592 lines
16 KiB
C++
592 lines
16 KiB
C++
/***********************************************************************
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* mouse.cpp - A small mouse-controlled drawing program *
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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 2017-2020 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 <final/final.h>
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namespace fc = finalcut::fc;
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using finalcut::FColorPair;
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using finalcut::FRect;
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using finalcut::FPoint;
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using finalcut::FSize;
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//----------------------------------------------------------------------
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// class ColorChooser
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//----------------------------------------------------------------------
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class ColorChooser final : public finalcut::FWidget
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{
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public:
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// Constructor
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explicit ColorChooser (finalcut::FWidget* = nullptr);
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// Disable copy constructor
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ColorChooser (const ColorChooser&) = delete;
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// Destructor
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~ColorChooser() override = default;
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// Disable copy assignment operator (=)
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ColorChooser& operator = (const ColorChooser&) = delete;
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// Accessors
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FColor getForeground() const;
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FColor getBackground() const;
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private:
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// Mutator
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void setSize (const FSize&, bool = true) override;
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// Method
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void draw() override;
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void drawBorder() override;
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// Event handler
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void onMouseDown (finalcut::FMouseEvent*) override;
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// Data members
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FColor fg_color{fc::White};
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FColor bg_color{fc::Black};
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finalcut::FLabel headline{this};
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};
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//----------------------------------------------------------------------
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ColorChooser::ColorChooser (finalcut::FWidget* parent)
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: FWidget{parent}
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{
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FWidget::setSize (FSize{8, 12});
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setFixedSize (FSize{8, 12});
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unsetFocusable();
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// Text label
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headline.setGeometry (FPoint{1, 1}, FSize{8, 1});
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headline.setEmphasis();
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headline.setAlignment (fc::alignCenter);
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headline << "Color";
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}
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//----------------------------------------------------------------------
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inline FColor ColorChooser::getForeground() const
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{
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return fg_color;
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}
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//----------------------------------------------------------------------
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inline FColor ColorChooser::getBackground() const
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{
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return bg_color;
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}
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//----------------------------------------------------------------------
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void ColorChooser::setSize (const FSize& size, bool adjust)
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{
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// Avoids calling a virtual function from the constructor
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// (CERT, OOP50-CPP)
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FWidget::setSize (size, adjust);
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}
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//----------------------------------------------------------------------
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void ColorChooser::draw()
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{
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useParentWidgetColor();
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headline.setBackgroundColor(getBackgroundColor());
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setColor();
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drawBorder();
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for (FColor c{0}; c < 16; c++)
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{
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print() << FPoint{2 + (c / 8) * 3, 3 + c % 8};
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if ( c < 6 )
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setColor (fc::LightGray, c);
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else if ( c > 8 )
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setColor (fc::DarkGray, c);
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else
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setColor (fc::White, c);
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if ( c == bg_color )
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{
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print() << L' ' << wchar_t(fc::Times) << L' ';
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}
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else
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print (" ");
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}
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}
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//----------------------------------------------------------------------
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void ColorChooser::drawBorder()
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{
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finalcut::drawBorder (this, FRect{FPoint{1, 2}, FSize{8, 10}});
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}
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//----------------------------------------------------------------------
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void ColorChooser::onMouseDown (finalcut::FMouseEvent* ev)
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{
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const int mouse_x = ev->getX();
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const int mouse_y = ev->getY();
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if ( ev->getButton() == fc::MiddleButton )
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return;
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for (auto c{0}; c < 16; c++)
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{
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const int xmin = 2 + (c / 8) * 3;
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const int xmax = 4 + (c / 8) * 3;
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const int y = 3 + c % 8;
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if ( mouse_x >= xmin && mouse_x <= xmax && mouse_y == y )
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{
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if ( ev->getButton() == fc::LeftButton )
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bg_color = FColor(c);
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else if ( ev->getButton() == fc::RightButton )
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fg_color = FColor(c);
