460 lines
10 KiB
C++
460 lines
10 KiB
C++
// File: flabel.cpp
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// Provides: class FLabel
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#include "fapp.h"
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#include "flabel.h"
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#include "fstatusbar.h"
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//----------------------------------------------------------------------
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// class FLabel
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//----------------------------------------------------------------------
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// constructors and destructor
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//----------------------------------------------------------------------
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FLabel::FLabel(FWidget* parent)
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: FWidget(parent)
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, multiline_text()
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, multiline(false)
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, text()
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, emphasis(0)
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, alignment(fc::alignLeft)
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, emphasis_color(wc.label_emphasis_fg)
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, ellipsis_color(wc.label_ellipsis_fg)
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, reverse_mode(false)
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, accel_widget(0)
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{
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init();
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}
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//----------------------------------------------------------------------
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FLabel::FLabel (const FString& txt, FWidget* parent)
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: FWidget(parent)
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, multiline_text()
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, multiline(false)
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, text(txt)
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, emphasis(0)
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, alignment(fc::alignLeft)
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, emphasis_color(wc.label_emphasis_fg)
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, ellipsis_color(wc.label_ellipsis_fg)
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, reverse_mode(false)
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, accel_widget(0)
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{
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init();
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setText(txt);
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}
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//----------------------------------------------------------------------
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FLabel::~FLabel() // destructor
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{
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delAccelerator (this);
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}
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// private methods of FLabel
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//----------------------------------------------------------------------
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void FLabel::init()
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{
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if ( isEnabled() )
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flags |= ACTIVE;
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unsetFocusable();
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foregroundColor = parentWidget()->getForegroundColor();
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backgroundColor = parentWidget()->getBackgroundColor();
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}
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//----------------------------------------------------------------------
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uChar FLabel::getHotkey()
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{
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uInt length;
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if ( text.isEmpty() )
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return 0;
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length = text.getLength();
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for (uInt i=0; i < length; i++)
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{
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try
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{
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if ( (i+1 < length) && (text[i] == '&') )
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return uChar(text[++i]);
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}
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catch (const std::out_of_range&)
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{
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return 0;;
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}
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}
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return 0;
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}
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//----------------------------------------------------------------------
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int FLabel::getHotkeyPos (wchar_t*& src, wchar_t*& dest, uInt length)
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{
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// find hotkey position in string
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// + generate a new string without the '&'-sign
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int hotkeypos = -1;
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wchar_t* txt = src;
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for (uInt i=0; i < length; i++)
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{
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if ( (i < length) && (txt[i] == L'&') && (hotkeypos == -1) )
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{
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hotkeypos = int(i);
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i++;
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src++;
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}
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*dest++ = *src++;
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}
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return hotkeypos;
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}
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//----------------------------------------------------------------------
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void FLabel::setHotkeyAccelerator()
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{
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int hotkey = getHotkey();
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if ( hotkey )
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{
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if ( isalpha(hotkey) || isdigit(hotkey) )
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{
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addAccelerator (tolower(hotkey), this);
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addAccelerator (toupper(hotkey), this);
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// Meta + hotkey
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addAccelerator (0x20000e0 + tolower(hotkey), this);
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}
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else
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addAccelerator (getHotkey(), this);
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}
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else
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delAccelerator(this);
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}
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//----------------------------------------------------------------------
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int FLabel::getXOffset(int length)
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{
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switch ( alignment )
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{
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case fc::alignLeft:
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return 0;
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case fc::alignCenter:
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if ( length < width )
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return int((width - length) / 2);
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else
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return 0;
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case fc::alignRight:
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if ( length < width )
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return width - length;
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else
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return 0;
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default:
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return 0;
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}
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}
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//----------------------------------------------------------------------
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void FLabel::printLine ( wchar_t*& line
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, uInt length
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, int hotkeypos
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, int xoffset )
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{
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int to_char;
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bool isActive, isNoUnderline;
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isActive = ((flags & ACTIVE) != 0);
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isNoUnderline = ((flags & NO_UNDERLINE) != 0);
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for (int x=0; x < xoffset; x++)
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print (' ');
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if ( length <= uInt(width) )
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to_char = int(length);
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else
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to_char = width - 2;
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if ( hasReverseMode() )
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setReverse(true);
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for (int z=0; z < to_char; z++)
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{
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if ( ! iswprint(wint_t(line[z])) )
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line[z] = L' ';
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if ( (z == hotkeypos) && isActive )
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{
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setColor (wc.label_hotkey_fg, wc.label_hotkey_bg);
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if ( ! isNoUnderline )
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setUnderline();
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print ( line[z] );
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if ( ! isNoUnderline )
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unsetUnderline();
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if ( hasEmphasis() )
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setColor (emphasis_color, backgroundColor);
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else
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setColor (foregroundColor, backgroundColor);
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}
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else
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print ( line[z] );
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}
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if ( length > uInt(width) )
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{
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setColor (ellipsis_color, backgroundColor);
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print ("..");
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setColor (foregroundColor, backgroundColor);
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}
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else
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{
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for (int x=xoffset+to_char; x < width; x++)
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print (' ');
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}
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if ( hasReverseMode() )
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setReverse(false);
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}
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//----------------------------------------------------------------------
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void FLabel::draw()
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{
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wchar_t* src;
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wchar_t* dest;
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wchar_t* LabelText;
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uInt length;
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int hotkeypos, xoffset;
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if ( text.isNull() || text.isEmpty() )
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return;
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if ( Encoding == fc::VT100 )
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unsetVT100altChar();
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setUpdateVTerm(false);
