fix: resolve linux drawing issue

SSARCandy · SSARCandy · commit 9145d049ef52 · 2020-07-18T20:38:31.000+08:00
diff --git a/include/gui.h b/include/gui.h
@@ -30,7 +30,6 @@ class DrawPane : public wxPanel
 
 private:
     std::string mode_;
-    wxClientDC dc_;
     CLD cld_;
     cv::Mat dis_;
 };
diff --git a/src/gui.cpp b/src/gui.cpp
@@ -429,7 +429,6 @@ void MyFrame::OnIdle(wxIdleEvent &evt)
 DrawPane::DrawPane(wxPanel *parent, cv::Size s)
     : cld_(s)
     , wxPanel(parent)
-    , dc_(wxClientDC(this))
 {
 }
 
@@ -457,7 +456,8 @@ void DrawPane::render()
     }
 
     wxBitmap bmp(wxImage(dis_.cols, dis_.rows, dis_.data, true));
-    dc_.DrawBitmap(bmp, 0, 0);
+    wxClientDC dc(this);
+    dc.DrawBitmap(bmp, 0, 0);
 }
 
 CLD &DrawPane::cld() { return cld_; }

Original file line number	Diff line number	Diff line change
`@@ -429,7 +429,6 @@ void MyFrame::OnIdle(wxIdleEvent &evt)`
`429`	`429`	`DrawPane::DrawPane(wxPanel *parent, cv::Size s)`
`430`	`430`	`: cld_(s)`
`431`	`431`	`, wxPanel(parent)`
`432`		`- , dc_(wxClientDC(this))`
`433`	`432`	`{`
`434`	`433`	`}`
`435`	`434`
`@@ -457,7 +456,8 @@ void DrawPane::render()`
`457`	`456`	`}`
`458`	`457`
`459`	`458`	`wxBitmap bmp(wxImage(dis_.cols, dis_.rows, dis_.data, true));`
`460`		`- dc_.DrawBitmap(bmp, 0, 0);`
	`459`	`+ wxClientDC dc(this);`
	`460`	`+ dc.DrawBitmap(bmp, 0, 0);`
`461`	`461`	`}`
`462`	`462`
`463`	`463`	`CLD &DrawPane::cld() { return cld_; }`