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redraw();
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emitCallback("clicked");
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}
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}
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}
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//----------------------------------------------------------------------
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// class Brushes
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//----------------------------------------------------------------------
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class Brushes final : public finalcut::FWidget
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{
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public:
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// Constructor
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explicit Brushes (finalcut::FWidget* = nullptr);
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// Disable copy constructor
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Brushes (const Brushes&) = delete;
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// Destructor
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~Brushes() override = default;
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// Disable copy assignment operator (=)
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Brushes& operator = (const Brushes&) = delete;
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// Accessor
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wchar_t getBrush() const;
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// Mutators
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void setForeground (FColor);
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void setBackground (FColor);
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private:
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// Mutator
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void setSize (const FSize&, bool = true) override;
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// Method
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void draw() override;
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void drawBorder() override;
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// Event handler
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void onMouseDown (finalcut::FMouseEvent*) override;
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// Data members
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wchar_t brush{L' '};
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FColor fg_color{fc::White};
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FColor bg_color{fc::Black};
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finalcut::FLabel headline{this};
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};
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//----------------------------------------------------------------------
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Brushes::Brushes (finalcut::FWidget* parent)
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: FWidget{parent}
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{
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FWidget::setSize (FSize{8, 4});
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setFixedSize (FSize{8, 4});
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unsetFocusable();
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// Text label
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headline.setGeometry(FPoint{1, 1}, FSize{8, 1});
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headline.setEmphasis();
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headline.setAlignment (fc::alignCenter);
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headline << "Brush";
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}
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//----------------------------------------------------------------------
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void Brushes::setSize (const FSize& size, bool adjust)
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{
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// Avoids calling a virtual function from the constructor
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// (CERT, OOP50-CPP)
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FWidget::setSize (size, adjust);
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}
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//----------------------------------------------------------------------
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void Brushes::draw()
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{
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int pos{0};
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useParentWidgetColor();
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headline.setBackgroundColor(getBackgroundColor());
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setColor();
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drawBorder();
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print() << FPoint{2, 3}
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<< FColorPair{fg_color, bg_color} << " "
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<< finalcut::FString{3, fc::MediumShade};
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if ( brush != L' ' )
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pos = 3;
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setColor();
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print() << FPoint{3 + pos, 2}
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<< fc::BlackDownPointingTriangle
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<< FPoint{3 + pos, 4}
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<< fc::BlackUpPointingTriangle;
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}
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//----------------------------------------------------------------------
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void Brushes::drawBorder()
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{
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finalcut::drawBorder (this, FRect{FPoint{1, 2}, FSize{8, 3}});
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}
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//----------------------------------------------------------------------
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void Brushes::onMouseDown (finalcut::FMouseEvent* ev)
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{
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const int mouse_x = ev->getX();
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const int mouse_y = ev->getY();
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if ( ev->getButton() != fc::LeftButton )
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return;
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if ( mouse_x >= 2 && mouse_x <= 4 && mouse_y == 3 )
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{
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brush = L' ';
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redraw();
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}
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else if ( mouse_x >= 5 && mouse_x <= 7 && mouse_y == 3 )
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{
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brush = fc::MediumShade;
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redraw();
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}
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}
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//----------------------------------------------------------------------
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inline wchar_t Brushes::getBrush() const
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{
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return brush;
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}
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//----------------------------------------------------------------------
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inline void Brushes::setForeground (FColor color)
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{
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fg_color = color;
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}
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//----------------------------------------------------------------------
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inline void Brushes::setBackground (FColor color)
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{
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bg_color = color;
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}
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//----------------------------------------------------------------------
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// class MouseDraw
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//----------------------------------------------------------------------
