add IsShown() accessor which is sometimes more convenient than IsHidden()

[wxWidgets.git] / include / wx / caret.h

diff --git a/include/wx/caret.h b/include/wx/caret.h
index 1c10856e42c97dd013de8f7894f7cd55f1b94811..e65e9deca1299501dbe4a297a216b9dcae0cefcd 100644 (file)
--- a/include/wx/caret.h
+++ b/include/wx/caret.h
@@ -1,30 +1,40 @@
 ///////////////////////////////////////////////////////////////////////////////
-// Name:        caret.h
+// Name:        wx/caret.h
 // Purpose:     wxCaretBase class - the interface of wxCaret
 // Author:      Vadim Zeitlin
 // Modified by:
 // Created:     23.05.99
 // RCS-ID:      $Id$
-// Copyright:   (c) wxWindows team
+// Copyright:   (c) wxWidgets team
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
 
 #ifndef _WX_CARET_H_BASE_
 #define _WX_CARET_H_BASE_
 
+#include "wx/defs.h"
+
+#if wxUSE_CARET
+
 // ---------------------------------------------------------------------------
 // forward declarations
 // ---------------------------------------------------------------------------
 
-class WXDLLEXPORT wxWindow;
-class WXDLLEXPORT wxWindowBase;
+class WXDLLIMPEXP_FWD_CORE wxWindow;
+class WXDLLIMPEXP_FWD_CORE wxWindowBase;
 
-// ---------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// headers we have to include
+// ----------------------------------------------------------------------------
+
+#include "wx/gdicmn.h"  // for wxPoint, wxSize
+
+// ----------------------------------------------------------------------------
 // A caret is a blinking cursor showing the position where the typed text will
 // appear. It can be either a solid block or a custom bitmap (TODO)
-// ---------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
 
-class WXDLLEXPORT wxCaretBase
+class WXDLLIMPEXP_CORE wxCaretBase
 {
 public:
     // ctors
@@ -47,6 +57,9 @@ public:
         (void)Create(window, size);
     }
 
+    // a virtual dtor has been provided since this class has virtual members
+    virtual ~wxCaretBase() { }
+
     // Create() functions - same as ctor but returns the success code
     // --------------------------------------------------------------
 
@@ -63,6 +76,9 @@ public:
         // is the caret valid?
     bool IsOk() const { return m_width != 0 && m_height != 0; }
 
+        // is the caret currently shown?
+    bool IsVisible() const { return m_countVisible > 0; }
+
         // get the caret position
     void GetPosition(int *x, int *y) const
     {
@@ -82,6 +98,15 @@ public:
         // get the window we're associated with
     wxWindow *GetWindow() const { return (wxWindow *)m_window; }
 
+        // change the size of the caret
+    void SetSize(int width, int height) {
+        m_width = width;
+        m_height = height;
+        DoSize();
+    }
+    void SetSize(const wxSize& size) { SetSize(size.x, size.y); }
+
+
     // operations
     // ----------
 
@@ -92,7 +117,7 @@ public:
         // show/hide the caret (should be called by wxWindow when needed):
         // Show() must be called as many times as Hide() + 1 to make the caret
         // visible
-    virtual void Show(bool show = TRUE)
+    virtual void Show(bool show = true)
         {
             if ( show )
             {
@@ -105,7 +130,7 @@ public:
                     DoHide();
             }
         }
-    virtual void Hide() { Show(FALSE); }
+    virtual void Hide() { Show(false); }
 
         // blink time is measured in milliseconds and is the time elapsed
         // between 2 inversions of the caret (blink time of the caret is common
@@ -130,13 +155,14 @@ protected:
         m_width = width;
         m_height = height;
 
-        return TRUE;
+        return true;
     }
 
     // pure virtuals to implement in the derived class
     virtual void DoShow() = 0;
     virtual void DoHide() = 0;
     virtual void DoMove() = 0;
+    virtual void DoSize() { }
 
     // the common initialization
     void Init()
@@ -160,19 +186,67 @@ protected:
     int m_countVisible;
 
 private:
-    DECLARE_NO_COPY_CLASS(wxCaretBase);
+    DECLARE_NO_COPY_CLASS(wxCaretBase)
 };
 
 // ---------------------------------------------------------------------------
 // now include the real thing
 // ---------------------------------------------------------------------------
 
-#ifdef __WXMSW__
+#if defined(__WXMSW__)
     #include "wx/msw/caret.h"
 #else
-    // not implemented yet
-    typedef wxCaretBase wxCaret;
+    #include "wx/generic/caret.h"
 #endif // platform
 
-#endif // _WX_CARET_H_BASE_
+// ----------------------------------------------------------------------------
+// wxCaretSuspend: a simple class which hides the caret in its ctor and
+// restores it in the dtor, this should be used when drawing on the screen to
+// avoid overdrawing the caret
+// ----------------------------------------------------------------------------
+
+#ifdef wxHAS_CARET_USING_OVERLAYS
+
+// we don't need to hide the caret if it's rendered using overlays
+class WXDLLIMPEXP_CORE wxCaretSuspend
+{
+public:
+    wxCaretSuspend(wxWindow *WXUNUSED(win)) {}
+
+    DECLARE_NO_COPY_CLASS(wxCaretSuspend)
+};
+
+#else // !wxHAS_CARET_USING_OVERLAYS
+
+class WXDLLIMPEXP_CORE wxCaretSuspend
+{
+public:
+    wxCaretSuspend(wxWindow *win)
+    {
+        m_caret = win->GetCaret();
+        m_show = false;
+        if ( m_caret && m_caret->IsVisible() )
+        {
+            m_caret->Hide();
+            m_show = true;
+        }
+    }
 
+    ~wxCaretSuspend()
+    {
+        if ( m_caret && m_show )
+            m_caret->Show();
+    }
+
+private:
+    wxCaret *m_caret;
+    bool     m_show;
+
+    DECLARE_NO_COPY_CLASS(wxCaretSuspend)
+};
+
+#endif // wxHAS_CARET_USING_OVERLAYS/!wxHAS_CARET_USING_OVERLAYS
+
+#endif // wxUSE_CARET
+
+#endif // _WX_CARET_H_BASE_