TB10.1 Example Applications: examples/AppFramework/txtshell/txtstyl.cpp Source File

00001 // Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies).
-00002 // All rights reserved.
-00003 // This component and the accompanying materials are made available
-00004 // under the terms of "Eclipse Public License v1.0"
-00005 // which accompanies this distribution, and is available
-00006 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
-00007 //
-00008 // Initial Contributors:
-00009 // Nokia Corporation - initial contribution.
-00010 //
-00011 // Contributors:
-00012 //
-00013 // Description:
-00014 //
-00015 
-00016 #include "txtexamp.h"
-00017 
-00018 #include <txtrich.h>
-00019 
-00020 CStyleControl::~CStyleControl()
-00021         {
-00022         delete iTextView; // text view
-00023         delete iLayout; // layout
-00024         delete iRichText; // contained text object
-00025         delete iNormalCharFormatLayer; // char format layer
-00026         delete iNormalParaFormatLayer; // para format layer
-00027         }
-00028 
-00029 void CStyleControl::CreateNormalL()
-00030         {
-00031         // Create the "Normal" style 
-00032         // = the global format layers upon which all styles will be based.
-00033         // Use default formatting except for an increased left margin and line spacing.
-00034         CParaFormat* paraFormat=CParaFormat::NewLC();
-00035         TParaFormatMask paraFormatMask;
-00036         paraFormat->iLeftMarginInTwips=360;
-00037         paraFormatMask.SetAttrib(EAttLeftMargin);
-00038         paraFormat->iLineSpacingInTwips=300;
-00039         paraFormatMask.SetAttrib(EAttLineSpacing);
-00040         // Create the normal (global) style
-00041         iNormalParaFormatLayer=CParaFormatLayer::NewL(paraFormat,paraFormatMask);
-00042         CleanupStack::PopAndDestroy();  // paraFormat
-00043         TCharFormat charFormat;
-00044         TCharFormatMask charFormatMask;
-00045         charFormatMask.SetAttrib(EAttFontHeight);
-00046         iNormalCharFormatLayer=CCharFormatLayer::NewL(charFormat,charFormatMask); 
-00047         }
-00048 
-00049 void CStyleControl::CreateStylesL()
-00050         {
-00051         // Create two new styles, with names "Warning" and "ListBullet", 
-00052         // add some appropriate formatting and append them to a style list.
-00053         _LIT(KStyle,"Warning");
-00054         _LIT(KStyleTwo,"ListBullet");
-00055         CParaFormat* paraFormat=CParaFormat::NewLC();
-00056         TParaFormatMask paraFormatMask;
-00057         TCharFormat charFormat;
-00058         TCharFormatMask charFormatMask;
-00059         // Style 1 - "Warning style"
-00060         iStyleOne=CParagraphStyle::NewL(
-00061                 *iNormalParaFormatLayer,*iNormalCharFormatLayer); // Base it on the "normal" layers
-00062 
-00063         // Enclose text in a paragraph border
-00064         TParaBorder paraBorder;
-00065         paraBorder.iLineStyle=TParaBorder::ESolid;
-00066         paraBorder.iThickness=4; // border width
-00067         paraBorder.iColor=KRgbGray; // set border color to gray
-00068         paraBorder.iAutoColor=EFalse; // iColor overrides text color
-00069         paraFormat->SetParaBorderL(CParaFormat::EParaBorderTop,paraBorder);
-00070         paraFormat->SetParaBorderL(CParaFormat::EParaBorderBottom,paraBorder);
-00071         paraFormat->SetParaBorderL(CParaFormat::EParaBorderLeft,paraBorder);
-00072         paraFormat->SetParaBorderL(CParaFormat::EParaBorderRight,paraBorder);
-00073         paraFormatMask.SetAttrib(EAttTopBorder);
-00074         paraFormatMask.SetAttrib(EAttBottomBorder);
-00075         paraFormatMask.SetAttrib(EAttRightBorder);
-00076         paraFormatMask.SetAttrib(EAttLeftBorder);
-00077         iStyleOne->SetL(paraFormat,paraFormatMask); 
-00078         // Make it bold.