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class MouseDraw final : public finalcut::FDialog
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{
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public:
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// Using-declaration
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using FWidget::setGeometry;
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// Constructor
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explicit MouseDraw (finalcut::FWidget* = nullptr);
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// Disable copy constructor
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MouseDraw (const MouseDraw&) = delete;
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// Destructor
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~MouseDraw() override = default;
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// Disable copy assignment operator (=)
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MouseDraw& operator = (const MouseDraw&) = delete;
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// Methods
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void setGeometry (const FPoint&, const FSize&, bool = true) override;
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// Event handlers
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void onKeyPress (finalcut::FKeyEvent*) override;
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void onClose (finalcut::FCloseEvent*) override;
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private:
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// Methods
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void draw() override;
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void drawBrush (int, int, bool = false);
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void drawCanvas();
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void createCanvas();
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void adjustSize() override;
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// Event handler
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void onMouseDown (finalcut::FMouseEvent*) override;
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void onMouseMove (finalcut::FMouseEvent*) override;
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// Callback methods
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void cb_colorChanged();
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// Data members
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FTermArea* canvas{nullptr};
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ColorChooser c_chooser{this};
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Brushes brush{this};
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};
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//----------------------------------------------------------------------
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MouseDraw::MouseDraw (finalcut::FWidget* parent)
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: finalcut::FDialog{parent}
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{
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FDialog::setText ("Drawing with the mouse");
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c_chooser.setPos (FPoint{1, 1});
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c_chooser.addCallback
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(
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"clicked",
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this, &MouseDraw::cb_colorChanged
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);
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brush.setPos (FPoint{1, 12});
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}
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//----------------------------------------------------------------------
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void MouseDraw::setGeometry ( const FPoint& p, const FSize& s, bool adjust)
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{
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finalcut::FDialog::setGeometry (p, s, adjust);
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const std::size_t w = s.getWidth();
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const std::size_t h = s.getHeight();
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const finalcut::FRect scroll_geometry (FPoint{0, 0}, FSize{w - 11, h - 3});
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if ( ! canvas )
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return;
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const FSize no_shadow{0, 0};
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const int old_w = canvas->width;
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const int old_h = canvas->height;
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resizeArea (scroll_geometry, no_shadow, canvas);
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if ( old_w != canvas->width || old_h != canvas->height )
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{
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setColor(getForegroundColor(), getBackgroundColor());
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clearArea (canvas, ' ');
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}
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}
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//----------------------------------------------------------------------
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void MouseDraw::onKeyPress (finalcut::FKeyEvent* ev)
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{
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if ( ! ev )
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return;
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if ( ev->key() == 'q' )
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{
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close();
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ev->accept();
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}
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else
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finalcut::FDialog::onKeyPress(ev);
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}
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//----------------------------------------------------------------------
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void MouseDraw::onClose (finalcut::FCloseEvent* ev)
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{
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finalcut::FApplication::closeConfirmationDialog (this, ev);
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}
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//----------------------------------------------------------------------
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void MouseDraw::draw()
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{
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const auto y_max = int(getHeight());
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finalcut::FDialog::draw();
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setColor();
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if ( finalcut::FTerm::isNewFont() )
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{
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for (auto y{2}; y < y_max; y++)
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{
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print() << FPoint{10, y}
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<< fc::NF_rev_border_line_right;
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}
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print() << FPoint{10, y_max}
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<< fc::NF_rev_border_corner_lower_right;
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}
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else
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{
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print() << FPoint{10, 2}
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<< fc::BoxDrawingsDownAndHorizontal;
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for (auto y{3}; y < y_max; y++)
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{
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print() << FPoint{10, y} << fc::BoxDrawingsVertical;
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}
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print() << FPoint{10, y_max}
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<< fc::BoxDrawingsUpAndHorizontal;
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}
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drawCanvas();
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}
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//----------------------------------------------------------------------
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void MouseDraw::drawBrush (int x, int y, bool swap_color)
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{
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const auto Cols = int(getWidth());
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const auto Lines = int(getHeight());
