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fix a crash when the size of a label is empty and '\t' is contained

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This commit is contained in:
Jinhao 2015-05-29 00:09:47 +08:00
parent d9444cb5be
commit 11d65763ce
2 changed files with 6 additions and 0 deletions
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3
source/gui/detail/window_layout.cpp
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@ -24,6 +24,9 @@ namespace nana
//class window_layout //class window_layout
void window_layout::paint(core_window_t* wd, bool is_redraw, bool is_child_refreshed) void window_layout::paint(core_window_t* wd, bool is_redraw, bool is_child_refreshed)
{ {
if (wd->drawer.graphics.empty())
return;
if (nullptr == wd->effect.bground) if (nullptr == wd->effect.bground)
{ {
if (is_redraw) if (is_redraw)

3
source/paint/detail/native_paint_interface.cpp
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@ -156,6 +156,9 @@ namespace detail
nana::size text_extent_size(drawable_type dw, const nana::char_t * text, std::size_t len) nana::size text_extent_size(drawable_type dw, const nana::char_t * text, std::size_t len)
{ {
if (nullptr == dw || nullptr == text || 0 == len)
return{};
nana::size extents = raw_text_extent_size(dw, text, len); nana::size extents = raw_text_extent_size(dw, text, len);
const nana::char_t* const end = text + len; const nana::char_t* const end = text + len;