From f536e0f24b3bf8358a5e1cb960267d5a3abe5071 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Thu, 21 Oct 1999 13:56:34 +0000
Subject: [PATCH] wxClipboard::IsOpened() and wxCLipboardLocker helper class
 added

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4105 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 include/wx/clipbrd.h      | 33 +++++++++++++++++++++++++++++++++
 include/wx/gtk/clipbrd.h  |  3 +++
 include/wx/gtk1/clipbrd.h |  3 +++
 include/wx/msw/clipbrd.h  |  3 +++
 src/gtk/clipbrd.cpp       |  5 +++++
 src/gtk1/clipbrd.cpp      |  5 +++++
 src/msw/clipbrd.cpp       |  9 +++++++++
 7 files changed, 61 insertions(+)

diff --git a/include/wx/clipbrd.h b/include/wx/clipbrd.h
index 47f0af66b5..0870a03d29 100644
--- a/include/wx/clipbrd.h
+++ b/include/wx/clipbrd.h
@@ -46,6 +46,9 @@ public:
     // close the clipboard after Add/SetData() and GetData()
     virtual void Close() = 0;
 
+    // query whether the clipboard is opened
+    virtual bool IsOpened() const = 0;
+
     // add to the clipboard data
     //
     // NB: the clipboard owns the pointer and will delete it, so data must be
@@ -102,6 +105,36 @@ public:
 // The global clipboard object
 WXDLLEXPORT_DATA(extern wxClipboard *) wxTheClipboard;
 
+// ----------------------------------------------------------------------------
+// helpful class for opening the clipboard and automatically closing it
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxClipboardLocker
+{
+public:
+    wxClipboardLocker(wxClipboard *clipboard = (wxClipboard *)NULL)
+    {
+        m_clipboard = clipboard ? clipboard : wxTheClipboard;
+        if ( m_clipboard )
+        {
+            m_clipboard->Open();
+        }
+    }
+
+    bool IsOk() const { return m_clipboard->IsOpened(); }
+
+    ~wxClipboardLocker()
+    {
+        if ( m_clipboard )
+        {
+            m_clipboard->Close();
+        }
+    }
+
+private:
+    wxClipboard *m_clipboard;
+};
+
 #endif // wxUSE_CLIPBOARD
 
 #endif // _WX_CLIPBRD_H_BASE_
diff --git a/include/wx/gtk/clipbrd.h b/include/wx/gtk/clipbrd.h
index b6d2583e84..0bc454dc22 100644
--- a/include/wx/gtk/clipbrd.h
+++ b/include/wx/gtk/clipbrd.h
@@ -39,6 +39,9 @@ public:
     // close the clipboard after SetData() and GetData()
     virtual void Close();
 
+    // query whether the clipboard is opened
+    virtual bool IsOpened() const;
+
     // set the clipboard data. all other formats will be deleted.
     virtual bool SetData( wxDataObject *data );
 
diff --git a/include/wx/gtk1/clipbrd.h b/include/wx/gtk1/clipbrd.h
index b6d2583e84..0bc454dc22 100644
--- a/include/wx/gtk1/clipbrd.h
+++ b/include/wx/gtk1/clipbrd.h
@@ -39,6 +39,9 @@ public:
     // close the clipboard after SetData() and GetData()
     virtual void Close();
 
+    // query whether the clipboard is opened
+    virtual bool IsOpened() const;
+
     // set the clipboard data. all other formats will be deleted.
     virtual bool SetData( wxDataObject *data );
 
diff --git a/include/wx/msw/clipbrd.h b/include/wx/msw/clipbrd.h
index 05c8cef304..67f9d9d4fb 100644
--- a/include/wx/msw/clipbrd.h
+++ b/include/wx/msw/clipbrd.h
@@ -66,6 +66,9 @@ public:
     // close the clipboard after SetData() and GetData()
     virtual void Close();
 
+    // query whether the clipboard is opened
+    virtual bool IsOpened() const;
+
     // set the clipboard data. all other formats will be deleted.
     virtual bool SetData( wxDataObject *data );
 
diff --git a/src/gtk/clipbrd.cpp b/src/gtk/clipbrd.cpp
index 1304b0ddf1..b9f2472822 100644
--- a/src/gtk/clipbrd.cpp
+++ b/src/gtk/clipbrd.cpp
@@ -544,6 +544,11 @@ void wxClipboard::Close()
     m_open = FALSE;
 }
 
+bool wxClipboard::IsOpened() const
+{
+    return m_open;
+}
+
 bool wxClipboard::IsSupported( const wxDataFormat& format )
 {
     /* store requested format to be asked for by callbacks */
diff --git a/src/gtk1/clipbrd.cpp b/src/gtk1/clipbrd.cpp
index 1304b0ddf1..b9f2472822 100644
--- a/src/gtk1/clipbrd.cpp
+++ b/src/gtk1/clipbrd.cpp
@@ -544,6 +544,11 @@ void wxClipboard::Close()
     m_open = FALSE;
 }
 
+bool wxClipboard::IsOpened() const
+{
+    return m_open;
+}
+
 bool wxClipboard::IsSupported( const wxDataFormat& format )
 {
     /* store requested format to be asked for by callbacks */
diff --git a/src/msw/clipbrd.cpp b/src/msw/clipbrd.cpp
index f8287de98a..d9ca91ec44 100644
--- a/src/msw/clipbrd.cpp
+++ b/src/msw/clipbrd.cpp
@@ -474,6 +474,15 @@ bool wxClipboard::Open()
 #endif
 }
 
+bool wxClipboard::IsOpened() const
+{
+#if wxUSE_OLE_CLIPBOARD
+    return TRUE;
+#else
+    return wxIsClipboardOpened();
+#endif
+}
+
 bool wxClipboard::SetData( wxDataObject *data )
 {
     (void)wxEmptyClipboard();
-- 
2.45.2