, "D:\\Pictures\\%d.jpg", i);
@@ -120,3 +126,20 @@ void MainWindow::on_act_fullscreen_triggered()
 {
     m_view->setFullScreen(true);
 }
+
+void MainWindow::on_currItemChanged(int index)
+{
+    if (-1 != index)
+    {
+        QString fileName;
+        m_thumb->getItemFileName(index, fileName);
+
+        HGImage img = NULL;
+        HGImgFmt_LoadImage(fileName.toStdString().c_str(), 0, NULL, HGBASE_IMGTYPE_RGB, HGBASE_IMGORIGIN_TOP, &img);
+        if (NULL != img)
+        {
+            m_view->addImage(img);
+            HGBase_DestroyImage(img);
+        }
+    }
+}

app/Scanner/Scanner/mainwindow.h

@@ -42,6 +42,9 @@ private slots:
 
     void on_act_fullscreen_triggered();
 
+private slots:
+    void on_currItemChanged(int index);
+
 private:
     Ui::MainWindow *ui;
     HGImgView *m_view;

ui/HGImgThumb.hpp

@@ -23,28 +23,6 @@ enum ThumbRemoveFlag
     ThumbRemoveFlag_Delete = 2      // 从列表中删除，并删除文件
 };
 
-struct HGImgThumbItem
-{
-    HGImgThumbItem()
-    {
-        image = NULL;
-        selected = false;
-    }
-
-    ~HGImgThumbItem()
-    {
-        if (NULL != image)
-        {
-            delete image;
-            image = NULL;
-        }
-    }
-
-    QString fileName;
-    QImage *image;
-    bool selected;
-};
-
 class HGImgThumb : public QWidget
 {
     Q_OBJECT
@@ -52,18 +30,22 @@ public:
     HGImgThumb(QWidget* parent = nullptr);
     virtual ~HGImgThumb();
 
-    enum MoveStauts
-    {
-        MoveStatus_Null  = 0,
-        MoveStatus_HRoll = 1,
-        MoveStatus_VRoll = 2
-    };
+    HGResult setGapSize(int size);
+    HGResult setScrollSize(int size);
+    HGResult setItemSize(int size);
+    HGResult setItemTextHeight(int height);
+    HGResult setDefItemImage(const QImage *image);
+    HGResult setHScrollLeftImage(const QImage *normalImage, const QImage *hotImage, const QImage *pushImage);
+    HGResult setHScrollRightImage(const QImage *normalImage, const QImage *hotImage, const QImage *pushImage);
+    HGResult setVScrollTopImage(const QImage *normalImage, const QImage *hotImage, const QImage *pushImage);
+    HGResult setVScrollBottomImage(const QImage *normalImage, const QImage *hotImage, const QImage *pushImage);
+    HGResult setScrollImage(const QImage *image, const QRect *stretch);
+    HGResult setscrollSliderImage(const QImage *normalImage, const QRect *normalStretch, const QImage *hotImage, const QRect *hotStretch,
+        const QImage *pushImage, const QRect *pushStretch);
 
     HGResult setType(ThumbType type);
-    HGResult setGap(int width);
     HGResult zoomIn();
     HGResult zoomOut();
-    HGResult setDefItemImage(const QImage *image);
 
     HGResult getItemCount(int *count);
     HGResult addItem(const QString &fileName);
@@ -81,12 +63,50 @@ public:
     HGResult locateItem(int index);
 
 signals:
-    void currentItemChanged(int index);
+    void currItemChanged(int index);
     void itemDoubleClicked(int index);
     void itemCountChanged(int count);
     void itemSelectingChanged();
     void contextMenuEvent(int index);
 
