void CLCDStreamingText::RecalcTextBoxOrigins()
{
if (m_Objects.size() <= 1)
return;
// draw everyone to the left by the offset
int nOrgOffset = 0;
LCD_OBJECT_LIST::iterator it = m_Objects.begin();
while(it != m_Objects.end())
{
CLCDBase* pObject = *it;
CLCDText* pText = (CLCDText*)pObject;
assert(NULL != pObject);
pText->SetLogicalSize(pText->GetHExtent().cx, pText->GetHExtent().cy);
// string can be empty which generates zero logical space
//assert(pText->GetLogicalSize().cx);
//assert(pText->GetLogicalSize().cy);
POINT& ptOrigin = pText->GetLogicalOrigin();
if (nOrgOffset == 0)
{
nOrgOffset = pText->GetLogicalOrigin().x;
}
pText->SetLogicalOrigin(nOrgOffset, ptOrigin.y);
nOrgOffset += pText->GetHExtent().cx;
++it;
}
}
void CLCDStreamingText::ApplyOrigins(int nOffset)
{
// draw everyone to the left by the offset
LCD_OBJECT_LIST::iterator it = m_Objects.begin();
while(it != m_Objects.end())
{
CLCDBase* pObject = *it;
CLCDText* pText = (CLCDText*)pObject;
assert(NULL != pObject);
POINT& ptOrigin = pText->GetLogicalOrigin();
pText->SetLogicalOrigin(ptOrigin.x + nOffset, ptOrigin.y);
++it;
}
// If the active box is no longer visible,
// pop it off the push it to the end of the list
if (abs(m_pQueueHead->GetLogicalOrigin().x) >= m_pQueueHead->GetHExtent().cx)
{
m_Objects.pop_front();
m_Objects.push_back(m_pQueueHead);
RecalcTextBoxOrigins();
m_pQueueHead = (CLCDText*)*m_Objects.begin();
}
}
int CLCDStreamingText::AddText(LPCTSTR szText)
{
CLCDText* pText = new CLCDText;
pText->Initialize();
pText->SetText(szText);
pText->SetOrigin(GetOrigin().x, GetOrigin().y);
pText->SetLogicalOrigin(GetLogicalOrigin().x, GetLogicalOrigin().y);
pText->SetSize(GetWidth(), GetHeight());
pText->SetBackgroundMode(OPAQUE);
LOGFONT lf;
GetObject(m_hFont, sizeof(LOGFONT), &lf);
pText->SetFont(lf);
m_bRecalcExtent = TRUE;
m_Objects.push_back(pText);
if (NULL == m_pQueueHead)
{
m_pQueueHead = pText;
}
// return the zero-based index
return (int)(m_Objects.size()-1);
}
/****f* EZ.LCD.Wrapper/CEzLcd::AddText
* NAME
* HANDLE CEzLcd::AddText -- Add a text object to the LCD
* INPUTS
* type - specifies whether the text is static or
* scrolling. Possible types are: LG_SCROLLING_TEXT,
* LG_STATIC_TEXT
* size - size of the text. Choose between these three:
* LG_SMALL, LG_MEDIUM or LG_BIG.
* alignment - alignment of the text. Values are: DT_LEFT,
* DT_CENTER, DT_RIGHT.
* maxLengthPixels - max length in pixels of the text. If the text is
* longer and of type LG_STATIC_TEXT, it will be cut
* off. If the text is longer and of type
* LG_SCROLLING_TEXT, it will scroll.
* RETURN VALUE
* Handle for this object.
* SEE ALSO
* CEzLcd::AddIcon
* CEzLcd::AddProgressBar
******
*/
HANDLE CEzLcd::AddText(LGObjectType type, LGTextSize size, INT alignment, INT maxLengthPixels)
{
assert(LG_SCROLLING_TEXT == type || LG_STATIC_TEXT == type);
CLCDText* staticText;
CLCDStreamingText* streamingText;
INT boxHeight = LG_MEDIUM_FONT_TEXT_BOX_HEIGHT;
INT fontSize = LG_MEDIUM_FONT_SIZE;
INT localOriginY = LG_MEDIUM_FONT_LOGICAL_ORIGIN_Y;
switch (type)
{
case LG_SCROLLING_TEXT:
streamingText = new CLCDStreamingText();
assert(NULL != streamingText);
streamingText->Initialize();
streamingText->SetOrigin(0, 0);
streamingText->SetFontFaceName(_T("Tahoma"));
streamingText->SetAlignment(alignment);
streamingText->SetText(_T(" "));
streamingText->SetGapText(LG_SCROLLING_GAP_TEXT);
streamingText->SetSpeed(LG_SCROLLING_SPEED);
streamingText->SetScrollingStep(LG_SCROLLING_STEP);
streamingText->SetStartDelay(LG_SCROLLING_DELAY_MS);
if (LG_SMALL == size)
{
boxHeight = LG_SMALL_FONT_TEXT_BOX_HEIGHT;
fontSize = LG_SMALL_FONT_SIZE;
localOriginY = LG_SMALL_FONT_LOGICAL_ORIGIN_Y;
}
else if (LG_MEDIUM == size)
{
boxHeight = LG_MEDIUM_FONT_TEXT_BOX_HEIGHT;
fontSize = LG_MEDIUM_FONT_SIZE;
localOriginY = LG_MEDIUM_FONT_LOGICAL_ORIGIN_Y;
}
else if (LG_BIG == size)
{
streamingText->SetFontWeight(FW_BOLD);
boxHeight = LG_BIG_FONT_TEXT_BOX_HEIGHT;
fontSize = LG_BIG_FONT_SIZE;
localOriginY = LG_BIG_FONT_LOGICAL_ORIGIN_Y;
}
streamingText->SetSize(maxLengthPixels, boxHeight);
streamingText->SetFontPointSize(fontSize);
streamingText->SetLogicalOrigin(0, localOriginY);
streamingText->SetObjectType(LG_SCROLLING_TEXT);
AddObject(streamingText);
return streamingText;
break;
case LG_STATIC_TEXT:
staticText = new CLCDText();
assert(NULL != staticText);
staticText->Initialize();
staticText->SetOrigin(0, 0);
staticText->SetFontFaceName(_T("Tahoma"));
staticText->SetAlignment(alignment);
staticText->SetBackgroundMode(OPAQUE);
staticText->SetText(_T(" "));
if (LG_SMALL == size)
{
boxHeight = LG_SMALL_FONT_TEXT_BOX_HEIGHT;
fontSize = LG_SMALL_FONT_SIZE;
localOriginY = LG_SMALL_FONT_LOGICAL_ORIGIN_Y;
}
else if (LG_MEDIUM == size)
{
boxHeight = LG_MEDIUM_FONT_TEXT_BOX_HEIGHT;
fontSize = LG_MEDIUM_FONT_SIZE;
localOriginY = LG_MEDIUM_FONT_LOGICAL_ORIGIN_Y;
}
else if (LG_BIG == size)
{
staticText->SetFontWeight(FW_BOLD);
boxHeight = LG_BIG_FONT_TEXT_BOX_HEIGHT;
fontSize = LG_BIG_FONT_SIZE;
localOriginY = LG_BIG_FONT_LOGICAL_ORIGIN_Y;
}
staticText->SetSize(maxLengthPixels, boxHeight);
staticText->SetFontPointSize(fontSize);
staticText->SetLogicalOrigin(0, localOriginY);
staticText->SetObjectType(LG_STATIC_TEXT);
AddObject(staticText);
return staticText;
break;
default:
Printf(_T("ERROR: trying to add text object with undefined type\n"));
}
return NULL;
}
