291 lines
11 KiB
C++
291 lines
11 KiB
C++
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//-----------------------------------------------------------------------------
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// Name: objref.cpp
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// Purpose: XML resources sample: Object references and ID ranges dialog
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// Author: David Hart, Vaclav Slavik
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// RCS-ID: $Id$
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// Copyright: (c) Vaclav Slavik
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// Licence: wxWindows licence
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//-----------------------------------------------------------------------------
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//-----------------------------------------------------------------------------
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// Standard wxWidgets headers
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//-----------------------------------------------------------------------------
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// For compilers that support precompilation, includes "wx/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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// For all others, include the necessary headers (this file is usually all you
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// need because it includes almost all "standard" wxWidgets headers)
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#ifndef WX_PRECOMP
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#include "wx/wx.h"
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#endif
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//-----------------------------------------------------------------------------
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// Header of this .cpp file
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//-----------------------------------------------------------------------------
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#include "objrefdlg.h"
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//-----------------------------------------------------------------------------
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// Remaining headers: Needed wx headers, then wx/contrib headers, then application headers
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//-----------------------------------------------------------------------------
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#include "wx/xrc/xmlres.h" // XRC XML resouces
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//-----------------------------------------------------------------------------
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// Public members
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//-----------------------------------------------------------------------------
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ObjrefDialog::ObjrefDialog(wxWindow* parent)
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{
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wxXmlResource::Get()->LoadDialog(this, parent, wxT("objref_dialog"));
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nb = XRCCTRL(*this, "objref_notebook", wxNotebook);
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wxCHECK_RET(nb, "failed to find objref_notebook");
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nb->Bind(wxEVT_COMMAND_NOTEBOOK_PAGE_CHANGED, &ObjrefDialog::OnNotebookPageChanged, this);
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iconspage_bound = false;
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calcpage_bound = false;
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}
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ObjrefDialog::~ObjrefDialog()
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{
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// Select page 0. Otherwise if the Calc page were selected, when it's removed the Icons page is selected
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// and sets the log target again in idle time, *after* myframe restores the old one!
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nb->ChangeSelection(0);
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}
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//-----------------------------------------------------------------------------
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// Private members (including the event handlers)
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//-----------------------------------------------------------------------------
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void ObjrefDialog::OnNotebookPageChanged( wxNotebookEvent &event )
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{
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switch(event.GetSelection())
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{
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case copy_page:
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{
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// This is a straight object reference to the first page
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// so change the text programmatically
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nb->SetPageText(copy_page, "Page 1 copy");
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wxNotebookPage *page = nb->GetPage(copy_page);
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wxTextCtrl *text = XRCCTRL(*page, "description_text", wxTextCtrl);
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text->ChangeValue(
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wxString("This is a duplicate of page 1, using an object reference. ")
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+ wxString("It was created by this very simple xml:\n\n")
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+ wxString("<object class=\"notebookpage\">\n\t<object_ref ref=\"page1\"/>\n")
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+ wxString("\t<label>Page 1 copy</label>\n</object>")
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+ wxString("\n\n(Then I'm cheating by inserting this text programmatically.)")
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);
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break;
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}
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case icons_page:
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{
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wxNotebookPage *page = nb->GetPage(icons_page);
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if (!iconspage_bound)
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{
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iconspage_bound = true;
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// We want to direct UpdateUI events for the ID range 'first_row' to OnUpdateUIFirst().
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// We could achieve this using first_row[0] and first_row[2], but what if a fourth
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// column were added? It's safer to use the 'typedefs' for the two ends of the range:
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page->Bind(wxEVT_UPDATE_UI, &ObjrefDialog::OnUpdateUIFirst,
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this, XRCID("first_row[start]"), XRCID("first_row[end]"));
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// Similarly for the other two rows
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page->Bind(wxEVT_UPDATE_UI, &ObjrefDialog::OnUpdateUISecond,
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this, XRCID("second_row[start]"), XRCID("second_row[end]"));
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page->Bind(wxEVT_UPDATE_UI, &ObjrefDialog::OnUpdateUIThird,
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this, XRCID("third_row[start]"), XRCID("third_row[end]"));
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}
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text = XRCCTRL(*page, "log_text", wxTextCtrl);
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if (text)
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delete wxLog::SetActiveTarget(new wxLogTextCtrl(text));
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break;
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}
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case calc_page:
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{
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wxNotebookPage *page = nb->GetPage(calc_page);
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if (!calcpage_bound)
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{
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calcpage_bound = true;
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// Bind the id ranges, using the [start] and [end] 'typedefs'
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page->Bind(wxEVT_COMMAND_BUTTON_CLICKED, &ObjrefDialog::OnNumeralClick,
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this, XRCID("digits[start]"), XRCID("digits[end]"));
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page->Bind(wxEVT_COMMAND_BUTTON_CLICKED, &ObjrefDialog::OnOperatorClick,
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this, XRCID("operators[start]"), XRCID("operators[end]"));
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}
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result_txt = XRCCTRL(*page, "result", wxTextCtrl);
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text = XRCCTRL(*page, "log_text", wxTextCtrl);
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if (text)
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delete wxLog::SetActiveTarget(new wxLogTextCtrl(text));
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ClearCalculator();
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break;
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}
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default: return;
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}
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}
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// There are undoubtedly simpler ways of doing all this, but we're demonstrating the use of ID ranges
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void ObjrefDialog::OnUpdateUIFirst(wxUpdateUIEvent& event)
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{
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// The checkbox with the XRCID 'check[0]' controls this row of icons
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wxCheckBox *chk = XRCCTRL(*(nb->GetPage(icons_page)), "check[0]", wxCheckBox);