-00079         // First, get handle to style 1's character format layer
-00080         CCharFormatLayer* charStyleFormatLayer = iStyleOne->CharFormatLayer(); 
-00081         charFormat.iFontSpec.iFontStyle.SetStrokeWeight(EStrokeWeightBold);
-00082         charFormatMask.SetAttrib(EAttFontStrokeWeight);
-00083         // Set the style's character format layer
-00084         charStyleFormatLayer->SetL(charFormat,charFormatMask);
-00085         // Finally, set its name to "Warning"
-00086         iStyleOne->iName=KStyle;
-00087 
-00088         // Style 2 - "listbullet"
-00089         paraFormat->Strip(); // Clear paraformat ready for new style
-00090         paraFormatMask.ClearAll(); // Clear mask
-00091         iStyleTwo=CParagraphStyle::NewL(
-00092                 *iNormalParaFormatLayer,*iNormalCharFormatLayer);  // Base it on the "normal" layers
-00093         paraFormat->iBullet=new(ELeave)TBullet; 
-00094         paraFormat->iBullet->iHeightInTwips=480; // Size of bullet point character=480 twips
-00095         paraFormat->iBullet->iHangingIndent=ETrue; // Indent the rest of the paragraph from the bullet
-00096         paraFormatMask.SetAttrib(EAttBullet);
-00097         iStyleTwo->SetL(paraFormat,paraFormatMask); 
-00098         // Finally, set its name to "ListBullet"
-00099         iStyleTwo->iName=KStyleTwo;
-00100 
-00101         // Create style table and insert styles.
-00102         iStyleList=CStyleList::NewL();
-00103         RParagraphStyleInfo info1(iStyleOne);
-00104         RParagraphStyleInfo info2(iStyleTwo);
-00105         iStyleList->AppendL(&info1);
-00106         iStyleList->AppendL(&info2);
-00107         // Create rich text object based on normal layers, with the style table.
-00108         iRichText=CRichText::NewL(iNormalParaFormatLayer,iNormalCharFormatLayer,*iStyleList);
-00109         CleanupStack::PopAndDestroy();  // paraFormat
-00110 }
-00111 
-00112 void CStyleControl::UpdateModelL()
-00113         {
-00114         // Create all constant literal descriptors used in this function, 
-00115         // e.g. for message text
-00116         _LIT(KText1,"Some text using normal style");
-00117         _LIT(KText2,"Text in warning style - based on normal");
-00118         _LIT(KText3,"Text in list bullet style");
-00119         _LIT(KText4,"Some more text in list bullet style");
-00120         _LIT(KText5,"Some text in italics");
-00121         _LIT(KStatus0,"Initialised styles and view");
-00122         _LIT(KStatus1,"Normal");
-00123         _LIT(KStatus2,"Warning style");
-00124         _LIT(KStatus3,"List bullet style");
-00125         _LIT(KStatus4,"Character and paragraph formatting applied to styled text");
-00126         _LIT(KStatus5,"All specific formatting removed from third paragraph");
-00127         _LIT(KStatus6,"Inserted some normal text with specific formatting");
-00128         _LIT(KStatus7,"Applied a style (warning) to text, retaining specific formatting");
-00129         _LIT(KStatus8,"Reset();");
-00130         _LIT(KStatusDefault,"(overshot!!)");
-00131 
-00132                 
-00133         switch (Phase())
-00134                 {
-00135         // Apply paragraph styles
-00136         case 0:
-00137                 {
-00138                 // Create the global format layers on which all styles are based.
-00139                 CreateNormalL();        
-00140                 // Create text object and styles.