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if ( hasEmphasis() )
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setColor (emphasis_color, backgroundColor);
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else
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setColor (foregroundColor, backgroundColor);
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hotkeypos = -1;
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if ( multiline && height > 1 )
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{
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uInt y = 0;
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uInt text_lines = uInt(multiline_text.size());
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bool hotkey_printed = false;
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while ( y < text_lines && y < uInt(height) )
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{
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length = multiline_text[y].getLength();
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LabelText = new wchar_t[length+1];
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src = const_cast<wchar_t*>(multiline_text[y].wc_str());
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dest = const_cast<wchar_t*>(LabelText);
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if ( ! hotkey_printed )
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hotkeypos = getHotkeyPos(src, dest, length);
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else
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wcsncpy(dest, src, length);
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gotoxy (xpos+xmin-1, ypos+ymin-1+int(y));
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if ( hotkeypos != -1 )
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{
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xoffset = getXOffset (int(length-1));
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printLine (LabelText, length-1, hotkeypos, xoffset);
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hotkey_printed = true;
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hotkeypos = -1;
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}
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else
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{
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xoffset = getXOffset (int(length));
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printLine (LabelText, length, -1, xoffset);
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}
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y++;
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delete[] LabelText;
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}
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}
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else
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{
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length = text.getLength();
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LabelText = new wchar_t[length+1];
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src = const_cast<wchar_t*>(text.wc_str());
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dest = const_cast<wchar_t*>(LabelText);
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hotkeypos = getHotkeyPos (src, dest, length);
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if ( hotkeypos != -1 )
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length--;
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gotoxy (xpos+xmin-1, ypos+ymin-1);
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xoffset = getXOffset (int(length));
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printLine (LabelText, length, hotkeypos, xoffset);
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delete[] LabelText;
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}
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setUpdateVTerm(true);
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}
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// public methods of FLabel
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//----------------------------------------------------------------------
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void FLabel::hide()
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{
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int fg, bg;
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char* blank;
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FWidget::hide();
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fg = parentWidget()->getForegroundColor();
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bg = parentWidget()->getBackgroundColor();
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setColor (fg, bg);
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blank = new char[width+1];
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memset(blank, ' ', uLong(width));
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blank[width] = '\0';
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print (blank);
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delete[] blank;
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}
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//----------------------------------------------------------------------
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void FLabel::onMouseDown (FMouseEvent* ev)
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{
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if ( ev->getButton() != LeftButton )
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return;
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if ( ! isEnabled() || ! accel_widget )
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return;
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if ( ! accel_widget->hasFocus() )
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{
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FWidget* focused_widget = getFocusWidget();
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FFocusEvent out (FocusOut_Event);
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FApplication::queueEvent(focused_widget, &out);
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accel_widget->setFocus();
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if ( focused_widget )
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focused_widget->redraw();
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accel_widget->redraw();
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if ( statusBar() )
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{
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accel_widget->statusBar()->drawMessage();
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updateTerminal();
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flush_out();
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}
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}
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}
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//----------------------------------------------------------------------
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void FLabel::onAccel (FAccelEvent* ev)
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{
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if ( ! isEnabled() || ! accel_widget )
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return;
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if ( ! accel_widget->hasFocus() )
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{
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FWidget* focused_widget = static_cast<FWidget*>(ev->focusedWidget());
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FFocusEvent out (FocusOut_Event);
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FApplication::queueEvent(focused_widget, &out);
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accel_widget->setFocus();
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if ( focused_widget )
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focused_widget->redraw();
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accel_widget->redraw();
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if ( statusBar() )
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{
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accel_widget->statusBar()->drawMessage();
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updateTerminal();
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flush_out();
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}
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}
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ev->accept();
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}
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//----------------------------------------------------------------------
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void FLabel::cb_accel_widget_destroyed (FWidget*, void*)
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{
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accel_widget = 0;
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delAccelerator (this);
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}
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//----------------------------------------------------------------------
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void FLabel::setAccelWidget (FWidget* widget)
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{
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if ( widget )
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accel_widget = widget;
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accel_widget->addCallback
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(
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"destroy",
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_METHOD_CALLBACK (this, &FLabel::cb_accel_widget_destroyed)
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);
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}
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//----------------------------------------------------------------------
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void FLabel::setAlignment (uInt align)
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{
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if ( align != fc::alignLeft
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&& align != fc::alignCenter
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&& align != fc::alignRight )
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alignment = fc::alignLeft;
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else
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alignment = align;
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}
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//----------------------------------------------------------------------
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bool FLabel::setEmphasis (bool on)
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{
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if ( on )
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emphasis |= EMPHASIS;
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else
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emphasis &= ~EMPHASIS;
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return on;
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}
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//----------------------------------------------------------------------
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bool FLabel::setReverseMode (bool on)
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{
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if ( reverse_mode != on )
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reverse_mode = on;
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return on;
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}
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//----------------------------------------------------------------------
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bool FLabel::setEnable (bool on)
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{
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FWidget::setEnable(on);
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if ( on )
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{
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flags |= ACTIVE;
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setHotkeyAccelerator();
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}
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else
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{
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flags &= ~ACTIVE;
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delAccelerator (this);
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}
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return on;
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}
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//----------------------------------------------------------------------
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void FLabel::setNumber (long num)
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{
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setText(FString().setNumber(num));
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}
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//----------------------------------------------------------------------
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void FLabel::setText (const FString& txt)
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{
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text = txt;
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multiline_text = text.split("\r\n");
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if ( int(multiline_text.size()) > 1 )
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multiline = true;
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else
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multiline = false;
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if ( isEnabled() )
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{
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delAccelerator (this);
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setHotkeyAccelerator();
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}
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}
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