finalcut/examples/mouse.cpp

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/***********************************************************************
* mouse.cpp - A small mouse-controlled drawing program *
* *
* This file is part of the Final Cut widget toolkit *
* *
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* Copyright 2017-2020 Markus Gans *
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* *
* The Final Cut is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of *
* the License, or (at your option) any later version. *
* *
* The Final Cut is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
***********************************************************************/
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#include <final/final.h>
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namespace fc = finalcut::fc;
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using finalcut::FColorPair;
using finalcut::FRect;
using finalcut::FPoint;
using finalcut::FSize;
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//----------------------------------------------------------------------
// class ColorChooser
//----------------------------------------------------------------------
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class ColorChooser final : public finalcut::FWidget
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{
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public:
// Constructor
explicit ColorChooser (finalcut::FWidget* = nullptr);
// Disable copy constructor
ColorChooser (const ColorChooser&) = delete;
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// Destructor
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~ColorChooser() override;
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// Disable copy assignment operator (=)
ColorChooser& operator = (const ColorChooser&) = delete;
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// Accessors
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FColor getForeground();
FColor getBackground();
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private:
// Mutator
void setSize (const FSize&, bool = true) override;
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// Method
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void draw() override;
void drawBorder() override;
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// Event handler
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void onMouseDown (finalcut::FMouseEvent*) override;
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// Data members
FColor fg_color{fc::White};
FColor bg_color{fc::Black};
finalcut::FLabel headline{this};
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};
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//----------------------------------------------------------------------
ColorChooser::ColorChooser (finalcut::FWidget* parent)
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: FWidget(parent)
{
FWidget::setSize (FSize{8, 12});
setFixedSize (FSize{8, 12});
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unsetFocusable();
if ( parent )
{
const FColor fg = parent->getForegroundColor();
const FColor bg = parent->getBackgroundColor();
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FWidget::setForegroundColor(fg);
FWidget::setBackgroundColor(bg);
headline.setForegroundColor(fg);
headline.setBackgroundColor(bg);
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}
// Text label
headline.setGeometry (FPoint{1, 1}, FSize{8, 1});
headline.setEmphasis();
headline.setAlignment (fc::alignCenter);
headline << "Color";
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}
//----------------------------------------------------------------------
ColorChooser::~ColorChooser()
{ }
//----------------------------------------------------------------------
inline FColor ColorChooser::getForeground()
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{
return fg_color;
}
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//----------------------------------------------------------------------
inline FColor ColorChooser::getBackground()
{
return bg_color;
}
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//----------------------------------------------------------------------
void ColorChooser::setSize (const FSize& size, bool adjust)
{
// Avoids calling a virtual function from the constructor
// (CERT, OOP50-CPP)
FWidget::setSize (size, adjust);
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}
//----------------------------------------------------------------------
void ColorChooser::draw()
{
setColor();
drawBorder();
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for (FColor c{0}; c < 16; c++)
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{
print() << FPoint{2 + (c / 8) * 3, 3 + c % 8};
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if ( c < 6 )
setColor (fc::LightGray, c);
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else if ( c > 8 )
setColor (fc::DarkGray, c);
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else
setColor (fc::White, c);
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if ( c == bg_color )
{
print() << L' ' << wchar_t(fc::Times) << L' ';
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}
else
print (" ");
}
}
//----------------------------------------------------------------------
void ColorChooser::drawBorder()
{
finalcut::drawBorder (this, FRect{FPoint{1, 2}, FSize{8, 10}});
}
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//----------------------------------------------------------------------