-00141                 CreateStylesL();        
-00142                 // Prerequisites for view - viewing rectangle
-00143                 iViewRect=Rect();
-00144                 iViewRect.Shrink(3,3);
-00145                 // context and device
-00146                 CWindowGc& gc=SystemGc(); // get graphics context
-00147                 CBitmapDevice* device=(CBitmapDevice*) (gc.Device()); // device
-00148                 // layout
-00149                 iLayout=CTextLayout::NewL(iRichText,iViewRect.Width()); // new layout
-00150                         // construct layout, giving width of viewing rectangle
-00151                 // text view
-00152                 iTextView=CTextView::NewL(iLayout, iViewRect,
-00153                         device,
-00154                         device,
-00155                         &Window(),
-00156                         0, // no window group
-00157                         &iCoeEnv->WsSession()
-00158                         );
-00159                 iFormObserver->NotifyStatus(KStatus0);
-00160                 break;
-00161                 }
-00162         case 1:
-00163                 // Set some character formatting - applied globally
-00164                 iCharFormatMask.SetAttrib(EAttFontStrokeWeight);  
-00165                 
-00166                 iCharFormat.iFontSpec.iFontStyle.SetStrokeWeight(EStrokeWeightBold);
-00167 
-00168                 // apply formatting - pos and length are irrelevent
-00169                 iRichText->ApplyCharFormatL(iCharFormat,iCharFormatMask, 0,0);
-00170                 
-00171                 // Insert a paragraph using the "normal" (default) formatting.
-00172                 iRichText->InsertL(0,KText1);
-00173                 iRichText->InsertL(iRichText->DocumentLength(),
-00174                         CEditableText::EParagraphDelimiter); 
-00175                 iFormObserver->NotifyStatus(KStatus1);
-00176                 break;
-00177         case 2:
-00178                 {
-00179                 // Insert a paragraph in "warning" style
-00180                 TInt length;
-00181                 TInt startPos;
-00182                 iRichText->InsertL(iRichText->DocumentLength(),KText2);
-00183                 iRichText->InsertL(iRichText->DocumentLength(),
-00184                         CEditableText::EParagraphDelimiter); 
-00185                 // Get start position of second paragraph
-00186                 startPos=iRichText->CharPosOfParagraph(length,1); // Not interested in length
-00187                 // Apply warning style to second paragraph - single character is enough
-00188                 iRichText->ApplyParagraphStyleL(*iStyleList->At(0).iStyle,startPos,1,
-00189                         CParagraphStyle::ERetainAllSpecificFormats);
-00190                 iFormObserver->NotifyStatus(KStatus2);
-00191                 break;
-00192                 }
-00193         case 3:
-00194         // Insert two paragraphs in list bullet style
-00195                 {
-00196                 TInt length;
-00197                 TInt startPos;
-00198                 // Insert some text in bullet point style
-00199                 iRichText->InsertL(iRichText->DocumentLength(),KText3);
-00200                 iRichText->InsertL(iRichText->DocumentLength(),
-00201                         CEditableText::EParagraphDelimiter); 
-00202                                 // end para
-00203                 iRichText->InsertL(iRichText->DocumentLength(),KText4);
-00204                 iRichText->InsertL(iRichText->DocumentLength(),
-00205                         CEditableText::EParagraphDelimiter);
-00206                                 // end para
-00207                 // Get start position and length of third paragraph
-00208                 startPos=iRichText->CharPosOfParagraph(length,2); // Interested in length
-00209                 // Apply list bullet style to 3rd and 4th paragraphs, 
-00210                 // from start of para 2, for length of para2 + 1 characters.