+private:
+
+    struct HGImgThumbItem
+    {
+        HGImgThumbItem()
+        {
+            image = NULL;
+            selected = false;
+        }
+
+        ~HGImgThumbItem()
+        {
+            if (NULL != image)
+            {
+                delete image;
+                image = NULL;
+            }
+        }
+
+        QString fileName;
+        QImage *image;
+        bool selected;
+    };
+
+    enum MouseStatus
+    {
+        MouseStatus_Null = 0,
+        MouseStatus_HScroll,
+        MouseStatus_HScrollSlider,
+        MouseStatus_HScrollLeft,
+        MouseStatus_HScrollRight,
+        MouseStatus_VScroll,
+        MouseStatus_VScrollSlider,
+        MouseStatus_VScrollTop,
+        MouseStatus_VScrollBottom,
+        MouseStatus_NullScroll
+    };
+
 protected:
     virtual void mousePressEvent(QMouseEvent *e);
     virtual void mouseMoveEvent(QMouseEvent* e);
@@ -110,27 +130,30 @@ private slots:
 private:
     static QImage* createItemImage(const QImage *srcImage, int itemSize);
     static QImage* createItemImage(HGImage srcImage, int itemSize);
-    static void calcShowSize(int wndWidth, int wndHeight, int rollWidth, ThumbType type, int itemSize, int gapWidth, int itemCount,
-        int &showWidth, int &showHeight, bool &hRoll, bool &vRoll);
-    static void recalcShowRect(int wndWidth, int wndHeight, int rollWidth, ThumbType type, bool hRoll, bool vRoll, bool showThumb, HGRect &showRect);
+    static void calcShowSize(int wndWidth, int wndHeight, int gapSize, int scrollSize, int itemSize, int itemTextHeight, ThumbType type, int itemCount,
+        int &showWidth, int &showHeight, bool &hScroll, bool &vScroll);
+    static void recalcShowRect(int wndWidth, int wndHeight, int scrollSize, ThumbType type, bool hScroll, bool vScroll, bool showThumb, HGRect &showRect);
+
     void locateItemEx(int index);
     QPoint getItemLoc(int index);
     int getItemRow(int index);
     int getItemCol(int index);
     int getTotalRows();
     int getTotalCols();
-    int getItem(const QPoint &pt);
+    int getItem(const QPoint &pt, MouseStatus &mouseMoveStatus);
     int getInsertPos(const QPoint &pt);
     int findIndex(const QString &fileName);
-    QRect getHRollPos();
-    QRect getHRollLeftPos();
-    QRect getHRollRightPos();
-    QRect getVRollPos();
-    QRect getVRollTopPos();
-    QRect getVRollBottomPos();
-    QRect getHRollSliderPos();
-    QRect getVRollSliderPos();
-    QRect getNullRollPos();
+
+    QRect getHScrollLeftPos();
+    QRect getHScrollRightPos();
+    QRect getHScrollPos();
+    QRect getHScrollSliderPos();
+    QRect getVScrollTopPos();
+    QRect getVScrollBottomPos();
+    QRect getVScrollPos();
+    QRect getVScrollSliderPos();
+    QRect getNullScrollPos();
+
     void Show();
     static void ThreadFunc(HGThread thread, HGPointer param);
 
@@ -139,11 +162,23 @@ private:
     HGLock m_lockBack;
     HGLock m_lockItemSize;
     HGEvent m_event;
-    ThumbType m_type;
+
+    int m_gapSize;
+    int m_scrollSize;
+    int m_itemSize;
+    int m_itemTextHeight;
     QImage *m_defItemImage;
     QImage *m_itemImage;
-    int m_gapWidth;
-    int m_itemSize;
+    QImage *m_hScrollLeftImage[3];
+    QImage *m_hScrollRightImage[3];
+    QImage *m_vScrollTopImage[3];
+    QImage *m_vScrollBottomImage[3];
+    QImage *m_scrollImage;
+    QRect m_scrollImageStretch;
+    QImage *m_scrollSliderImage[3];
+    QRect m_scrollSliderImageStretch[3];
+    ThumbType m_type;
+
     int m_curItemIndex;
     int m_hotItemIndex;
     int m_signItemIndex;
@@ -151,15 +186,16 @@ private:
     HGThread m_thread;
     std::vector<HGImgThumbItem *> m_frontItems;
     std::list<QString> m_backList;
-    bool m_hRoll;
-    bool m_vRoll;
+    bool m_hScroll;
+    bool m_vScroll;
     bool m_showThumb;
     HGRect m_showRect;
     int m_mousePosX;
     int m_mousePosY;
-    MoveStauts m_moveStatus;
-    int m_beginX;
-    int m_beginY;
+    MouseStatus m_mouseMoveStatus;
+    MouseStatus m_mousePressStatus;
+    int m_mousePressBeginX;
+    int m_mousePressBeginY;
 };
 
 #endif /* __HGIMGTHUMB_HPP__ */