added wxTextEntry common base class for both wxTextCtrl and wxComboBox; refactor wxGTK code to put common parts of these classes in the base class; fixed some inconsistencies in the text control behaviour between platforms
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@48944 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
284
src/gtk/textentry.cpp
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284
src/gtk/textentry.cpp
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///////////////////////////////////////////////////////////////////////////////
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// Name: src/gtk/textentry.cpp
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// Purpose: wxTextEntry implementation for wxGTK
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// Author: Vadim Zeitlin
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// Created: 2007-09-24
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// RCS-ID: $Id$
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// Copyright: (c) 2007 Vadim Zeitlin <vadim@wxwindows.org>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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// for compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#ifndef WX_PRECOMP
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#endif //WX_PRECOMP
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#include "wx/textentry.h"
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#include "wx/gtk/private.h"
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// ============================================================================
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// signal handlers implementation
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// ============================================================================
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extern "C"
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{
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// "insert_text" handler for GtkEntry
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static void
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wx_gtk_insert_text_callback(GtkEditable *editable,
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const gchar *new_text,
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gint new_text_length,
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gint *position,
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wxTextEntry *text)
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{
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// we should only be called if we have a max len limit at all
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GtkEntry *entry = GTK_ENTRY (editable);
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wxCHECK_RET( entry->text_max_length, _T("shouldn't be called") );
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// check that we don't overflow the max length limit
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//
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// FIXME: this doesn't work when we paste a string which is going to be
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// truncated
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if ( entry->text_length == entry->text_max_length )
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{
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// we don't need to run the base class version at all
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g_signal_stop_emission_by_name (editable, "insert_text");
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text->SendMaxLenEvent();
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}
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}
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} // extern "C"
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// ============================================================================
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// wxTextEntry implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// text operations
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// ----------------------------------------------------------------------------
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void wxTextEntry::WriteText(const wxString& value)
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{
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GtkEditable * const edit = GetEditable();
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// remove the selection if there is one and suppress the text change event
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// generated by this: we only want to generate one event for this change,
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// not two
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{
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EventsSuppressor noevents(this);
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gtk_editable_delete_selection(edit);
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}
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// insert new text at the cursor position
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gint len = gtk_editable_get_position(edit);
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gtk_editable_insert_text
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(
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edit,
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wxGTK_CONV_FONT(value, GetEditableWindow()->GetFont()),
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-1, // text: length: compute it using strlen()
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&len // will be updated to position after the text end
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);
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// and move cursor to the end of new text
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gtk_editable_set_position(edit, len);
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}
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wxString wxTextEntry::GetValue() const
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{
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const wxGtkString value(gtk_editable_get_chars(GetEditable(), 0, -1));
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return wxGTK_CONV_BACK_FONT(value, GetEditableWindow()->GetFont());
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}
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void wxTextEntry::Remove(long from, long to)
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{
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gtk_editable_delete_text(GetEditable(), from, to);
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}
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// ----------------------------------------------------------------------------
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// clipboard operations
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// ----------------------------------------------------------------------------
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void wxTextEntry::Copy()
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{
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gtk_editable_copy_clipboard(GetEditable());
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}
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void wxTextEntry::Cut()
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{
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gtk_editable_cut_clipboard(GetEditable());
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}
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void wxTextEntry::Paste()
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{
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gtk_editable_paste_clipboard(GetEditable());
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}
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// ----------------------------------------------------------------------------
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// undo/redo
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// ----------------------------------------------------------------------------
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void wxTextEntry::Undo()
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{
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// TODO: not implemented
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}
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void wxTextEntry::Redo()
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{
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// TODO: not implemented
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}
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bool wxTextEntry::CanUndo() const
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{
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return false;
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}
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bool wxTextEntry::CanRedo() const
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{
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return false;
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}
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// ----------------------------------------------------------------------------
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// insertion point
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// ----------------------------------------------------------------------------
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void wxTextEntry::SetInsertionPoint(long pos)
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{
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gtk_editable_set_position(GetEditable(), pos);
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}
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long wxTextEntry::GetInsertionPoint() const
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{
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return gtk_editable_get_position(GetEditable());
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}
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long wxTextEntry::GetLastPosition() const
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{
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// this can't be implemented for arbitrary GtkEditable so only do it for
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// GtkEntries
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GtkEntry * const entry = GTK_ENTRY(GetEditable());
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return entry ? entry->text_length : - 1;
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}
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// ----------------------------------------------------------------------------
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// selection
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// ----------------------------------------------------------------------------
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void wxTextEntry::SetSelection(long from, long to)
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{
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gtk_editable_select_region(GetEditable(), from, to);
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}
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void wxTextEntry::GetSelection(long *from, long *to) const
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{
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gint start, end;
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if ( gtk_editable_get_selection_bounds(GetEditable(), &start, &end) )
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{
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// the output must always be in order, although in GTK+ it isn't
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if ( start > end )
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{
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gint tmp = start;
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start = end;
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end = tmp;
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}
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}
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else // no selection
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{
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// for compatibility with MSW return the empty selection at cursor
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start =
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end = GetInsertionPoint();
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}
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if ( from )
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*from = start;
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if ( to )
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*to = end;
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}
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// ----------------------------------------------------------------------------
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// editable status
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// ----------------------------------------------------------------------------
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bool wxTextEntry::IsEditable() const
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{
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return gtk_editable_get_editable(GetEditable());
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}
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void wxTextEntry::SetEditable(bool editable)
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{
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gtk_editable_set_editable(GetEditable(), editable);
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}
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// ----------------------------------------------------------------------------
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// max text length
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// ----------------------------------------------------------------------------
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void wxTextEntry::SetMaxLength(unsigned long len)
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{
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GtkEntry * const entry = GTK_ENTRY(GetEditable());
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if ( !entry )
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return;
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gtk_entry_set_max_length(entry, len);
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// there is a bug in GTK+ 1.2.x: "changed" signal is emitted even if we had
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// tried to enter more text than allowed by max text length and the text
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// wasn't really changed
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//
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// to detect this and generate TEXT_MAXLEN event instead of TEXT_CHANGED
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// one in this case we also catch "insert_text" signal
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//
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// when max len is set to 0 we disconnect our handler as it means that we
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// shouldn't check anything any more
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if ( len )
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{
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g_signal_connect
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(
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entry,
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"insert_text",
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G_CALLBACK(wx_gtk_insert_text_callback),
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this
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);
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}
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else // no max length
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{
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g_signal_handlers_disconnect_by_func
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(
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entry,
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(gpointer)wx_gtk_insert_text_callback,
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this
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);
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}
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}
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void wxTextEntry::SendMaxLenEvent()
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{
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// remember that the next changed signal is to be ignored to avoid
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// generating a dummy wxEVT_COMMAND_TEXT_UPDATED event
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//IgnoreNextTextUpdate();
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wxWindow * const win = const_cast<wxWindow *>(GetEditableWindow());
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wxCommandEvent event(wxEVT_COMMAND_TEXT_MAXLEN, win->GetId());
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event.SetEventObject(win);
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event.SetString(GetValue());
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win->GetEventHandler()->ProcessEvent(event);
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}
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