finalcut/examples/transparent.cpp

291 lines
8.4 KiB
C++

/***********************************************************************
* transparent.cpp - Demonstrates transparent windows *
* *
* This file is part of the Final Cut widget toolkit *
* *
* Copyright 2016-2020 Markus Gans *
* *
* 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/>. *
***********************************************************************/
#include <final/final.h>
namespace fc = finalcut::fc;
using finalcut::FColorPair;
using finalcut::FPoint;
using finalcut::FSize;
using finalcut::FStyle;
//----------------------------------------------------------------------
// class Transparent
//----------------------------------------------------------------------
class Transparent final : public finalcut::FDialog
{
public:
// Typedef and Enumeration
typedef enum ttype
{
transparent = 0,
shadow = 1,
inherit_background = 2
} trans_type;
// Constructor
explicit Transparent ( finalcut::FWidget* = nullptr
, trans_type = transparent );
// Disable copy constructor
Transparent (const Transparent&) = delete;
// Destructor
~Transparent() override;
// Disable copy assignment operator (=)
Transparent& operator = (const Transparent&) = delete;
private:
// Method
void draw() override;
// Event handlers
void onKeyPress (finalcut::FKeyEvent* ev) override;
// Data members
trans_type type;
};
//----------------------------------------------------------------------
Transparent::Transparent ( finalcut::FWidget* parent
, Transparent::trans_type tt )
: finalcut::FDialog{parent}
, type{tt}
{
// Set statusbar text for this window
// Avoids calling a virtual function from the constructor
// (CERT, OOP50-CPP)
FWidget::setStatusbarMessage("Press Q to quit");
}
//----------------------------------------------------------------------
Transparent::~Transparent()
{ }
//----------------------------------------------------------------------
void Transparent::draw()
{
finalcut::FDialog::draw();
if ( finalcut::FTerm::isMonochron() )
setReverse(true);
if ( type == shadow )
{
const auto& wc = getColorTheme();
print() << FColorPair {wc->shadow_bg, wc->shadow_fg}
<< FStyle {fc::ColorOverlay};
}
else if ( type == inherit_background )
{
if ( finalcut::FTerm::getMaxColor() > 8 )
print() << FColorPair {fc::Blue, fc::Black};
else
print() << FColorPair {fc::Green, fc::Black};
print() << FStyle {fc::InheritBackground};
}
else
print() << FStyle {fc::Transparent};
const finalcut::FString line{getClientWidth(), '.'};
// Fill window area
for (int n{1}; n <= int(getClientHeight()); n++)
{
print() << FPoint{2, 2 + n}
<< line;
}
print() << FStyle{fc::Reset};
}
//----------------------------------------------------------------------
void Transparent::onKeyPress (finalcut::FKeyEvent* ev)
{
if ( ! ev )
return;
if ( ev->key() == 'q' && getParentWidget() )
{
getParentWidget()->close();
ev->accept();
}
else
finalcut::FDialog::onKeyPress(ev);
}
//----------------------------------------------------------------------
// class MainWindow
//----------------------------------------------------------------------
class MainWindow final : public finalcut::FDialog
{
public:
// Constructor
explicit MainWindow (finalcut::FWidget* = nullptr);
// Disable copy constructor
MainWindow (const MainWindow&) = delete;
// Destructor
~MainWindow() override;
// Disable copy assignment operator (=)
MainWindow& operator = (const MainWindow&) = delete;
private:
// Method
void draw() override;
// Event handlers
void onClose (finalcut::FCloseEvent*) override;
void onShow (finalcut::FShowEvent*) override;
void onTimer (finalcut::FTimerEvent*) override;
void onKeyPress (finalcut::FKeyEvent* ev) override
{
if ( ! ev )
return;
if ( ev->key() == 'q' )
{
close();
ev->accept();
}
else
finalcut::FDialog::onKeyPress(ev);
}
// Data members
finalcut::FString line1{" .-. .-. .-."};
finalcut::FString line2{"`._.' `._.' `._.' "};
Transparent* transpwin{nullptr};
Transparent* shadowwin{nullptr};
Transparent* ibg{nullptr};
finalcut::FStatusBar status_bar{this};
};
//----------------------------------------------------------------------
MainWindow::MainWindow (finalcut::FWidget* parent)
: FDialog{parent}
{
// The memory allocation for the following three sub windows occurs
// with the operator new. The lifetime of the generated widget
// is managed by the parent object (this). The operator delete
// is not required in this class and would result in a double free.
transpwin = new Transparent(this);
transpwin->setText("transparent");
transpwin->setGeometry (FPoint{6, 3}, FSize{29, 12});
transpwin->unsetTransparentShadow();
shadowwin = new Transparent(this, Transparent::shadow);
shadowwin->setText("shadow");
shadowwin->setGeometry (FPoint{46, 11}, FSize{29, 12});
shadowwin->unsetTransparentShadow();
ibg = new Transparent(this, Transparent::inherit_background);
ibg->setText("inherit background");
ibg->setGeometry (FPoint{42, 3}, FSize{29, 7});
ibg->unsetTransparentShadow();
// Set statusbar text for this window
setStatusbarMessage("Press Q to quit");
unsetTransparentShadow();
activateDialog();
}
//----------------------------------------------------------------------
MainWindow::~MainWindow()
{ }
//----------------------------------------------------------------------
void MainWindow::draw()
{
finalcut::FDialog::draw();
if ( finalcut::FTerm::isMonochron() )
setReverse(true);
setColor();
print() << FPoint{2, 4} << line1;
print() << FPoint{2, 5} << line2;
if ( finalcut::FTerm::isMonochron() )
setReverse(false);
updateTerminal();
}
//----------------------------------------------------------------------
void MainWindow::onClose (finalcut::FCloseEvent* ev)
{
finalcut::FApplication::closeConfirmationDialog (this, ev);
}
//----------------------------------------------------------------------
void MainWindow::onShow (finalcut::FShowEvent*)
{
addTimer(100); // Call onTimer() every 100 ms
}
//----------------------------------------------------------------------
void MainWindow::onTimer (finalcut::FTimerEvent*)
{
wchar_t first_Char[2];
std::size_t length = line1.getLength();
first_Char[0] = line1[0];
first_Char[1] = line2[0];
line1 = line1.right(length - 1) + first_Char[0];
line2 = line2.right(length - 1) + first_Char[1];
redraw();
flush();
}
//----------------------------------------------------------------------
// main part
//----------------------------------------------------------------------
int main (int argc, char* argv[])
{
// Create the application object
finalcut::FApplication app {argc, argv};
app.setNonBlockingRead();
// Create main dialog object
MainWindow main_dlg {&app};
main_dlg.setText ("non-transparent");
main_dlg.setGeometry (FPoint{8, 16}, FSize{26, 7});
// Set dialog main_dlg as main widget
finalcut::FWidget::setMainWidget (&main_dlg);
// Show and start the application
main_dlg.show();
return app.exec();
}