void ColorChooser::onMouseDown (finalcut::FMouseEvent* ev)
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{
const int mouse_x = ev->getX();
const int mouse_y = ev->getY();
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if ( ev->getButton() == fc::MiddleButton )
return;
for (int c{0}; c < 16; c++)
{
const int xmin = 2 + (c / 8) * 3;
const int xmax = 4 + (c / 8) * 3;
const int y = 3 + c % 8;
if ( mouse_x >= xmin && mouse_x <= xmax && mouse_y == y )
{
if ( ev->getButton() == fc::LeftButton )
bg_color = FColor(c);
else if ( ev->getButton() == fc::RightButton )
fg_color = FColor(c);
redraw();
emitCallback("clicked");
}
}
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}
//----------------------------------------------------------------------
// class Brushes
//----------------------------------------------------------------------
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class Brushes final : public finalcut::FWidget
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{
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public:
// Constructor
explicit Brushes (finalcut::FWidget* = nullptr);
// Disable copy constructor
Brushes (const Brushes&) = delete;
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// Destructor
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~Brushes() override;
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// Disable copy assignment operator (=)
Brushes& operator = (const Brushes&) = delete;
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// Accessor
wchar_t getBrush();
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// Mutators
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void setForeground (FColor);
void setBackground (FColor);
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private:
// Mutator
void setSize (const FSize&, bool = true) override;
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// Method
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void draw() override;
void drawBorder() override;
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// Event handler
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void onMouseDown (finalcut::FMouseEvent*) override;
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// Data members
wchar_t brush{L' '};
FColor fg_color{fc::White};
FColor bg_color{fc::Black};
finalcut::FLabel headline{this};
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};
//----------------------------------------------------------------------
Brushes::Brushes (finalcut::FWidget* parent)
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: FWidget(parent)
{
FWidget::setSize (FSize{8, 4});
setFixedSize (FSize{8, 4});
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unsetFocusable();
if ( parent )
{
const FColor fg = parent->getForegroundColor();
const FColor bg = parent->getBackgroundColor();
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FWidget::setForegroundColor(fg);
FWidget::setBackgroundColor(bg);
headline.setForegroundColor(fg);
headline.setBackgroundColor(bg);
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}
// Text label
headline.setGeometry(FPoint{1, 1}, FSize{8, 1});
headline.setEmphasis();
headline.setAlignment (fc::alignCenter);
headline << "Brush";
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}
//----------------------------------------------------------------------
Brushes::~Brushes()
{ }
//----------------------------------------------------------------------
void Brushes::setSize (const FSize& size, bool adjust)
{
// Avoids calling a virtual function from the constructor
// (CERT, OOP50-CPP)
FWidget::setSize (size, adjust);
}
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//----------------------------------------------------------------------
void Brushes::draw()
{
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int pos{0};
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setColor();
drawBorder();
print() << FPoint{2, 3}
<< FColorPair{fg_color, bg_color} << " "
<< finalcut::FString{3, fc::MediumShade};
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if ( brush != L' ' )
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pos = 3;
setColor();
print() << FPoint{3 + pos, 2}
<< fc::BlackDownPointingTriangle
<< FPoint{3 + pos, 4}
<< fc::BlackUpPointingTriangle;
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}
//----------------------------------------------------------------------
void Brushes::drawBorder()
{
finalcut::drawBorder (this, FRect{FPoint{1, 2}, FSize{8, 3}});
}
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//----------------------------------------------------------------------
void Brushes::onMouseDown (finalcut::FMouseEvent* ev)
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{
const int mouse_x = ev->getX();
const int mouse_y = ev->getY();
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if ( ev->getButton() != fc::LeftButton )
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return;
if ( mouse_x >= 2 && mouse_x <= 4 && mouse_y == 3 )
{
brush = L' ';
redraw();
}
else if ( mouse_x >= 5 && mouse_x <= 7 && mouse_y == 3 )
{
brush = fc::MediumShade;
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redraw();
}
}
//----------------------------------------------------------------------
inline wchar_t Brushes::getBrush()
{
return brush;
}
//----------------------------------------------------------------------
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inline void Brushes::setForeground (FColor color)
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{
fg_color = color;
}
