427 lines
10 KiB
C++
427 lines
10 KiB
C++
/***********************************************************************
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* flabel.cpp - Widget FLabel *
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* *
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* This file is part of the FINAL CUT widget toolkit *
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* *
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* Copyright 2014-2021 Markus Gans *
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* *
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* FINAL CUT is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU Lesser General Public License as *
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* published by the Free Software Foundation; either version 3 of *
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* the License, or (at your option) any later version. *
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* *
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* FINAL CUT is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU Lesser General Public *
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* License along with this program. If not, see *
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* <http://www.gnu.org/licenses/>. *
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***********************************************************************/
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#include <memory>
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#include <utility>
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#include "final/fapplication.h"
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#include "final/fcolorpair.h"
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#include "final/fevent.h"
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#include "final/flabel.h"
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#include "final/flog.h"
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#include "final/fstatusbar.h"
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namespace finalcut
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{
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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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{
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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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, text{txt}
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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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// FLabel operators
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//----------------------------------------------------------------------
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FLabel& FLabel::operator = (const FString& s)
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{
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setText(s);
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return *this;
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}
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//----------------------------------------------------------------------
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FLabel& FLabel::operator << (UniChar c)
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{
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setText(text + static_cast<wchar_t>(c));
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return *this;
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}
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//----------------------------------------------------------------------
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FLabel& FLabel::operator << (const wchar_t c)
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{
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setText(text + c);
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return *this;
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}
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//----------------------------------------------------------------------
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const FLabel& FLabel::operator >> (FString& s) const
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{
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s += text;
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return *this;
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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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this, &FLabel::cb_accelWidgetDestroyed
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);
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}
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//----------------------------------------------------------------------
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void FLabel::setAlignment (Align align)
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{
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if ( align != Align::Left
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&& align != Align::Center
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&& align != Align::Right )
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alignment = Align::Left;
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else
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alignment = align;
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}
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//----------------------------------------------------------------------
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void FLabel::resetColors()
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{
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useParentWidgetColor();
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const auto& wc = getColorTheme();
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emphasis_color = wc->label_emphasis_fg;
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ellipsis_color = wc->label_ellipsis_fg;
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}
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//----------------------------------------------------------------------
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bool FLabel::setEnable (bool enable)
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{
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FWidget::setEnable(enable);
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if ( enable )
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setHotkeyAccelerator();
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else
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delAccelerator();
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return enable;
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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.setString(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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FWidget::hide();
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hideArea (getSize());
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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() != MouseButton::Left )
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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 ( auto parent = getParentWidget() )
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{
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const auto b = ev->getButton();
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const auto& tp = ev->getTermPos();
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const auto& p = parent->termToWidgetPos(tp);
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const auto& _ev = \
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std::make_shared<FMouseEvent>(Event::MouseDown, p, tp, b);
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FApplication::sendEvent (parent, _ev.get());
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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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auto focused_widget = getFocusWidget();
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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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accel_widget->getStatusBar()->drawMessage();
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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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auto focused_widget = ev->focusedWidget();
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if ( focused_widget && focused_widget->isWidget() )
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{
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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 (Event::FocusIn);
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FApplication::sendEvent(accel_widget, &in);
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if ( getStatusBar() )
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accel_widget->getStatusBar()->drawMessage();
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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_accelWidgetDestroyed()
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{
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accel_widget = nullptr;
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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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unsetFocusable();
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resetColors();
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}
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//----------------------------------------------------------------------
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void FLabel::setHotkeyAccelerator()
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{
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setHotkeyViaString (this, text);
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}
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//----------------------------------------------------------------------
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std::size_t FLabel::getAlignOffset (const std::size_t length) const
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{
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const std::size_t width(getWidth());
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if ( alignment == Align::Center )
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{
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if ( length < width )
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return (width - length) / 2;
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}
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else if ( alignment == Align::Right && length < width )
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{
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return width - length;
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}
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return 0;
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}
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//----------------------------------------------------------------------
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void FLabel::draw()
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{
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if ( text.isEmpty() )
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return;
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if ( FTerm::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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// Draw the text
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if ( multiline && getHeight() >= 2 )
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drawMultiLine();
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else
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drawSingleLine();
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if ( FTerm::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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//----------------------------------------------------------------------
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void FLabel::drawMultiLine()
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{
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std::size_t y{0};
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const std::size_t text_lines = multiline_text.size();
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bool hotkey_printed{false};
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while ( y < text_lines && y < std::size_t(getHeight()) )
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{
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FString label_text{};
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hotkeypos = NOT_SET;
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const auto length = multiline_text[y].getLength();
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column_width = getColumnWidth(multiline_text[y]);
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if ( ! hotkey_printed )
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hotkeypos = finalcut::getHotkeyPos (multiline_text[y], label_text);
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else
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label_text = multiline_text[y];
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print() << FPoint{1, 1 + int(y)};
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if ( hotkeypos != NOT_SET )
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{
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align_offset = getAlignOffset(length - 1);
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hotkey_printed = true;
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}
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else
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align_offset = getAlignOffset(length);
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printLine (label_text);
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y++;
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}
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}
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//----------------------------------------------------------------------
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void FLabel::drawSingleLine()
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{
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FString label_text{};
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column_width = getColumnWidth(text);
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hotkeypos = finalcut::getHotkeyPos (text, label_text);
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if ( hotkeypos != NOT_SET )
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column_width--;
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print() << FPoint{1, 1};
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align_offset = getAlignOffset(column_width);
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printLine (label_text);
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}
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//----------------------------------------------------------------------
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void FLabel::printLine (FString& line)
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{
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std::size_t to_char{};
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std::size_t to_column{};
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const std::size_t width(getWidth());
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if ( align_offset > 0 )
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print (FString{align_offset, ' '}); // leading spaces
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if ( column_width <= width )
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{
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to_char = line.getLength();
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to_column = column_width;
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}
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else
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{
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to_column = ( width >= 2 ) ? width - 2 : 0;
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to_char = getLengthFromColumnWidth(line, to_column);
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}
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if ( hasReverseMode() )
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setReverse(true);
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for (std::size_t z{0}; z < to_char; z++)
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{
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if ( ! std::iswprint(std::wint_t(line[z]))
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&& ! FTerm::isNewFont()
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&& ( line[z] < UniChar::NF_rev_left_arrow2
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|| line[z] > UniChar::NF_check_mark ) )
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{
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line[z] = L' ';
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}
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if ( z == hotkeypos && getFlags().active )
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{
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const auto& wc = getColorTheme();
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setColor (wc->label_hotkey_fg, wc->label_hotkey_bg);
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if ( ! getFlags().no_underline )
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setUnderline();
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print (line[z]);
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if ( ! getFlags().no_underline )
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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 ( column_width > width )
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{
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// Print ellipsis
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print() << FColorPair{ellipsis_color, getBackgroundColor()}
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<< FString{".."}.left(width);
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setColor();
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}
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else if ( align_offset + to_column < width )
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{
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// Print trailing spaces
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const std::size_t len = width - align_offset - to_column;
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print (FString{len, ' '});
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}
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if ( hasReverseMode() )
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setReverse(false);
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}
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} // namespace finalcut
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