250 lines
7.1 KiB
C
250 lines
7.1 KiB
C
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/*******************************************************************************
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*
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* (C) COPYRIGHT MICROSOFT CORPORATION, 1998
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*
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* TITLE: SLIDEDIT.H
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*
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* VERSION: 1.0
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*
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* AUTHOR: ShaunIv
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*
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* DATE: 1/10/2000
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*
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* DESCRIPTION: Encapsulate the slider and edit and preview control interaction
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*
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*******************************************************************************/
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#ifndef __SLIDEDIT_H_INCLUDED
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#define __SLIDEDIT_H_INCLUDED
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#include <windows.h>
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#include "vwiaset.h"
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class CSliderAndEdit
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{
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private:
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HWND m_hWndSlider;
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HWND m_hWndEdit;
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HWND m_hWndPreview;
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UINT m_nPreviewMessage;
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CValidWiaSettings *m_pValidWiaSettings;
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public:
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CSliderAndEdit(void)
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: m_hWndSlider(NULL),
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m_hWndEdit(NULL),
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m_hWndPreview(NULL),
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m_nPreviewMessage(0),
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m_pValidWiaSettings(NULL)
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{
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}
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bool Initialize( HWND hWndSlider, HWND hWndEdit, HWND hWndPreview, UINT nPreviewMessage, CValidWiaSettings *pValidWiaSettings )
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{
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//
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// Save all of these settings
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//
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m_hWndSlider = hWndSlider;
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m_hWndEdit = hWndEdit;
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m_hWndPreview = hWndPreview;
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m_pValidWiaSettings = pValidWiaSettings;
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m_nPreviewMessage = nPreviewMessage;
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//
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// Make sure these are valid
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//
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if (m_hWndSlider && m_hWndEdit && m_pValidWiaSettings)
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{
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//
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// Set up the slider
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//
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SendMessage( m_hWndSlider, TBM_SETRANGE, TRUE, MAKELONG( 0, m_pValidWiaSettings->GetItemCount()-1 ) );
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//
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// Set the control's values
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//
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SetValue( m_pValidWiaSettings->InitialValue() );
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//
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// Everything is OK
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//
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return true;
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}
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return false;
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}
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void SetValue( LONG nValue )
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{
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if (IsValid())
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{
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//
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// Get the index of the intial value and set the position of the slider
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//
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int nIndex = m_pValidWiaSettings->FindIndexOfItem( nValue );
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if (nIndex >= 0)
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{
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SendMessage( m_hWndSlider, TBM_SETPOS, TRUE, nIndex );
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}
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//
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// Set up the preview control
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//
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if (m_hWndPreview && m_nPreviewMessage)
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{
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SendMessage( m_hWndPreview, m_nPreviewMessage, 0, ConvertToPreviewRange(nValue) );
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}
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//
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// Set up the edit control
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//
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SetDlgItemInt( GetParent(m_hWndEdit), GetWindowLong(m_hWndEdit,GWL_ID), nValue, TRUE );
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}
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}
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void Restore(void)
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{
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if (IsValid())
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{
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SetValue( m_pValidWiaSettings->InitialValue() );
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}
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}
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bool ValidateEditControl(void)
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{
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BOOL bSuccess = FALSE;
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if (IsValid())
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{
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//
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// Get the current value
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//
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LONG nValue = static_cast<LONG>(GetDlgItemInt( GetParent(m_hWndEdit), GetWindowLong(m_hWndEdit,GWL_ID), &bSuccess, TRUE ));
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if (bSuccess)
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{
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//
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// Assume it isn't a valid value
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//
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bSuccess = FALSE;
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//
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// Check to see if the edit control has a legal value in it
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//
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LONG nTestValue = nValue;
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if (m_pValidWiaSettings->FindClosestValue(nTestValue))
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{
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if (nValue == nTestValue)
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{
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bSuccess = TRUE;
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}
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}
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}
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}
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return (bSuccess != FALSE);
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}
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bool IsValid(void) const
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{
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return (m_hWndSlider && m_hWndEdit && m_pValidWiaSettings);
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}
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LONG ConvertToPreviewRange(LONG nValue) const
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{
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if (IsValid())
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{
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//
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// Convert the value to the range 0...100
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//
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nValue = ((nValue-m_pValidWiaSettings->Min()) * 100) / (m_pValidWiaSettings->Max() - m_pValidWiaSettings->Min());
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}
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return nValue;
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}
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void HandleSliderUpdate(void)
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{
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WIA_PUSH_FUNCTION((TEXT("CSliderAndEdit::HandleSliderUpdate")));
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if (IsValid())
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{
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//
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// Find out what the current index is
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//
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int nIndex = static_cast<int>(SendMessage( m_hWndSlider, TBM_GETPOS, 0, 0 ));
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WIA_TRACE((TEXT("nIndex = %d"), nIndex ));
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//
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// Get the value at that index, if it is valid set the edit control's text
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//
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LONG nValue;
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if (m_pValidWiaSettings->GetItemAtIndex(nIndex,nValue))
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{
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WIA_TRACE((TEXT("nValue = %d"), nValue ));
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SetDlgItemInt( GetParent(m_hWndEdit), GetWindowLong(m_hWndEdit,GWL_ID), nValue, TRUE );
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}
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//
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// If the preview window is valid, send it a message
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//
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if (m_nPreviewMessage && m_hWndPreview)
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{
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SendMessage( m_hWndPreview, m_nPreviewMessage, 0, ConvertToPreviewRange(nValue) );
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}
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}
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}
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LONG GetValueFromCurrentPos(void)
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{
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WIA_PUSH_FUNCTION((TEXT("CSliderAndEdit::GetValueFromCurrentPos")));
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if (IsValid())
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{
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//
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// Find out what the current index is
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//
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int nIndex = static_cast<int>(SendMessage( m_hWndSlider, TBM_GETPOS, 0, 0 ));
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WIA_TRACE((TEXT("nIndex = %d"), nIndex ));
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//
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// Get the value at that index, if it is valid return it
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//
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LONG nValue;
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if (m_pValidWiaSettings->GetItemAtIndex(nIndex,nValue))
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{
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return nValue;
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}
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return m_pValidWiaSettings->Min();
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}
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return 0;
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}
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void HandleEditUpdate(void)
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{
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WIA_PUSH_FUNCTION((TEXT("CSliderAndEdit::HandleSliderUpdate")));
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if (IsValid())
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{
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//
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// Get the current value
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//
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BOOL bSuccess = FALSE;
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LONG nValue = static_cast<LONG>(GetDlgItemInt( GetParent(m_hWndEdit), GetWindowLong(m_hWndEdit,GWL_ID), &bSuccess, TRUE ));
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if (bSuccess)
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{
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//
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// Round it and send it to the slider control
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//
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if (m_pValidWiaSettings->FindClosestValue(nValue))
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{
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int nIndex = m_pValidWiaSettings->FindIndexOfItem( nValue );
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if (nIndex >= 0)
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{
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SendMessage( m_hWndSlider, TBM_SETPOS, TRUE, nIndex );
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}
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//
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// If the preview window is valid, send it a message
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//
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if (m_nPreviewMessage && m_hWndPreview)
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{
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SendMessage( m_hWndPreview, m_nPreviewMessage, 0, ConvertToPreviewRange(nValue) );
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}
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}
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}
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}
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}
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};
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#endif //__SLIDEDIT_H_INCLUDED
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