562 lines
12 KiB
C++
562 lines
12 KiB
C++
// File: flabel.cpp
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// Provides: class FLabel
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#include "fapplication.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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, 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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, emphasis(false)
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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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, 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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, emphasis(false)
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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();
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}
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// public methods of FLabel
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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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F_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 (fc::text_alignment 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 ( emphasis != on )
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emphasis = on;
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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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setHotkeyAccelerator();
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else
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delAccelerator();
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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();
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setHotkeyAccelerator();
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}
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}
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//----------------------------------------------------------------------
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void FLabel::hide()
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{
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short fg, bg;
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int size;
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char* blank;
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FWidget* parent_widget = getParentWidget();
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FWidget::hide();
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if ( parent_widget )
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{
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fg = parent_widget->getForegroundColor();
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bg = parent_widget->getBackgroundColor();
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}
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else
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{
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fg = wc.dialog_fg;
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bg = wc.dialog_bg;
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}
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setColor (fg, bg);
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size = getWidth();
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if ( size < 0 )
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return;
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try
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{
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blank = new char[size + 1];
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}
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catch (const std::bad_alloc& ex)
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{
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std::cerr << "not enough memory to alloc " << ex.what() << std::endl;
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return;
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}
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std::memset(blank, ' ', uLong(size));
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blank[getWidth()] = '\0';
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setPrintPos (1,1);
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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() != fc::LeftButton )
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return;
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if ( ! (isEnabled() && accel_widget) )
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{
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// send click to the parent widget
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if ( FWidget* parent = getParentWidget() )
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{
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int b = ev->getButton();
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const FPoint& tp = ev->getTermPos();
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const FPoint& p = parent->termToWidgetPos(tp);
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try
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{
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FMouseEvent* _ev = new FMouseEvent (fc::MouseDown_Event, p, tp, b);
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FApplication::sendEvent (parent, _ev);
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delete _ev;
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}
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catch (const std::bad_alloc& ex)
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{
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std::cerr << "not enough memory to alloc " << ex.what() << std::endl;
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return;
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}
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}
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return;
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}
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if ( ! accel_widget->hasFocus() )
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{
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// focus the accelerator widget
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FWidget* focused_widget = getFocusWidget();
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FFocusEvent out (fc::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 ( getStatusBar() )
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{
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accel_widget->getStatusBar()->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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if ( focused_widget && focused_widget->isWidget() )
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{
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FFocusEvent out (fc::FocusOut_Event);
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FApplication::queueEvent(focused_widget, &out);
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accel_widget->setFocus();
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focused_widget->redraw();
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accel_widget->redraw();
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FFocusEvent in (fc::FocusIn_Event);
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FApplication::sendEvent(accel_widget, &in);
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if ( getStatusBar() )
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{
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accel_widget->getStatusBar()->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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ev->accept();
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}
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//----------------------------------------------------------------------
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void FLabel::cb_accel_widget_destroyed (FWidget*, data_ptr)
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{
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accel_widget = 0;
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delAccelerator();
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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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FWidget* parent_widget = getParentWidget();
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unsetFocusable();
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if ( parent_widget )
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{
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setForegroundColor (parent_widget->getForegroundColor());
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setBackgroundColor (parent_widget->getBackgroundColor());
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}
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else
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{
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setForegroundColor (wc.dialog_fg);
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setBackgroundColor (wc.dialog_bg);
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}
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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 ( std::isalpha(hotkey) || std::isdigit(hotkey) )
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{
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addAccelerator (std::tolower(hotkey));
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addAccelerator (std::toupper(hotkey));
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// Meta + hotkey
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addAccelerator (fc::Fmkey_meta + std::tolower(hotkey));
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}
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else
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addAccelerator (getHotkey());
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}
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else
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delAccelerator();
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}
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//----------------------------------------------------------------------
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int FLabel::getAlignOffset (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 < getWidth() )
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return int((getWidth() - 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 < getWidth() )
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return getWidth() - length;
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else
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return 0;
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}
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return 0;
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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 align_offset )
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{
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int to_char;
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bool isActive, isNoUnderline;
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isActive = ((flags & fc::active) != 0);
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isNoUnderline = ((flags & fc::no_underline) != 0);
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if ( align_offset > 0 )
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print (FString(align_offset, ' ')); // leading spaces
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if ( length <= uInt(getWidth()) )
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to_char = int(length);
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else
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to_char = getWidth() - 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 ( ! std::iswprint(wint_t(line[z])) )
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{
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if ( ! isNewFont() && ( int(line[z]) < fc::NF_rev_left_arrow2
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|| int(line[z]) > fc::NF_check_mark ) )
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{
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line[z] = L' ';
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}
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}
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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, getBackgroundColor());
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else
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setColor();
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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(getWidth()) )
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{
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setColor (ellipsis_color, getBackgroundColor());
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print ("..");
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setColor();
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}
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else if ( align_offset + to_char < getWidth() )
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{
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int len = getWidth() - align_offset - to_char;
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print (FString(len, ' ')); // tailing spaces
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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, align_offset;
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if ( text.isNull() || text.isEmpty() )
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return;
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if ( isMonochron() )
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{
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setReverse(true);
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if ( hasEmphasis() )
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setBold(true);
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}
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if ( hasEmphasis() )
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setColor (emphasis_color, getBackgroundColor());
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else
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setColor();
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hotkeypos = -1;
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if ( multiline && getHeight() >= 2 )
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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(getHeight()) )
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{
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length = multiline_text[y].getLength();
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try
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{
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LabelText = new wchar_t[length + 1]();
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}
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catch (const std::bad_alloc& ex)
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{
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std::cerr << "not enough memory to alloc " << ex.what() << std::endl;
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return;
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}
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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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std::wcsncpy(dest, src, length);
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setPrintPos (1, 1 + int(y));
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if ( hotkeypos != -1 )
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{
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align_offset = getAlignOffset (int(length - 1));
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printLine (LabelText, length - 1, hotkeypos, align_offset);
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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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align_offset = getAlignOffset (int(length));
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printLine (LabelText, length, -1, align_offset);
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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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try
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{
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LabelText = new wchar_t[length + 1]();
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}
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catch (const std::bad_alloc& ex)
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{
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std::cerr << "not enough memory to alloc " << ex.what() << std::endl;
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return;
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}
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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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setPrintPos (1,1);
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align_offset = getAlignOffset (int(length));
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printLine (LabelText, length, hotkeypos, align_offset);
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delete[] LabelText;
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}
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if ( isMonochron() )
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{
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setReverse(false);
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if ( hasEmphasis() )
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setBold(false);
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}
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}
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