X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0ec1179b86dac6c87ad9f2cd126f87e92642c62c..8a3f03ffce938a24ecc154b614072457b3900ed0:/src/common/textentrycmn.cpp

diff --git a/src/common/textentrycmn.cpp b/src/common/textentrycmn.cpp
index 67443dcdad..cb81ea0779 100644
--- a/src/common/textentrycmn.cpp
+++ b/src/common/textentrycmn.cpp
@@ -26,25 +26,137 @@
 #if wxUSE_TEXTCTRL || wxUSE_COMBOBOX
 
 #ifndef WX_PRECOMP
+    #include "wx/window.h"
+    #include "wx/dataobj.h"
 #endif //WX_PRECOMP
 
 #include "wx/textentry.h"
+#include "wx/clipbrd.h"
+
+// ----------------------------------------------------------------------------
+// wxTextEntryHintData
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_CORE wxTextEntryHintData wxBIND_OR_CONNECT_HACK_ONLY_BASE_CLASS
+{
+public:
+    wxTextEntryHintData(wxTextEntryBase *entry, wxWindow *win)
+        : m_entry(entry),
+          m_win(win)
+    {
+        wxBIND_OR_CONNECT_HACK(win, wxEVT_SET_FOCUS, wxFocusEventHandler,
+                                wxTextEntryHintData::OnSetFocus, this);
+        wxBIND_OR_CONNECT_HACK(win, wxEVT_KILL_FOCUS, wxFocusEventHandler,
+                                wxTextEntryHintData::OnKillFocus, this);
+
+        // we don't have any hint yet
+        m_showsHint = false;
+    }
+
+    // default dtor is ok
+
+    // are we showing the hint right now?
+    bool ShowsHint() const { return m_showsHint; }
+
+    void SetHintString(const wxString& hint)
+    {
+        m_hint = hint;
+
+        if ( m_showsHint )
+        {
+            // update it immediately
+            m_entry->ChangeValue(hint);
+        }
+        //else: the new hint will be shown later
+    }
+
+    const wxString& GetHintString() const { return m_hint; }
+
+private:
+    void OnSetFocus(wxFocusEvent& event)
+    {
+        // hide the hint if we were showing it
+        if ( m_showsHint )
+        {
+            // Clear() would send an event which we don't want, so do it like
+            // this
+            m_entry->ChangeValue(wxString());
+            m_win->SetForegroundColour(m_colFg);
+
+            m_showsHint = false;
+        }
+
+        event.Skip();
+    }
+
+    void OnKillFocus(wxFocusEvent& event)
+    {
+        // restore the hint if the user didn't do anything in the control
+        if ( m_entry->IsEmpty() )
+        {
+            m_entry->ChangeValue(m_hint);
+
+            m_colFg = m_win->GetForegroundColour();
+            m_win->SetForegroundColour(*wxLIGHT_GREY);
+
+            m_showsHint = true;
+        }
+
+        event.Skip();
+    }
+
+    // the text control we're associated with (as its interface and its window)
+    wxTextEntryBase * const m_entry;
+    wxWindow * const m_win;
+
+    // the original foreground colour of m_win before we changed it
+    wxColour m_colFg;
+
+    // the hint passed to wxTextEntry::SetHint()
+    wxString m_hint;
+
+    // true if we're currently showing it, for this we must be empty and not
+    // have focus
+    bool m_showsHint;
+
+    wxDECLARE_NO_COPY_CLASS(wxTextEntryHintData);
+};
 
 // ============================================================================
 // wxTextEntryBase implementation
 // ============================================================================
 
+wxTextEntryBase::~wxTextEntryBase()
+{
+    delete m_hintData;
+}
+
+// ----------------------------------------------------------------------------
+// text accessors
+// ----------------------------------------------------------------------------
+
+wxString wxTextEntryBase::GetValue() const
+{
+    return m_hintData && m_hintData->ShowsHint() ? wxString() : DoGetValue();
+}
+
 wxString wxTextEntryBase::GetRange(long from, long to) const
 {
     wxString sel;
-    if ( from < to )
+    wxString value = GetValue();
+
+    if ( from < to && (long)value.length() >= to )
     {
-        sel = GetValue().substr(from, to - from);
+        sel = value.substr(from, to - from);
     }
 
     return sel;
 }
 
+// ----------------------------------------------------------------------------
+// text operations
+// ----------------------------------------------------------------------------
+
 void wxTextEntryBase::AppendText(const wxString& text)
 {
     SetInsertionPointEnd();
@@ -57,6 +169,8 @@ void wxTextEntryBase::DoSetValue(const wxString& value, int flags)
 
     SelectAll();
     WriteText(value);
+
+    SetInsertionPoint(0);
 }
 
 void wxTextEntryBase::Replace(long from, long to, const wxString& value)
@@ -66,9 +180,14 @@ void wxTextEntryBase::Replace(long from, long to, const wxString& value)
         Remove(from, to);
     }
 
+    SetInsertionPoint(from);
     WriteText(value);
 }
 
+// ----------------------------------------------------------------------------
+// selection
+// ----------------------------------------------------------------------------
+
 bool wxTextEntryBase::HasSelection() const
 {
     long from, to;
@@ -77,6 +196,14 @@ bool wxTextEntryBase::HasSelection() const
     return from < to;
 }
 
+void wxTextEntryBase::RemoveSelection()
+{
+    long from, to;
+    GetSelection(& from, & to);
+    if (from != -1 && to != -1)
+        Remove(from, to);
+}
+
 wxString wxTextEntryBase::GetStringSelection() const
 {
     long from, to;
@@ -85,6 +212,10 @@ wxString wxTextEntryBase::GetStringSelection() const
     return GetRange(from, to);
 }
 
+// ----------------------------------------------------------------------------
+// clipboard
+// ----------------------------------------------------------------------------
+
 bool wxTextEntryBase::CanCopy() const
 {
     return HasSelection();
@@ -97,7 +228,41 @@ bool wxTextEntryBase::CanCut() const
 
 bool wxTextEntryBase::CanPaste() const
 {
-    return IsEditable();
+    if ( IsEditable() )
+    {
+#if wxUSE_CLIPBOARD
+        // check if there is any text on the clipboard
+        if ( wxTheClipboard->IsSupported(wxDF_TEXT)
+#if wxUSE_UNICODE
+                || wxTheClipboard->IsSupported(wxDF_UNICODETEXT)
+#endif // wxUSE_UNICODE
+           )
+        {
+            return true;
+        }
+#endif // wxUSE_CLIPBOARD
+    }
+
+    return false;
+}
+
+// ----------------------------------------------------------------------------
+// hints support
+// ----------------------------------------------------------------------------
+
+bool wxTextEntryBase::SetHint(const wxString& hint)
+{
+    if ( !m_hintData )
+        m_hintData = new wxTextEntryHintData(this, GetEditableWindow());
+
+    m_hintData->SetHintString(hint);
+
+    return true;
+}
+
+wxString wxTextEntryBase::GetHint() const
+{
+    return m_hintData ? m_hintData->GetHintString() : wxString();
 }
 
 #endif // wxUSE_TEXTCTRL || wxUSE_COMBOBOX