-00211                 iRichText->ApplyParagraphStyleL(*iStyleList->At(1).iStyle,startPos,length+1,
-00212                         CParagraphStyle::ERetainAllSpecificFormats);
-00213                 iFormObserver->NotifyStatus(KStatus3);
-00214                 break;
-00215                 }
-00216         case 4:
-00217                 // Apply character and paragraph formatting 
-00218                 // (underlining and right alignment) over a style
-00219                 {
-00220                 TInt startPos, length;
-00221                 // Get start pos and length of third paragraph
-00222                 startPos=iRichText->CharPosOfParagraph(length,2); 
-00223                 // set underlining
-00224                 TCharFormat charFormat;
-00225                 TCharFormatMask charFormatMask;
-00226                 charFormat.iFontPresentation.iUnderline=EUnderlineOn; 
-00227                 charFormatMask.SetAttrib(EAttFontUnderline); // interested in underlining
-00228                 // Apply character formatting, from start of para for para length 
-00229                 // minus one char (don't want trailing paragraph delimiter underlined)
-00230                 iRichText->ApplyCharFormatL(charFormat, charFormatMask,startPos,length-1);
-00231                 CParaFormat* paraFormat=CParaFormat::NewL();
-00232                 TParaFormatMask paraFormatMask;
-00233                 paraFormat->iHorizontalAlignment=CParaFormat::ERightAlign; 
-00234                 paraFormatMask.SetAttrib(EAttAlignment);
-00235                 // Apply right alignment to first paragraph. A single character is enough
-00236                 iRichText->ApplyParaFormatL(paraFormat, paraFormatMask,startPos,1);
-00237                 iFormObserver->NotifyStatus(KStatus4);
-00238                 delete paraFormat;
-00239                 break;
-00240                 }
-00241         case 5:
-00242                 // Remove all specific formatting from third para
-00243                 {
-00244                 TInt startPos, length;
-00245                 startPos=iRichText->CharPosOfParagraph(length,2); 
-00246                 // Remove all specific character formatting from the paragraph 
-00247                 iRichText->RemoveSpecificCharFormatL(startPos,length);
-00248                 // Remove all specific para formatting from the paragraph
-00249                 iRichText->RemoveSpecificParaFormatL(startPos,2);
-00250                 iFormObserver->NotifyStatus(KStatus5);
-00251                 break;
-00252                 }
-00253         case 6:
-00254                 // Insert text in italics at the end of the document
-00255                 {
-00256                 TCharFormat charFormat;
-00257                 TCharFormatMask charFormatMask;
-00258                 charFormat.iFontSpec.iFontStyle.SetPosture(EPostureItalic);     
-00259                 charFormatMask.SetAttrib(EAttFontPosture); // interested in italic
-00260                 // Set formatting for all text inserted at this position.
-00261                 iRichText->SetInsertCharFormatL(charFormat,charFormatMask,iRichText->DocumentLength());
-00262                 iRichText->InsertL(iRichText->DocumentLength(),KText5);
-00263                 iRichText->CancelInsertCharFormat(); // "Insert pending" state cancelled
-00264                 iRichText->InsertL(iRichText->DocumentLength(),
-00265                         CEditableText::EParagraphDelimiter); // add a para delimiter at end of paragraph
-00266                 iFormObserver->NotifyStatus(KStatus6);
-00267                 break;
-00268                 }
-00269         case 7:
-00270                 {
-00271                 // Apply a style to text added in previous case; retain all its specific formatting.
-00272                 TInt startPos, length;
-00273                 // Get any document position in the 5th paragraph. Not interested in length.
-00274                 startPos=iRichText->CharPosOfParagraph(length,4);
-00275                 iRichText->ApplyParagraphStyleL(*iStyleList->At(0).iStyle,startPos,1,
-00276                         CParagraphStyle::ERetainAllSpecificFormats);
-00277                 iFormObserver->NotifyStatus(KStatus7);
-00278                 break;
-00279                 }
-00280         case 8:
-00281                 //reset document
-00282                 iRichText->Reset();
-00283                 // message to say what we did
-00284                 iFormObserver->NotifyStatus(KStatus8);
-00285                 break;
-00286         default:
-00287                 iFormObserver->NotifyStatus(KStatusDefault);
-00288                 break;
-00289                 }
-00290         }
-00291 
-00292 void CStyleControl::Draw(const TRect& aRect) const
-00293         {
-00294         // draw surround
-00295         CGraphicsContext& gc=SystemGc(); // context to draw into
-00296         TRect rect=Rect(); // screen boundary
-00297         gc.DrawRect(rect); // outline screen boundary
-00298         rect.Shrink(1,1);
-00299         gc.SetPenColor(KRgbWhite);
-00300         gc.DrawRect(rect);
-00301         rect.Shrink(1,1);
-00302         gc.SetPenColor(KRgbBlack);
-00303         gc.DrawRect(rect);
-00304         // draw editable text - will work unless OOM
-00305         TInt err;
-00306         TRAP(err,iTextView->FormatTextL());
-00307         if (err) return;
-00308         TRAP(err,iTextView->DrawL(aRect));
-00309         }
-00310 
-