From 21e5aac024a3fa7ba65271276ed76eeff4d799fa Mon Sep 17 00:00:00 2001
From: Le Tan <tamlokveer@gmail.com>
Date: Thu, 19 Jul 2018 20:53:09 +0800
Subject: [PATCH] VTextEdit: force to update() to show cursor while dragging
 text

This is a work-around.
---
 src/vtextdocumentlayout.cpp | 10 ----------
 src/vtextdocumentlayout.h   | 10 ++++++++++
 src/vtextedit.cpp           | 11 +++++++++++
 src/vtextedit.h             |  2 ++
 4 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/src/vtextdocumentlayout.cpp b/src/vtextdocumentlayout.cpp
index 182c9aec..bc090eaf 100644
--- a/src/vtextdocumentlayout.cpp
+++ b/src/vtextdocumentlayout.cpp
@@ -793,16 +793,6 @@ void VTextDocumentLayout::updateDocumentSize()
     }
 }
 
-void VTextDocumentLayout::setCursorWidth(int p_width)
-{
-    m_cursorWidth = p_width;
-}
-
-int VTextDocumentLayout::cursorWidth() const
-{
-    return m_cursorWidth;
-}
-
 QRectF VTextDocumentLayout::blockRectFromTextLayout(const QTextBlock &p_block,
                                                     ImagePaintInfo *p_image)
 {
diff --git a/src/vtextdocumentlayout.h b/src/vtextdocumentlayout.h
index da9ab57b..408eee13 100644
--- a/src/vtextdocumentlayout.h
+++ b/src/vtextdocumentlayout.h
@@ -385,4 +385,14 @@ inline void VTextDocumentLayout::setCursorLineBlockNumber(int p_blockNumber)
         }
     }
 }
+
+inline void VTextDocumentLayout::setCursorWidth(int p_width)
+{
+    m_cursorWidth = p_width;
+}
+
+inline int VTextDocumentLayout::cursorWidth() const
+{
+    return m_cursorWidth;
+}
 #endif // VTEXTDOCUMENTLAYOUT_H
diff --git a/src/vtextedit.cpp b/src/vtextedit.cpp
index 4fad8650..8362e845 100644
--- a/src/vtextedit.cpp
+++ b/src/vtextedit.cpp
@@ -447,3 +447,14 @@ void VTextEdit::updateLineNumberAreaWidth(const QFontMetrics &p_metrics)
 {
     m_lineNumberArea->setDigitWidth(p_metrics.width(QLatin1Char('8')));
 }
+
+void VTextEdit::dragMoveEvent(QDragMoveEvent *p_event)
+{
+    QTextEdit::dragMoveEvent(p_event);
+
+    // We need to update the cursor rect to show the cursor while dragging text.
+    // This is a work-around. We do not know why VTextEdit won't update the cursor
+    // rect to show the cursor.
+    // TODO: find out the rect of current cursor to update that rect only.
+    update();
+}
diff --git a/src/vtextedit.h b/src/vtextedit.h
index 0506a3dd..4cb5a64f 100644
--- a/src/vtextedit.h
+++ b/src/vtextedit.h
@@ -83,6 +83,8 @@ protected:
 
     void updateLineNumberAreaWidth(const QFontMetrics &p_metrics);
 
+    void dragMoveEvent(QDragMoveEvent *p_event) Q_DECL_OVERRIDE;
+
 private slots:
     // Update viewport margin to hold the line number area.
     void updateLineNumberAreaMargin();