//----------------------------------------------------------------------
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inline void Brushes::setBackground (FColor color)
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{
bg_color = color;
}
//----------------------------------------------------------------------
// class MouseDraw
//----------------------------------------------------------------------
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class MouseDraw final : public finalcut::FDialog
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{
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public:
// Using-declaration
using FWidget::setGeometry;
// Constructor
explicit MouseDraw (finalcut::FWidget* = nullptr);
// Disable copy constructor
MouseDraw (const MouseDraw&) = delete;
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// Destructor
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~MouseDraw() override;
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// Disable copy assignment operator (=)
MouseDraw& operator = (const MouseDraw&) = delete;
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// Methods
void setGeometry (const FPoint&, const FSize&, bool = true) override;
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// Event handlers
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void onKeyPress (finalcut::FKeyEvent*) override;
void onClose (finalcut::FCloseEvent*) override;
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private:
// Methods
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void draw() override;
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void drawBrush (int, int, bool = false);
void drawCanvas();
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void adjustSize() override;
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// Event handler
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void onMouseDown (finalcut::FMouseEvent*) override;
void onMouseMove (finalcut::FMouseEvent*) override;
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// Callback methods
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void cb_colorChanged (const finalcut::FWidget*, const FDataPtr);
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// Data members
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FTermArea* canvas{nullptr};
ColorChooser c_chooser{this};
Brushes brush{this};
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};
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//----------------------------------------------------------------------
MouseDraw::MouseDraw (finalcut::FWidget* parent)
: finalcut::FDialog(parent)
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{
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FDialog::setText ("Drawing with the mouse");
c_chooser.setPos (FPoint{1, 1});
c_chooser.addCallback
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(
"clicked",
F_METHOD_CALLBACK (this, &MouseDraw::cb_colorChanged)
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);
brush.setPos (FPoint{1, 12});
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FSize no_shadow{0, 0};
finalcut::FRect scroll_geometry{0, 0, 1, 1};
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createArea (scroll_geometry, no_shadow, canvas);
}
//----------------------------------------------------------------------
MouseDraw::~MouseDraw()
{ }
//----------------------------------------------------------------------
void MouseDraw::setGeometry ( const FPoint& p, const FSize& s, bool adjust)
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{
finalcut::FDialog::setGeometry (p, s, adjust);
const std::size_t w = s.getWidth();
const std::size_t h = s.getHeight();
const finalcut::FRect scroll_geometry (FPoint{0, 0}, FSize{w - 11, h - 3});
const FSize no_shadow{0, 0};
const int old_w = canvas->width;
const int old_h = canvas->height;
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resizeArea (scroll_geometry, no_shadow, canvas);
if ( old_w != canvas->width || old_h != canvas->height )
{
setColor(getForegroundColor(), getBackgroundColor());
clearArea (canvas, ' ');
}
}
//----------------------------------------------------------------------
void MouseDraw::onKeyPress (finalcut::FKeyEvent* ev)
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{
if ( ! ev )
return;
if ( ev->key() == 'q' )
{
close();
ev->accept();
}
else
finalcut::FDialog::onKeyPress(ev);
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}
//----------------------------------------------------------------------
void MouseDraw::onClose (finalcut::FCloseEvent* ev)
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{
finalcut::FApplication::closeConfirmationDialog (this, ev);
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}
//----------------------------------------------------------------------
void MouseDraw::draw()
{
const int y_max = int(getHeight());
finalcut::FDialog::draw();
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setColor();
if ( finalcut::FTerm::isNewFont() )
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{
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for (int y{2}; y < y_max; y++)
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{
print() << FPoint{10, y}
<< fc::NF_rev_border_line_right;
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}
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print() << FPoint{10, y_max}
<< fc::NF_rev_border_corner_lower_right;
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}
else
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{
