examples/Graphics/WS/Simple/Simple.cpp

/*
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modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this
  list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.
* Neither the name of Nokia Corporation nor the names of its contributors
  may be used to endorse or promote products derived from this software
  without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Description:  
*/


#include <w32std.h>
#include "Base.h"
#include "Simple.h"


//                              Implementation for derived window classes

//                                       CMainWindow implementation                                                     //

/****************************************************************************\
|       Function:       Constructor/Destructor for CMainWindow
|                               Doesn't do much, as most initialisation is done by the
|                               CWindow base class.
|       Input:          aClient         Client application that owns the window
\****************************************************************************/
CMainWindow::CMainWindow (CWsClient* aClient)
: CWindow (aClient)
        {
        }


CMainWindow::~CMainWindow ()
        {
        }


/****************************************************************************\
|       Function:       CMainWindow::Draw
|       Purpose:        Redraws the contents of CMainWindow within a given
|                               rectangle. As CMainWindow has no contents, it simply
|                               clears the redraw area. A blank window could be used here
|                               instead. The Clear() is needed because a redraw should
|                               always draw to every pixel in the redraw rectangle.
|       Input:          aRect   Rectangle that needs redrawing
|       Output:         None
\****************************************************************************/
void CMainWindow::Draw(const TRect& aRect)
        {
        CWindowGc* gc=SystemGc(); // get a gc
        gc->SetClippingRect(aRect); // clip outside this rect
        gc->Clear(aRect); // clear
        }

/****************************************************************************\
|       Function:       CMainWindow::HandlePointerEvent
|       Purpose:        Handles pointer events for CMainWindow.  Doesn't do
|                               anything here.
|       Input:          aPointerEvent   The pointer event
|       Output:         None
\****************************************************************************/
void CMainWindow::HandlePointerEvent (TPointerEvent& /*aPointerEvent*/)
        {
        }


//                                       CSmallWindow implementation


/****************************************************************************\
|       Function:       Constructor/Destructor for CSmallWindow
|                               Doesn't do much, as most initialisation is done by the
|                               CWindow base class.
|       Input:          aClient         Client application that owns the window
\****************************************************************************/

CSmallWindow::CSmallWindow (CWsClient* aClient)
: CWindow (aClient)
        {
        }


CSmallWindow::~CSmallWindow ()
        {
        iWindow.Close();
        }

/****************************************************************************\
|       Function:       CSmallWindow::Draw
|       Purpose:        Redraws the contents of CSmallWindow within a given
|                               rectangle.  CSmallWindow displays a square border around
|                               the edges of the window, and two diagonal lines between the
|                               corners.
|       Input:          aRect   Rectangle that needs redrawing
|       Output:         None
\****************************************************************************/
void CSmallWindow::Draw(const TRect& aRect)
        {
        // Drawing to a window is done using functions supplied by
        // the graphics context (CWindowGC), not the window.
        CWindowGc* gc=SystemGc(); // get a gc
        gc->SetClippingRect(aRect); // clip outside this rect
        gc->Clear(aRect); // clear
        TSize size=iWindow.Size();
        TInt width=size.iWidth;
        TInt height=size.iHeight;
        // Draw a square border
        gc->DrawLine(TPoint(0,0),TPoint(0,height-1));
        gc->DrawLine (TPoint (0, height-1), TPoint (width-1, height-1));
        gc->DrawLine(TPoint(width-1,height-1),TPoint(width-1,0));
        gc->DrawLine (TPoint (width-1, 0), TPoint (0, 0));
        // Draw a line between the corners of the window
        gc->DrawLine(TPoint(0,0),TPoint(width, height));
        gc->DrawLine (TPoint (0, height), TPoint (width, 0));
        }

/****************************************************************************\
|       Function:       CSmallWindow::HandlePointerEvent
|       Purpose:        Handles pointer events for CSmallWindow.  Doesn't do
|                               anything here.
|       Input:          aPointerEvent   The pointer event
|       Output:         None
\****************************************************************************/

void CSmallWindow::HandlePointerEvent (TPointerEvent& /*aPointerEvent*/)
        {
        }

//                                       CExampleWsClient implementation                                                //

CExampleWsClient* CExampleWsClient::NewL(const TRect& aRect)
        {
        // make new client
        CExampleWsClient* client=new (ELeave) CExampleWsClient(aRect);
        CleanupStack::PushL(client); // push, just in case
        client->ConstructL(); // construct and run
        CleanupStack::Pop();
        return client;
        }

/****************************************************************************\
|       Function:       Constructor/Destructor for CExampleWsClient
|                               Destructor deletes everything that was allocated by
|                               ConstructMainWindowL()
\****************************************************************************/

CExampleWsClient::CExampleWsClient(const TRect& aRect)
:iRect(aRect)
        {
        }

CExampleWsClient::~CExampleWsClient ()
        {
        delete iMainWindow;
        delete iSmallWindow;
        }


/****************************************************************************\
|       Function:       CExampleWsClient::ConstructMainWindowL()
|                               Called by base class's ConstructL
|       Purpose:        Allocates and creates all the windows owned by this client
|                               (See list of windows in CExampleWsCLient declaration).
\****************************************************************************/

void CExampleWsClient::ConstructMainWindowL()
        {
        iMainWindow=new (ELeave) CMainWindow(this);
        iMainWindow->ConstructL(iRect);
        iSmallWindow  = new (ELeave) CSmallWindow (this);
        iSmallWindow->ConstructL (TRect (TPoint (100, 75), TSize (50, 50)), iMainWindow);
                }


/****************************************************************************\
|       Function:       CExampleWsClient::RunL()
|                               Called by active scheduler when an even occurs
|       Purpose:        Processes events according to their type
|                               For key events: calls HandleKeyEventL() (global to client)
|                               For pointer event: calls HandlePointerEvent() for window
|                                  event occurred in.
\****************************************************************************/
void CExampleWsClient::RunL()
        {
        // get the event
        iWs.GetEvent(iWsEvent);
        TInt eventType=iWsEvent.Type();
        // take action on it
        switch (eventType)
                {
        // window-group related event types
        case EEventNull:
                break;
        case EEventKey:
                {
                TKeyEvent& keyEvent=*iWsEvent.Key(); // get key event
                HandleKeyEventL (keyEvent);
                break;
                }
        case EEventKeyUp:
        case EEventKeyDown:
        case EEventModifiersChanged:
        case EEventFocusLost:
        case EEventFocusGained:
        case EEventSwitchOn:
        case EEventPassword:
        case EEventWindowGroupsChanged:
        case EEventErrorMessage:
                break;
        // window related events
        case EEventPointer:
                {
                CWindow* window=(CWindow*)(iWsEvent.Handle()); // get window
                TPointerEvent& pointerEvent=*iWsEvent.Pointer();
                window->HandlePointerEvent (pointerEvent);

                break;
                }
        case EEventPointerEnter:
        case EEventPointerExit:
        case EEventPointerBufferReady:
        case EEventDragDrop:
                break;
        default:
                break;
                }
        IssueRequest(); // maintain outstanding request
        }

void CExampleWsClient::HandleKeyEventL(struct TKeyEvent& /*aKeyEvent*/)
        {
        }

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