From d898a2b57ff5869e4606d13f05bc18a5ecddfa19 Mon Sep 17 00:00:00 2001
From: Krad <kradchen123@163.com>
Date: Tue, 23 Nov 2021 16:52:54 +0800
Subject: [PATCH] Slide able Table View

---
 src/components/SlideableTableView.cpp | 68 +++++++++++++++++++++++++++
 src/components/SlideableTableView.h   | 27 +++++++++++
 2 files changed, 95 insertions(+)
 create mode 100644 src/components/SlideableTableView.cpp
 create mode 100644 src/components/SlideableTableView.h

diff --git a/src/components/SlideableTableView.cpp b/src/components/SlideableTableView.cpp
new file mode 100644
index 0000000..8423fb9
--- /dev/null
+++ b/src/components/SlideableTableView.cpp
@@ -0,0 +1,68 @@
+//
+// Created by Krad on 2021/11/23.
+//
+
+#include "SlideableTableView.h"
+#include <QScrollBar>
+#include <QMouseEvent>
+#include <QApplication>
+
+SlideableTableView::SlideableTableView(QWidget *parent) : QTableView(parent) {
+
+}
+
+SlideableTableView::~SlideableTableView() {
+
+}
+
+void SlideableTableView::mousePressEvent(QMouseEvent *ev) {
+    isDragging = true;
+    ox = ev->pos().x();
+    oy = ev->pos().y();
+    ov = this->verticalScrollBar()->value();
+    QTableView::mousePressEvent(ev);
+}
+
+void SlideableTableView::mouseMoveEvent(QMouseEvent *ev) {
+    if (!isDragging)
+    {
+        QTableView::mouseMoveEvent(ev);
+        return;
+    } else{
+        if (this->verticalScrollBar()->isVisible())
+        {
+            int nv = (int)round(((double)ov*30.0+((double)(oy-ev->pos().y())))/30.0);
+            int max = this->verticalScrollBar()->maximum();
+            int min = this->verticalScrollBar()->minimum();
+            printf("max:%d, min:%d, nv:%d\r\n", max, min, nv);
+            nv = nv>max?max:(nv<min?min:nv);
+            this->verticalScrollBar()->setValue(nv);
+        }
+//        if (this->verticalScrollBar()->isVisible())
+//        {
+//            this->verticalScrollBar()->setPageStep(this->viewport()->height());
+//            this->verticalScrollBar()->setRange(0,this->height());
+//            int nv =this->verticalScrollBar()->value()+(oy-ev->pos().y());
+//            int max = this->verticalScrollBar()->maximum();
+//            int min = this->verticalScrollBar()->minimum();
+//            printf("max:%d, min:%d, nv:%d\r\n", max, min, nv);
+//            nv = nv>max?max:(nv<min?min:nv);
+//
+////            this->verticalScrollBar()->setValue(nv);
+//            return;
+//        }
+    }
+    QTableView::mouseMoveEvent(ev);
+}
+
+void SlideableTableView::mouseReleaseEvent(QMouseEvent *ev) {
+    if (!isDragging)
+    {
+        isDragging = false;
+    }
+    if (this->verticalScrollBar()->isVisible())
+    {
+        QApplication::sendEvent(this->verticalScrollBar(),ev);
+    }
+    QTableView::mouseReleaseEvent(ev);
+}
diff --git a/src/components/SlideableTableView.h b/src/components/SlideableTableView.h
new file mode 100644
index 0000000..212f17c
--- /dev/null
+++ b/src/components/SlideableTableView.h
@@ -0,0 +1,27 @@
+//
+// Created by Krad on 2021/11/23.
+//
+
+#ifndef GUI_SLIDEABLETABLEVIEW_H
+#define GUI_SLIDEABLETABLEVIEW_H
+
+#include <QTableView>
+class SlideableTableView:public QTableView {
+Q_OBJECT
+public:
+    explicit SlideableTableView(QWidget *parent = nullptr);
+    ~SlideableTableView();
+
+protected:
+    void mousePressEvent(QMouseEvent *ev) override ;
+    void mouseMoveEvent(QMouseEvent *ev) override ;
+    void mouseReleaseEvent(QMouseEvent *ev) override ;
+
+private:
+    bool isDragging = false;
+    int ox,oy,ov;
+
+};
+
+
+#endif //GUI_SLIDEABLETABLEVIEW_H