print() << FPoint{10, 2}
<< fc::BoxDrawingsDownAndHorizontal;
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for (int y{3}; y < y_max; y++)
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{
print() << FPoint{10, y} << fc::BoxDrawingsVertical;
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}
print() << FPoint{10, y_max}
<< fc::BoxDrawingsUpAndHorizontal;
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}
drawCanvas();
}
//----------------------------------------------------------------------
void MouseDraw::drawBrush (int x, int y, bool swap_color)
{
const int Cols = int(getWidth());
const int Lines = int(getHeight());
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if ( x > 10 && x < Cols && y > 2 && y < Lines )
{
if ( swap_color )
setColor (c_chooser.getBackground(), c_chooser.getForeground());
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else
setColor (c_chooser.getForeground(), c_chooser.getBackground());
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// set canvas print cursor position
canvas->cursor_x = x - canvas->offset_left - 10;
canvas->cursor_y = y - canvas->offset_top - 2;
// print on canvas
print (canvas, brush.getBrush());
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// copy canvas to the dialog
drawCanvas();
}
}
//----------------------------------------------------------------------
void MouseDraw::drawCanvas()
{
if ( ! hasPrintArea() )
finalcut::FVTerm::getPrintArea();
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if ( ! (hasPrintArea() && canvas) )
return;
auto printarea = getCurrentPrintArea();
const int ax = 9 + getTermX() - printarea->offset_left;
const int ay = 1 + getTermY() - printarea->offset_top;
const int y_end = canvas->height;
const int x_end = canvas->width;
const int w_line_len = printarea->width + printarea->right_shadow;
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for (int y{0}; y < y_end; y++) // line loop
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{
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const finalcut::FChar* canvaschar{}; // canvas character
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finalcut::FChar* winchar{}; // window character
canvaschar = &canvas->data[y * x_end];
winchar = &printarea->data[(ay + y) * w_line_len + ax];
std::memcpy ( winchar
, canvaschar
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, sizeof(finalcut::FChar) * unsigned(x_end) );
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if ( int(printarea->changes[ay + y].xmin) > ax )
printarea->changes[ay + y].xmin = uInt(ax);
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if ( int(printarea->changes[ay + y].xmax) < ax + x_end - 1 )
printarea->changes[ay + y].xmax = uInt(ax + x_end - 1);
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}
printarea->has_changes = true;
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}
//----------------------------------------------------------------------
void MouseDraw::adjustSize()
{
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const std::size_t w{60};
const std::size_t h{18};
const int x = 1 + int((getParentWidget()->getWidth() - w) / 2);
const int y = 1 + int((getParentWidget()->getHeight() - h) / 2);
setGeometry (FPoint{x, y}, FSize{w, h}, false);
finalcut::FDialog::adjustSize();
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}
//----------------------------------------------------------------------
void MouseDraw::onMouseDown (finalcut::FMouseEvent* ev)
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{
finalcut::FDialog::onMouseDown(ev);
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if ( ev->getButton() != fc::LeftButton
&& ev->getButton() != fc::RightButton )
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return;
drawBrush ( ev->getX()
, ev->getY()
, ev->getButton() == fc::RightButton );
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}
//----------------------------------------------------------------------
void MouseDraw::onMouseMove (finalcut::FMouseEvent* ev)
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{
FDialog::onMouseMove(ev);
if ( ev->getButton() != fc::LeftButton
&& ev->getButton() != fc::RightButton )
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return;
drawBrush ( ev->getX()
, ev->getY()
, ev->getButton() == fc::RightButton);
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}
//----------------------------------------------------------------------
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void MouseDraw::cb_colorChanged (const finalcut::FWidget*, const FDataPtr)
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{
brush.setForeground (c_chooser.getForeground());
brush.setBackground (c_chooser.getBackground());
brush.redraw();
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}
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//----------------------------------------------------------------------
// main part
//----------------------------------------------------------------------
int main (int argc, char* argv[])
{
// Create the application object
finalcut::FApplication app{argc, argv};
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// Create a simple dialog box
MouseDraw mouse_draw{&app};
mouse_draw.setGeometry (FPoint{12, 4}, FSize{60, 18});
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// Set dialog object mouse_draw as main widget
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finalcut::FWidget::setMainWidget(&mouse_draw);
// Show and start the application
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mouse_draw.show();
return app.exec();
}