streamlining code

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

diff --git a/include/wx/textentry.h b/include/wx/textentry.h
index 93ae8fbf37f27a2a07d5dc6d636298e90d342560..cdf6e522a4622b2a321c8d4ab05306d5276d8152 100644 (file)
--- a/include/wx/textentry.h
+++ b/include/wx/textentry.h
@@ -16,6 +16,8 @@
 typedef long wxTextPos;
 
 class WXDLLIMPEXP_FWD_BASE wxArrayString;
+class WXDLLIMPEXP_FWD_CORE wxTextEntryHintData;
+class WXDLLIMPEXP_FWD_CORE wxWindow;
 
 // ----------------------------------------------------------------------------
 // wxTextEntryBase
@@ -24,8 +26,8 @@ class WXDLLIMPEXP_FWD_BASE wxArrayString;
 class WXDLLIMPEXP_CORE wxTextEntryBase
 {
 public:
-    wxTextEntryBase() { m_eventsBlock = 0; }
-    virtual ~wxTextEntryBase() { }
+    wxTextEntryBase() { m_eventsBlock = 0; m_hintData = NULL; }
+    virtual ~wxTextEntryBase();
 
 
     // accessing the value
@@ -43,9 +45,9 @@ public:
     virtual void WriteText(const wxString& text) = 0;
     virtual void AppendText(const wxString& text);
 
-    virtual wxString GetValue() const = 0;
+    virtual wxString GetValue() const;
     virtual wxString GetRange(long from, long to) const;
-    bool IsEmpty() const { return GetLastPosition() > 0; }
+    bool IsEmpty() const { return GetLastPosition() <= 0; }
 
 
     // editing operations
@@ -129,6 +131,17 @@ public:
     virtual void SetMaxLength(unsigned long WXUNUSED(len)) { }
 
 
+    // hints
+    // -----
+
+    // hint is the (usually greyed out) text shown in the control as long as
+    // it's empty and doesn't have focus, it is typically used in controls used
+    // for searching to let the user know what is supposed to be entered there
+
+    virtual bool SetHint(const wxString& hint);
+    virtual wxString GetHint() const;
+
+
 protected:
     // flags for DoSetValue(): common part of SetValue() and ChangeValue() and
     // also used to implement WriteText() in wxMSW
@@ -140,6 +153,12 @@ protected:
     };
 
     virtual void DoSetValue(const wxString& value, int flags);
+    virtual wxString DoGetValue() const = 0;
+
+    // override this to return the associated window, it will be used for event
+    // generation and also by generic hints implementation
+    virtual wxWindow *GetEditableWindow() = 0;
+
 
     // class which should be used to temporarily disable text change events
     //
@@ -196,6 +215,9 @@ private:
 
     // if this counter is non-null, events are blocked
     unsigned m_eventsBlock;
+
+    // hint-related stuff, only allocated if/when SetHint() is used
+    wxTextEntryHintData *m_hintData;
 };
 
 #ifdef __WXUNIVERSAL__