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fix transparent window example

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wxBG_STYLE_TRANSPARENT can only be set before window creation.
closes #16161


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76295 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Paul Cornett
2014-04-07 17:15:45 +00:00
parent 9b8b5b085d
commit 34c4b6e972
1 changed files with 20 additions and 49 deletions
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69
samples/shaped/shaped.cpp
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@@ -137,24 +137,13 @@ private:
class SeeThroughFrame : public wxFrame class SeeThroughFrame : public wxFrame
{ {
public: public:
// ctor(s) void Create();
SeeThroughFrame();
private:
// event handlers (these functions should _not_ be virtual) // event handlers (these functions should _not_ be virtual)
void OnDoubleClick(wxMouseEvent& evt); void OnDoubleClick(wxMouseEvent& evt);
void OnPaint(wxPaintEvent& evt); void OnPaint(wxPaintEvent& evt);
private:
enum State
{
STATE_SEETHROUGH,
STATE_TRANSPARENT,
STATE_OPAQUE,
STATE_MAX
};
State m_currentState;
// any class wishing to process wxWidgets events must use this macro // any class wishing to process wxWidgets events must use this macro
wxDECLARE_EVENT_TABLE(); wxDECLARE_EVENT_TABLE();
}; };
@@ -289,8 +278,14 @@ void MainFrame::OnShowShaped(wxCommandEvent& WXUNUSED(event))
void MainFrame::OnShowTransparent(wxCommandEvent& WXUNUSED(event)) void MainFrame::OnShowTransparent(wxCommandEvent& WXUNUSED(event))
{ {
SeeThroughFrame *seeThroughFrame = new SeeThroughFrame(); if (IsTransparentBackgroundSupported())
seeThroughFrame->Show(true); {
SeeThroughFrame *seeThroughFrame = new SeeThroughFrame;
seeThroughFrame->Create();
seeThroughFrame->Show(true);
}
else
wxMessageBox(wxS("transparent window requires a composited screen"));
} }
void MainFrame::OnShowEffect(wxCommandEvent& event) void MainFrame::OnShowEffect(wxCommandEvent& event)
@@ -481,16 +476,15 @@ wxBEGIN_EVENT_TABLE(SeeThroughFrame, wxFrame)
EVT_PAINT(SeeThroughFrame::OnPaint) EVT_PAINT(SeeThroughFrame::OnPaint)
wxEND_EVENT_TABLE() wxEND_EVENT_TABLE()
SeeThroughFrame::SeeThroughFrame() void SeeThroughFrame::Create()
: wxFrame(NULL, wxID_ANY, "Transparency test: double click here",
wxPoint(100, 30), wxSize(300, 300),
wxDEFAULT_FRAME_STYLE |
wxFULL_REPAINT_ON_RESIZE |
wxSTAY_ON_TOP),
m_currentState(STATE_SEETHROUGH)
{ {
SetBackgroundColour(*wxWHITE);
SetBackgroundStyle(wxBG_STYLE_TRANSPARENT); SetBackgroundStyle(wxBG_STYLE_TRANSPARENT);
wxFrame::Create(NULL, wxID_ANY, "Transparency test: double click here",
wxPoint(100, 30), wxSize(300, 300),
wxDEFAULT_FRAME_STYLE |
wxFULL_REPAINT_ON_RESIZE |
wxSTAY_ON_TOP);
SetBackgroundColour(*wxWHITE);
} }
// Paints a grid of varying hue and alpha // Paints a grid of varying hue and alpha
@@ -524,34 +518,11 @@ void SeeThroughFrame::OnPaint(wxPaintEvent& WXUNUSED(evt))
} }
} }
// Switches between colour and transparent background on doubleclick
void SeeThroughFrame::OnDoubleClick(wxMouseEvent& WXUNUSED(evt)) void SeeThroughFrame::OnDoubleClick(wxMouseEvent& WXUNUSED(evt))
{ {
m_currentState = (State)((m_currentState + 1) % STATE_MAX); SetBackgroundStyle(wxBG_STYLE_PAINT);
SetTransparent(255);
switch ( m_currentState ) SetTitle("Opaque");
{
case STATE_OPAQUE:
SetBackgroundStyle(wxBG_STYLE_COLOUR);
SetTransparent(255);
SetTitle("Opaque");
break;
case STATE_SEETHROUGH:
SetBackgroundStyle(wxBG_STYLE_TRANSPARENT);
SetTransparent(255);
SetTitle("See through");
break;
case STATE_TRANSPARENT:
SetBackgroundStyle(wxBG_STYLE_COLOUR);
SetTransparent(128);
SetTitle("Semi-transparent");
break;
case STATE_MAX:
wxFAIL_MSG( "unreachable" );
}
Refresh(); Refresh();
} }