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fix bug that integer overflow in progress widget

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This commit is contained in:
Jinhao 2018-01-07 04:18:23 +08:00
parent 58b7bdf2f7
commit 970872c96f
1 changed files with 6 additions and 2 deletions
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8
source/gui/widgets/progress.cpp
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@ -1,6 +1,6 @@
/*
* A Progress Indicator Implementation
* Copyright(C) 2003-2017 Jinhao(cnjinhao@hotmail.com)
* Copyright(C) 2003-2018 Jinhao(cnjinhao@hotmail.com)
*
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or copy at
@ -96,7 +96,11 @@ namespace nana
{
if (widget_)
{
auto value_px = (widget_->size().width - border_px * 2) * value_ / max_;
auto value_px = (widget_->size().width - border_px * 2);
//avoid overflow
if (value_ < max_)
value_px = static_cast<unsigned>(value_px * (double(value_) / double(max_)));
if (value_px != value_px_)
{