finalcut/examples/scrollview.cpp

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2017-11-04 07:03:53 +01:00
/***********************************************************************
* scrollview.cpp - Shows client widgets in a scroll area *
* *
* This file is part of the Final Cut widget toolkit *
* *
* Copyright 2017-2018 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/>. *
***********************************************************************/
#include <final/final.h>
//----------------------------------------------------------------------
// class Scrollview
//----------------------------------------------------------------------
#pragma pack(push)
#pragma pack(1)
class Scrollview : public finalcut::FScrollView
{
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public:
// Constructor
explicit Scrollview (finalcut::FWidget* = nullptr);
// Disable copy constructor
Scrollview (const Scrollview&) = delete;
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// Destructor
~Scrollview ();
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// Disable assignment operator (=)
Scrollview& operator = (const Scrollview&) = delete;
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// Mutator
void setScrollSize (std::size_t, std::size_t);
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private:
// Method
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virtual void draw() override;
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// Callback methods
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void cb_go_east (finalcut::FWidget*, FDataPtr);
void cb_go_south (finalcut::FWidget*, FDataPtr);
void cb_go_west (finalcut::FWidget*, FDataPtr);
void cb_go_north (finalcut::FWidget*, FDataPtr);
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// Data Members
wchar_t pointer_right{finalcut::fc::BlackRightPointingPointer};
wchar_t pointer_down{finalcut::fc::BlackDownPointingTriangle};
wchar_t pointer_left{finalcut::fc::BlackLeftPointingPointer};
wchar_t pointer_up{finalcut::fc::BlackUpPointingTriangle};
finalcut::FButton go_east{pointer_right, this};
finalcut::FButton go_south{pointer_down, this};
finalcut::FButton go_west{pointer_left, this};
finalcut::FButton go_north{pointer_up, this};
};
#pragma pack(pop)
//----------------------------------------------------------------------
Scrollview::Scrollview (finalcut::FWidget* parent)
: finalcut::FScrollView(parent)
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{
// Sets the navigation button geometry
go_east.setGeometry (1, 1, 5, 1);
go_south.setGeometry (int(getScrollWidth()) - 5, 1, 5, 1);
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go_west.setGeometry ( int(getScrollWidth()) - 5
, int(getScrollHeight()) - 2, 5, 1);
go_north.setGeometry (1, int(getScrollHeight()) - 2, 5, 1);
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// Add scroll function callbacks to the buttons
go_east.addCallback
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(
"clicked",
F_METHOD_CALLBACK (this, &Scrollview::cb_go_east)
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);
go_south.addCallback
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(
"clicked",
F_METHOD_CALLBACK (this, &Scrollview::cb_go_south)
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);
go_west.addCallback
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(
"clicked",
F_METHOD_CALLBACK (this, &Scrollview::cb_go_west)
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);
go_north.addCallback
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(
"clicked",
F_METHOD_CALLBACK (this, &Scrollview::cb_go_north)
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);
}
//----------------------------------------------------------------------
Scrollview::~Scrollview()
{ }
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//----------------------------------------------------------------------
void Scrollview::setScrollSize (std::size_t width, std::size_t height)
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{
FScrollView::setScrollSize (width, height);
go_south.setPos (int(width) - 5, 1);
go_west.setPos (int(width) - 5, int(height) - 1);
go_north.setPos (1, int(height) - 1);
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}
//----------------------------------------------------------------------
void Scrollview::draw()
{
if ( isMonochron() )
setReverse(true);
setColor (wc.label_inactive_fg, wc.dialog_bg);
clearArea();
for (int y = 0; y < int(getScrollHeight()); y++)
{
setPrintPos (1, 1 + y);
for (int x = 0; x < int(getScrollWidth()); x++)
print (32 + ((x + y) % 0x5f));
}
if ( isMonochron() )
setReverse(false);
FScrollView::draw();
}
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//----------------------------------------------------------------------
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void Scrollview::cb_go_east (finalcut::FWidget*, FDataPtr)
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{
scrollToX (int(getScrollWidth() - getViewportWidth()) + 1);
go_south.setFocus();
go_east.redraw();
go_south.redraw();
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}
//----------------------------------------------------------------------
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void Scrollview::cb_go_south (finalcut::FWidget*, FDataPtr)
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{
scrollToY (int(getScrollHeight() - getViewportHeight()) + 1);
go_west.setFocus();
go_south.redraw();
go_west.redraw();
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}
//----------------------------------------------------------------------
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void Scrollview::cb_go_west (finalcut::FWidget*, FDataPtr)
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{
scrollToX (1);
go_north.setFocus();
go_west.redraw();
go_north.redraw();
}
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//----------------------------------------------------------------------
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void Scrollview::cb_go_north (finalcut::FWidget*, FDataPtr)
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{
scrollToY (1);
go_east.setFocus();
go_north.redraw();
go_east.redraw();
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}
//----------------------------------------------------------------------
// class Scrollviewdemo
//----------------------------------------------------------------------
#pragma pack(push)
#pragma pack(1)
class Scrollviewdemo : public finalcut::FDialog
{
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public:
// Constructor
explicit Scrollviewdemo (finalcut::FWidget* = nullptr);
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// Destructor
~Scrollviewdemo();
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// Event handler
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virtual void onClose (finalcut::FCloseEvent*) override;
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// Callback method
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void cb_quit (finalcut::FWidget* = nullptr, FDataPtr = nullptr);
// Data Members
Scrollview sview{this};
finalcut::FButton quit_btn{"&Quit", this};
finalcut::FLabel label{this};
};
#pragma pack(pop)
//----------------------------------------------------------------------
Scrollviewdemo::Scrollviewdemo (finalcut::FWidget* parent)
: finalcut::FDialog(parent)
{
setGeometry (16, 3, 50, 19);
setText ("Scrolling viewport example");
// The scrolling viewport widget
sview.setGeometry(3, 2, 44, 12);
sview.setScrollSize(188, 124);
// Quit button
quit_btn.setGeometry(37, 15, 10, 1);
// Add function callback
quit_btn.addCallback
(
"clicked",
F_METHOD_CALLBACK (this, &Scrollviewdemo::cb_quit)
);
// Text label
label.setGeometry(2, 1, 46, 1);
label.setEmphasis();
label << L"Use scrollbars to change the viewport position";
}
//----------------------------------------------------------------------
Scrollviewdemo::~Scrollviewdemo()
{ }
//----------------------------------------------------------------------
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void Scrollviewdemo::cb_quit (finalcut::FWidget*, FDataPtr)
{
close();
}
//----------------------------------------------------------------------
void Scrollviewdemo::onClose (finalcut::FCloseEvent* ev)
{
finalcut::FApplication::closeConfirmationDialog (this, ev);
}
//----------------------------------------------------------------------
// main part
//----------------------------------------------------------------------
int main (int argc, char* argv[])
{
// Create the application object
finalcut::FApplication app(argc, argv);
// Create a simple dialog box
Scrollviewdemo svdemo(&app);
// Set dialog main_dlg as main widget
app.setMainWidget(&svdemo);
// Show and start the application
svdemo.show();
return app.exec();
}