GUI: Fixed HexEditDialog behavior (x64dbg#670)

Fixed jumping to the end of the line when changing text.
'Keep size' will set the ASCII / Unicode text box to overwrite mode.

Author: Atvaark

src/gui/Src/Gui/HexEditDialog.cpp

@@ -96,6 +96,21 @@ void HexEditDialog::on_btnUnicode2Hex_clicked()
 void HexEditDialog::on_chkKeepSize_toggled(bool checked)
 {
     mHexEdit->setKeepSize(checked);
+    QByteArray data = mHexEdit->data();
+    if(checked)
+    {
+        int dataSize = data.size();
+        QString asciiMask = QString("x").repeated(dataSize / sizeof(char));
+        QString unicodeMask = QString("x").repeated(dataSize / sizeof(wchar_t));
+        ui->lineEditAscii->setInputMask(asciiMask);
+        ui->lineEditUnicode->setInputMask(unicodeMask);
+    }
+    else
+    {
+        ui->lineEditAscii->setInputMask("");
+        ui->lineEditUnicode->setInputMask("");
+        mHexEdit->setData(data);
+    }
 }
 
 void HexEditDialog::dataChangedSlot()
@@ -126,11 +141,15 @@ void HexEditDialog::dataChangedSlot()
 void HexEditDialog::on_lineEditAscii_textEdited(const QString & arg1)
 {
     Q_UNUSED(arg1);
+    int cursorPosition = ui->lineEditAscii->cursorPosition();
     on_btnAscii2Hex_clicked();
+    ui->lineEditAscii->setCursorPosition(cursorPosition);
 }
 
 void HexEditDialog::on_lineEditUnicode_textEdited(const QString & arg1)
 {
     Q_UNUSED(arg1);
+    int cursorPosition = ui->lineEditUnicode->cursorPosition();
     on_btnUnicode2Hex_clicked();
+    ui->lineEditUnicode->setCursorPosition(cursorPosition);
 }