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if (chk)
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event.Enable(chk->IsChecked());
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// Let's create a log-window entry
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static bool checked = true;
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if (chk->IsChecked() != checked)
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{
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checked = chk->IsChecked();
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wxLogMessage("Row one has been %s by check[0], XRCID = %i", checked ? "enabled" : "disabled", XRCID("check[0]"));
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wxLogMessage("XRCIDs: first_row[start] = %i, first_row[0] = %i, first_row[1] = %i, first_row[2] = %i, first_row[end] = %i",
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XRCID("first_row[start]"), XRCID("first_row[0]"), XRCID("first_row[1]"), XRCID("first_row[2]"), XRCID("first_row[end]"));
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}
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}
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void ObjrefDialog::OnUpdateUISecond(wxUpdateUIEvent& event)
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{
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// The checkbox with the XRCID 'check[1]' controls this row of icons
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wxCheckBox *chk = XRCCTRL(*(nb->GetPage(icons_page)), "check[1]", wxCheckBox);
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if (chk)
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event.Enable(chk->IsChecked());
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// Let's create a log-window entry
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static bool checked = true;
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if (chk->IsChecked() != checked)
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{
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checked = chk->IsChecked();
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wxLogMessage("Row two has been %s by check[1], XRCID = %i", checked ? "enabled" : "disabled", XRCID("check[1]"));
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wxLogMessage("XRCIDs: second_row[start] = %i, second_row[0] = %i, second_row[1] = %i, second_row[2] = %i, second_row[end] = %i",
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XRCID("second_row[start]"), XRCID("second_row[0]"), XRCID("second_row[1]"), XRCID("second_row[2]"), XRCID("second_row[end]"));
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}
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}
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void ObjrefDialog::OnUpdateUIThird(wxUpdateUIEvent& event)
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{
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// The checkbox with the XRCID 'check[2]' controls this row of icons
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wxCheckBox *chk = XRCCTRL(*(nb->GetPage(icons_page)), "check[2]", wxCheckBox);
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if (chk)
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event.Enable(chk->IsChecked());
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// Let's create a log-window entry
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static bool checked = true;
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if (chk->IsChecked() != checked)
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{
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checked = chk->IsChecked();
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wxLogMessage("Row three has been %s by check[2], XRCID = %i", checked ? "enabled" : "disabled", XRCID("check[2]"));
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wxLogMessage("XRCIDs: third_row[start] = %i, third_row[0] = %i, third_row[1] = %i, third_row[2] = %i, third_row[end] = %i",
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XRCID("third_row[start]"), XRCID("third_row[0]"), XRCID("third_row[1]"), XRCID("third_row[2]"), XRCID("third_row[end]"));
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}
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}
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void ObjrefDialog::OnNumeralClick(wxCommandEvent& event)
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{
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// See how the id range simplifies determining which numeral was clicked
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int digit = event.GetId() - XRCID("digits[start]");
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char c = '0' + digit;
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if (current==0 && previous==0)
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{
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// We're just starting a calculation, so get rid of the placeholder '0'
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result_txt->Clear();
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}
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else if (operator_expected == true)
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{
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// If we've just finished one calculation, and now a digit is entered, clear
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ClearCalculator();
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result_txt->Clear();
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}
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(*result_txt) << c;
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current = current*10 + digit;
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wxLogMessage("You clicked digits[%c], XRCID %i", c, event.GetId());
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}
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void ObjrefDialog::OnOperatorClick(wxCommandEvent& event)
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{
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static const char symbols[] = "+-*/=";
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operator_expected = false;
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int ID = event.GetId() - XRCID("operators[start]");
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// We carefully used "operators[end]" as the name of the Clear button
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if (event.GetId() == XRCID("operators[end]"))
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{
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wxLogMessage("You clicked operators[%i], XRCID %i, 'Clear'", ID, event.GetId());
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return ClearCalculator();
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}
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switch(ID)
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{
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case operator_plus:
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case operator_minus:
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case operator_multiply:
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case operator_divide:
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if (current!=0 || previous!=0)
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{
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// We're in the middle of a complex calculation, so do the first bit
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Calculate();
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}
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curr_operator = (CalcOperator)ID;
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break;
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case operator_equals:
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Calculate();
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wxLogMessage("You clicked operators[%i], XRCID %i, giving a '%c'", ID, event.GetId(), symbols[ID]);
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curr_operator = operator_equals;
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// Flag that the next entry should be an operator, not a digit
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operator_expected = true;
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return;
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}
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(*result_txt) << ' ' << symbols[ID] << ' ';
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wxLogMessage("You clicked operators[%i], XRCID %i, giving a '%c'", ID, event.GetId(), symbols[ID]);
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}
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void ObjrefDialog::Calculate()
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{
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switch(curr_operator)
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{
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case operator_plus:
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previous += current; break;
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case operator_minus:
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previous -= current; break;
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case operator_multiply:
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previous *= current; break;
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case operator_divide:
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if (current!=0)
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previous /= current;
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break;
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default: return;
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}
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curr_operator = operator_plus;
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current = 0;
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result_txt->Clear();
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(*result_txt) << previous;
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}
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void ObjrefDialog::ClearCalculator()
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{
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current = previous = 0;
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curr_operator = operator_plus;
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operator_expected = false;
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result_txt->ChangeValue("0");
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}
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