API for change the visibility of button in the taskbar.

- ShowInTaskbar and HideInTaskbar
- Sample of usage.

Author: Chaobin Zhang

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77573 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/taskbarbutton.h

@@ -21,6 +21,8 @@ public:
     virtual ~wxTaskBarButtonImpl();
 
     virtual void SetProgressValue(int value) wxOVERRIDE;
+    virtual void ShowInTaskbar() wxOVERRIDE;
+    virtual void HideInTaskbar() wxOVERRIDE;
 
 private:
     friend class wxTopLevelWindowMSW;

include/wx/taskbarbutton.h

@@ -25,6 +25,8 @@ public:
 
     // Operations:
     virtual void SetProgressValue(int value) = 0;
+    virtual void ShowInTaskbar() = 0;
+    virtual void HideInTaskbar() = 0;
 
 private:
     wxDECLARE_NO_COPY_CLASS(wxTaskBarButton);

samples/taskbarbutton/taskbarbutton.cpp

@@ -22,6 +22,7 @@
 enum
 {
     ProgressValueSlider = wxID_HIGHEST,
+    VisibilityRadio,
 };
 
 class MyApp : public wxApp
@@ -39,8 +40,10 @@ private:
     wxDECLARE_EVENT_TABLE();
 
     void OnSetProgressValue(wxScrollEvent& WXUNUSED(event));
+    void OnVisibilityChange(wxCommandEvent& WXUNUSED(event));
 
     wxSlider *m_slider;
+    wxRadioBox *m_visibilityRadioBox;
 };
 
 IMPLEMENT_APP(MyApp)
@@ -74,7 +77,19 @@ MyFrame::MyFrame(const wxString& title)
     m_slider->SetTickFreq(10);
     spvSizer->Add(m_slider);
 
+    // Show/Hide in Taskbar section.
+    const wxString labels[] =
+    {
+        "&Show in Taskbar",
+        "&Hide in Taskbar"
+    };
+    m_visibilityRadioBox = new wxRadioBox(panel, VisibilityRadio, "Visibility:",
+                                          wxDefaultPosition, wxDefaultSize,
+                                          WXSIZEOF(labels), labels,
+                                          1, wxRA_SPECIFY_ROWS);
+
     gs->Add(spvSizer, 0, wxEXPAND);
+    gs->Add(m_visibilityRadioBox, 0, wxEXPAND);
 
     wxStaticText *text = new wxStaticText(
         panel, wxID_ANY, wxT("Welcome to wxTaskbarButton sample"));
@@ -90,9 +105,18 @@ MyFrame::MyFrame(const wxString& title)
 
 wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
     EVT_COMMAND_SCROLL_CHANGED(ProgressValueSlider, MyFrame::OnSetProgressValue)
+    EVT_RADIOBOX(VisibilityRadio, MyFrame::OnVisibilityChange)
 wxEND_EVENT_TABLE()
 
 void MyFrame::OnSetProgressValue(wxScrollEvent& WXUNUSED(event))
 {
     MSWGetTaskBarButton()->SetProgressValue(m_slider->GetValue());
 }
+
+void MyFrame::OnVisibilityChange(wxCommandEvent& WXUNUSED(event))
+{
+    if ( m_visibilityRadioBox->GetSelection() == 0 )
+        MSWGetTaskBarButton()->ShowInTaskbar();
+    else
+        MSWGetTaskBarButton()->HideInTaskbar();
+}

src/msw/taskbarbutton.cpp

@@ -1,6 +1,6 @@
 /////////////////////////////////////////////////////////////////////////////
 // Name:        src/msw/taskbarbutton.cpp
-// Purpose:     Implements wxTaskbarButtonImpl class for manipulating buttons on
+// Purpose:     Implements wxTaskBarButtonImpl class for manipulating buttons on
 //              the Windows taskbar.
 // Author:      Chaobin Zhang <zhchbin@gmail.com>
 // Created:     2014-06-01
@@ -22,7 +22,8 @@
 
 #include <Shobjidl.h>
 
-wxTaskBarButtonImpl::wxTaskBarButtonImpl(WXWidget parent) : m_hwnd(parent)
+wxTaskBarButtonImpl::wxTaskBarButtonImpl(WXWidget parent)
+    : m_hwnd(parent), m_taskbarList(NULL)
 {
     HRESULT hr = CoCreateInstance
                  (
@@ -60,4 +61,14 @@ void wxTaskBarButtonImpl::SetProgressValue(int value)
     m_taskbarList->SetProgressValue(m_hwnd, value, 100);
 }
 
+void wxTaskBarButtonImpl::ShowInTaskbar()
+{
+    m_taskbarList->AddTab(m_hwnd);
+}
+
+void wxTaskBarButtonImpl::HideInTaskbar()
+{
+    m_taskbarList->DeleteTab(m_hwnd);
+}
+
 #endif // wxUSE_TASKBARBUTTON