Add simple tests for Scintilla annotations to the stc sample.

Show how add, remove and clear annotations and also how to update the text
width when long annotations are added.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73463 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/stc/edit.cpp

@@ -28,6 +28,7 @@
 // need because it includes almost all 'standard' wxWidgets headers)
 #ifndef WX_PRECOMP
     #include "wx/wx.h"
+    #include "wx/textdlg.h"
 #endif
 
 //! wxWidgets headers
@@ -49,6 +50,8 @@
 // declarations
 //============================================================================
 
+// The (uniform) style used for the annotations.
+const int ANNOTATION_STYLE = wxSTC_STYLE_LASTPREDEFINED + 1;
 
 //============================================================================
 // implementation
@@ -93,6 +96,13 @@ BEGIN_EVENT_TABLE (Edit, wxStyledTextCtrl)
     EVT_MENU (myID_WRAPMODEON,         Edit::OnWrapmodeOn)
     EVT_MENU (myID_CHARSETANSI,        Edit::OnUseCharset)
     EVT_MENU (myID_CHARSETMAC,         Edit::OnUseCharset)
+    // annotations
+    EVT_MENU (myID_ANNOTATION_ADD,     Edit::OnAnnotationAdd)
+    EVT_MENU (myID_ANNOTATION_REMOVE,  Edit::OnAnnotationRemove)
+    EVT_MENU (myID_ANNOTATION_CLEAR,   Edit::OnAnnotationClear)
+    EVT_MENU (myID_ANNOTATION_STYLE_HIDDEN,   Edit::OnAnnotationStyle)
+    EVT_MENU (myID_ANNOTATION_STYLE_STANDARD, Edit::OnAnnotationStyle)
+    EVT_MENU (myID_ANNOTATION_STYLE_BOXED,    Edit::OnAnnotationStyle)
     // extra
     EVT_MENU (myID_CHANGELOWER,        Edit::OnChangeCase)
     EVT_MENU (myID_CHANGEUPPER,        Edit::OnChangeCase)
@@ -157,7 +167,10 @@ Edit::Edit (wxWindow *parent, wxWindowID id,
     MarkerDefine (wxSTC_MARKNUM_FOLDERMIDTAIL, wxSTC_MARK_EMPTY,     wxT("BLACK"), wxT("BLACK"));
     MarkerDefine (wxSTC_MARKNUM_FOLDERTAIL,    wxSTC_MARK_EMPTY,     wxT("BLACK"), wxT("BLACK"));
 
-    // miscelaneous
+    // annotations
+    AnnotationSetVisible(wxSTC_ANNOTATION_BOXED);
+
+    // miscellaneous
     m_LineNrMargin = TextWidth (wxSTC_STYLE_LINENUMBER, wxT("_999999"));
     m_FoldingMargin = 16;
     CmdKeyClear (wxSTC_KEY_TAB, 0); // this is done by the menu accelerator key
@@ -312,6 +325,79 @@ void Edit::OnUseCharset (wxCommandEvent &event) {
     SetCodePage (charset);
 }
 
+void Edit::OnAnnotationAdd(wxCommandEvent& WXUNUSED(event))
+{
+    const int line = GetCurrentLine();
+
+    wxString ann = AnnotationGetText(line);
+    ann = wxGetTextFromUser
+          (
+            wxString::Format("Enter annotation for the line %d", line),
+            "Edit annotation",
+            ann,
+            this
+          );
+    if ( ann.empty() )
+        return;
+
+    AnnotationSetText(line, ann);
+    AnnotationSetStyle(line, ANNOTATION_STYLE);
+
+    // Scintilla doesn't update the scroll width for annotations, even with
+    // scroll width tracking on, so do it manually.
+    const int width = GetScrollWidth();
+
+    // NB: The following adjustments are only needed when using
+    //     wxSTC_ANNOTATION_BOXED annotations style, but we apply them always
+    //     in order to make things simpler and not have to redo the width
+    //     calculations when the annotations visibility changes. In a real
+    //     program you'd either just stick to a fixed annotations visibility or
+    //     update the width when it changes.
+
+    // Take into account the fact that the annotation is shown indented, with
+    // the same indent as the line it's attached to.
+    int indent = GetLineIndentation(line);
+
+    // This is just a hack to account for the width of the box, there doesn't
+    // seem to be any way to get it directly from Scintilla.
+    indent += 3;
+
+    const int widthAnn = TextWidth(ANNOTATION_STYLE, ann + wxString(indent, ' '));
+
+    if (widthAnn > width)
+        SetScrollWidth(widthAnn);
+}
+
+void Edit::OnAnnotationRemove(wxCommandEvent& WXUNUSED(event))
+{
+    AnnotationSetText(GetCurrentLine(), wxString());
+}
+
+void Edit::OnAnnotationClear(wxCommandEvent& WXUNUSED(event))
+{
+    AnnotationClearAll();
+}
+
+void Edit::OnAnnotationStyle(wxCommandEvent& event)
+{
+    int style = 0;
+    switch (event.GetId()) {
+        case myID_ANNOTATION_STYLE_HIDDEN:
+            style = wxSTC_ANNOTATION_HIDDEN;
+            break;
+
+        case myID_ANNOTATION_STYLE_STANDARD:
+            style = wxSTC_ANNOTATION_STANDARD;
+            break;
+
+        case myID_ANNOTATION_STYLE_BOXED:
+            style = wxSTC_ANNOTATION_BOXED;
+            break;
+    }
+
+    AnnotationSetVisible(style);
+}
+
 void Edit::OnChangeCase (wxCommandEvent &event) {
     switch (event.GetId()) {
         case myID_CHANGELOWER: {
@@ -417,6 +503,12 @@ bool Edit::InitializePrefs (const wxString &name) {
     StyleSetBackground (wxSTC_STYLE_LINENUMBER, *wxWHITE);
     SetMarginWidth (m_LineNrID, 0); // start out not visible
 
+    // annotations style
+    StyleSetBackground(ANNOTATION_STYLE, wxColour(244, 220, 220));
+    StyleSetForeground(ANNOTATION_STYLE, *wxBLACK);
+    StyleSetSizeFractional(ANNOTATION_STYLE,
+            (StyleGetSizeFractional(wxSTC_STYLE_DEFAULT)*4)/5);
+
     // default fonts for all styles!
     int Nr;
     for (Nr = 0; Nr < wxSTC_STYLE_LASTPREDEFINED; Nr++) {