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if ( x > 10 && x < Cols && y > 2 && y < Lines )
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{
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if ( swap_color )
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setColor (c_chooser.getBackground(), c_chooser.getForeground());
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else
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setColor (c_chooser.getForeground(), c_chooser.getBackground());
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// set canvas print cursor position
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canvas->cursor_x = x - canvas->offset_left - 10;
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canvas->cursor_y = y - canvas->offset_top - 2;
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// print on canvas
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print (canvas, brush.getBrush());
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// copy canvas to the dialog
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drawCanvas();
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}
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}
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//----------------------------------------------------------------------
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void MouseDraw::drawCanvas()
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{
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if ( ! hasPrintArea() )
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finalcut::FVTerm::getPrintArea();
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// Create canvas after initializing the desktop and color theme
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if ( ! canvas )
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createCanvas();
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if ( ! (hasPrintArea() && canvas) )
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return;
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auto printarea = getCurrentPrintArea();
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const int ax = 9 + getTermX() - printarea->offset_left;
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const int ay = 1 + getTermY() - printarea->offset_top;
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const int y_end = canvas->height;
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const int x_end = canvas->width;
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const int w_line_len = printarea->width + printarea->right_shadow;
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for (auto y{0}; y < y_end; y++) // line loop
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{
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// canvas character
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const auto& canvaschar = canvas->data[y * x_end];
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// window character
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auto& winchar = printarea->data[(ay + y) * w_line_len + ax];
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std::memcpy ( &winchar
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, &canvaschar
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, sizeof(finalcut::FChar) * unsigned(x_end) );
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if ( int(printarea->changes[ay + y].xmin) > ax )
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printarea->changes[ay + y].xmin = uInt(ax);
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if ( int(printarea->changes[ay + y].xmax) < ax + x_end - 1 )
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printarea->changes[ay + y].xmax = uInt(ax + x_end - 1);
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}
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printarea->has_changes = true;
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if ( updateTerminal() )
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flush();
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}
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//----------------------------------------------------------------------
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void MouseDraw::createCanvas()
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{
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FSize no_shadow{0, 0};
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finalcut::FRect scroll_geometry{0, 0, 1, 1};
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createArea (scroll_geometry, no_shadow, canvas);
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adjustSize();
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}
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//----------------------------------------------------------------------
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void MouseDraw::adjustSize()
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{
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const std::size_t w{60};
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const std::size_t h{18};
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const int x = 1 + int((getDesktopWidth() - w) / 2);
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const int y = 1 + int((getDesktopHeight() - h) / 2);
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setGeometry (FPoint{x, y}, FSize{w, h}, false);
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finalcut::FDialog::adjustSize();
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}
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//----------------------------------------------------------------------
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void MouseDraw::onMouseDown (finalcut::FMouseEvent* ev)
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{
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finalcut::FDialog::onMouseDown(ev);
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if ( ev->getButton() != fc::LeftButton
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&& ev->getButton() != fc::RightButton )
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return;
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drawBrush ( ev->getX()
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, ev->getY()
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, ev->getButton() == fc::RightButton );
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}
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//----------------------------------------------------------------------
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void MouseDraw::onMouseMove (finalcut::FMouseEvent* ev)
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{
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FDialog::onMouseMove(ev);
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if ( ev->getButton() != fc::LeftButton
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&& ev->getButton() != fc::RightButton )
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return;
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drawBrush ( ev->getX()
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, ev->getY()
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, ev->getButton() == fc::RightButton);
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}
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//----------------------------------------------------------------------
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void MouseDraw::cb_colorChanged()
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{
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brush.setForeground (c_chooser.getForeground());
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brush.setBackground (c_chooser.getBackground());
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brush.redraw();
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}
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//----------------------------------------------------------------------
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// main part
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//----------------------------------------------------------------------
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int main (int argc, char* argv[])
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{
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// Create the application object
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finalcut::FApplication app{argc, argv};
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// Create a simple dialog box
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MouseDraw mouse_draw{&app};
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// Set dialog object mouse_draw as main widget
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finalcut::FWidget::setMainWidget(&mouse_draw);
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// Show and start the application
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mouse_draw.show();
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return app.exec();
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}
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