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Implementing a custom CAknQueryDialog dialog

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[[Category:Symbian C++]][[Category:Code Examples]][[Category:Touch UI]][[Category:UI]][[Category:Code Snippet]]
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|platform=S60 3rd Edition, S60 5th Edition
 
|platform=S60 3rd Edition, S60 5th Edition
 
|devices=Nokia 5800 XpressMusic
 
|devices=Nokia 5800 XpressMusic
|category=Symbian C++
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|creationdate=20081031
|subcategory=Touch UI, UI
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|creationdate=October 31, 2008
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|keywords=CAknQueryDialog
 
|keywords=CAknQueryDialog
 
 
|sourcecode= <!-- Link to example source code (e.g. [[Media:The Code Example ZIP.zip]]) -->
 
|sourcecode= <!-- Link to example source code (e.g. [[Media:The Code Example ZIP.zip]]) -->
 
|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
 
|installfile= <!-- Link to installation file (e.g. [[Media:The Installation File.sis]]) -->
 
|sdk=<!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
 
|sdk=<!-- SDK(s) built and tested against (e.g. [http://linktosdkdownload/ Nokia Qt SDK 1.1]) -->
|devicecompatability=<!-- Compatible devices (e.g.: All* (must have GPS) ) -->
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|devicecompatability=All S60 3rd Edition and later
|signing=<!-- Empty or one of Self-Signed, DevCert, Manufacturer -->
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|signing=Self-Signed
|capabilities=<!-- Capabilities required (e.g. Location, NetworkServices. -->)
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|author=[[User:Tepaa]]
 
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==Overview==
 
==Overview==
  
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This snippet can be self-signed.
 
This snippet can be self-signed.
 
  
 
==MMP file==
 
==MMP file==
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The custom dialog is shown for two seconds.
 
The custom dialog is shown for two seconds.
 
[[Category:Symbian C++]][[Category:Code Examples]][[Category:Touch UI]][[Category:UI]][[Category:Code Snippet]]
 

Revision as of 07:25, 19 October 2011


Template:KBCS

Article Metadata
Tested with
Devices(s): Nokia 5800 XpressMusic
Compatibility
Device(s): All S60 3rd Edition and later
Platform Security
Signing Required: Self-Signed
Capabilities: None
Article
Keywords: CAknQueryDialog
Created: tepaa (31 Oct 2008)
Last edited: hamishwillee (19 Oct 2011)

Overview

This snippet shows how to implement a custom dialog. In this case the dialog acts like an application splash screen. The dialog closes itself after two seconds and the application continues to run.

This snippet can be self-signed.

MMP file

The following capabilities and libraries are required:

CAPABILITY  None       
 
LIBRARY avkon.lib
LIBRARY eikcoctl.lib
LIBRARY eikdlg.lib
LIBRARY euser.lib


Header file

#include <aknquerydialog.h>
#include <e32std.h>
#include <e32base.h>
#include <eikbtgpc.h>
 
class CSplashScreenDialog : public CAknQueryDialog
{
public: // Construction
CSplashScreenDialog();
virtual ~CSplashScreenDialog();
void PreLayoutDynInitL();
void PostLayoutDynInitL();
TBool OkToExitL(TInt aButtonId);
 
private: // From base classes
void SizeChanged();
TInt CountComponentControls() const;
CCoeControl* ComponentControl(TInt aIndex) const;
void Draw( const TRect& /*aRect*/ ) const;
void SetSizeAndPosition(const TSize &aSize);
 
private: // Internal methods
void CalculatePositionAndSize();
static TInt HideDialog(TAny* aAny);
 
private: // Data
CPeriodic* iPeriodic;
};


Source file

#include "csplashscreendialog.h"
 
const TInt KShowTime(2000000);
 
CSplashScreenDialog::CSplashScreenDialog()
{
// Closes this dialog after KShowTime 2s
TRAPD(err,
iPeriodic = CPeriodic::NewL(CActive::EPriorityIdle);
);
if (!err)
{
iPeriodic->Start(KShowTime, KShowTime, TCallBack(HideDialog, this));
}
}
 
CSplashScreenDialog::~CSplashScreenDialog()
{
if (iPeriodic)
{
iPeriodic->Cancel();
}
delete iPeriodic;
}
 
void CSplashScreenDialog::PreLayoutDynInitL()
{
CAknQueryDialog::PreLayoutDynInitL();
SetEditableL(EFalse);
}
 
void CSplashScreenDialog::PostLayoutDynInitL()
{
// No CBA buttons
CEikButtonGroupContainer* cba = CEikButtonGroupContainer::Current();
cba->MakeVisible(EFalse);
 
// Calculate position of the dialog
CalculatePositionAndSize();
}
 
TBool CSplashScreenDialog::OkToExitL(TInt /*aButtonId*/)
{
return ETrue;
}
 
TInt CSplashScreenDialog::CountComponentControls() const
{
// No child components in this example
return(0);
}
 
CCoeControl* CSplashScreenDialog::ComponentControl(TInt /*aIndex*/) const
{
// No child components in this example
return NULL;
}
 
void CSplashScreenDialog::CalculatePositionAndSize()
{
// Set full screen
SetExtentToWholeScreen();
}
 
void CSplashScreenDialog::SetSizeAndPosition(const TSize &aSize)
{
CAknQueryDialog::SetSizeAndPosition( aSize );
CalculatePositionAndSize();
}
 
void CSplashScreenDialog::SizeChanged()
{
// Update screen
DrawNow();
}
 
void CSplashScreenDialog::Draw( const TRect& /*aRect*/ ) const
{
// Get the standard graphics context
CWindowGc& gc = SystemGc();
gc.SetPenStyle( CGraphicsContext::ENullPen );
gc.SetBrushColor( KRgbBlack);
gc.SetBrushStyle( CGraphicsContext::ESolidBrush );
 
// Clear screen
gc.Clear(Rect());
gc.SetBrushStyle( CGraphicsContext::ENullBrush );
 
// Draw round rect
gc.SetPenStyle( CGraphicsContext::ESolidPen );
gc.SetPenColor(KRgbWhite);
gc.DrawRect(Rect());
 
// TODO: Implement what you need
}
 
TInt CSplashScreenDialog::HideDialog(TAny* aAny)
{
CSplashScreenDialog* self = static_cast<CSplashScreenDialog*>( aAny );
 
// Cancel CPeriodic timer
self->iPeriodic->Cancel();
 
// Closes itself
TRAP_IGNORE(
self->TryExitL(1);
);
return KErrNone;
}


Custom dialog resurce

RESOURCE DIALOG r_custom_dialog
{
flags = EGeneralQueryFlags;
buttons = R_AVKON_SOFTKEYS_EMPTY;
}


Running the custom dialog

iSplashScreenDialog = new (ELeave) CSplashScreenDialog();
iSplashScreenDialog->ExecuteLD(R_CUSTOM_DIALOG);
// Execution continues here after dialog has hided itself
iSplashScreenDialog = NULL;


Postconditions

The custom dialog is shown for two seconds.

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