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|
package CharacterWidget;
use strict;
use warnings;
use List::Util qw( max );
use QtCore4;
use QtGui4;
use QtCore4::isa qw( Qt::Widget );
use QtCore4::slots
updateFont => ['QFont'],
updateSize => ['QString'],
updateStyle => ['QString'],
updateFontMerging => ['bool'];
use QtCore4::signals
characterSelected => ['QString'];
sub displayFont() {
return this->{displayFont};
}
sub columns() {
return this->{columns};
}
sub lastKey() {
return this->{lastKey};
}
sub squareSize() {
return this->{squareSize};
}
sub setDisplayFont() {
return this->{displayFont} = shift;
}
sub setColumns() {
return this->{columns} = shift;
}
sub setLastKey() {
return this->{lastKey} = shift;
}
sub setSquareSize() {
return this->{squareSize} = shift;
}
# [0]
sub NEW {
my ( $class, $parent ) = @_;
$class->SUPER::NEW( $parent );
this->setSquareSize( 24 );
this->setColumns( 16 );
this->setLastKey( -1 );
this->setDisplayFont( Qt::Font() );
this->setMouseTracking(1);
}
# [0]
# [1]
sub updateFont {
my ($font) = @_;
this->displayFont->setFamily($font->family());
this->setSquareSize( max(24, Qt::FontMetrics(this->displayFont)->xHeight() * 3) );
this->adjustSize();
this->update();
}
# [1]
# [2]
sub updateSize {
my ($fontSize) = @_;
this->displayFont->setPointSize($fontSize);
this->setSquareSize( max(24, Qt::FontMetrics(displayFont)->xHeight() * 3) );
this->adjustSize();
this->update();
}
# [2]
sub updateStyle {
my ($fontStyle) = @_;
my $fontDatabase = Qt::FontDatabase();
my $oldStrategy = this->displayFont->styleStrategy();
this->setDisplayFont( $fontDatabase->font(this->displayFont->family(), $fontStyle, this->displayFont->pointSize()) );
this->displayFont->setStyleStrategy($oldStrategy);
this->setSquareSize( max(24, Qt::FontMetrics(displayFont)->xHeight() * 3) );
this->adjustSize();
this->update();
}
sub updateFontMerging {
my ($enable) = @_;
if ($enable) {
this->displayFont->setStyleStrategy(Qt::Font::PreferDefault());
}
else {
this->displayFont->setStyleStrategy(Qt::Font::NoFontMerging());
}
this->adjustSize();
this->update();
}
# [3]
sub sizeHint {
return Qt::Size(this->columns*this->squareSize, (65536/this->columns)*this->squareSize);
}
# [3]
# [4]
sub mouseMoveEvent {
my ($event) = @_;
my $widgetPosition = this->mapFromGlobal($event->globalPos());
my $key = sprintf '%d', (sprintf '%d', $widgetPosition->y()/this->squareSize)*this->columns + $widgetPosition->x()/this->squareSize;
my $char = chr($key);
utf8::upgrade($char);
my $text = sprintf( "<p>Character: <span style=\"font-size: 24pt; font-family: %s\">", this->displayFont->family() )
. $char
. "</span><p>Value: 0x"
. sprintf( '%x', $key );
Qt::ToolTip::showText($event->globalPos(), $text, this);
}
# [4]
# [5]
sub mousePressEvent {
my ($event) = @_;
if ($event->button() == Qt::LeftButton()) {
this->setLastKey( sprintf '%d', (sprintf '%d', $event->y()/this->squareSize)*this->columns + $event->x()/this->squareSize );
if (Qt::Char(this->lastKey)->category() != Qt::Char::NoCategory()) {
my $char = chr(this->lastKey);
utf8::upgrade($char);
emit this->characterSelected($char);
}
this->update();
}
else {
this->SUPER::mousePressEvent($event);
}
}
# [5]
# [6]
sub paintEvent {
my ($event) = @_;
my $squareSize = this->squareSize;
my $painter = Qt::Painter(this);
$painter->fillRect($event->rect(), Qt::Brush(Qt::white()));
$painter->setFont(this->displayFont);
# [6]
# [7]
my $redrawRect = $event->rect();
my $beginRow = sprintf '%d', $redrawRect->top()/$squareSize;
my $endRow = sprintf '%d', $redrawRect->bottom()/$squareSize;
my $beginColumn = sprintf '%d', $redrawRect->left()/$squareSize;
my $endColumn = sprintf '%d', $redrawRect->right()/$squareSize;
# [7]
# [8]
$painter->setPen(Qt::Color(Qt::gray()));
for (my $row = $beginRow; $row <= $endRow; ++$row) {
for (my $column = $beginColumn; $column <= $endColumn; ++$column) {
$painter->drawRect($column*$squareSize, $row*$squareSize, $squareSize, $squareSize);
}
# [8] //! [9]
}
# [9]
# [10]
my $fontMetrics = Qt::FontMetrics(this->displayFont);
$painter->setPen(Qt::Color(Qt::black()));
for (my $row = $beginRow; $row <= $endRow; ++$row) {
for (my $column = $beginColumn; $column <= $endColumn; ++$column) {
my $key = $row*this->columns + $column;
$painter->setClipRect($column*$squareSize, $row*$squareSize, $squareSize, $squareSize);
if ($key == this->lastKey) {
$painter->fillRect($column*$squareSize + 1, $row*$squareSize + 1, $squareSize, $squareSize, Qt::Brush(Qt::red()));
}
my $char = chr($key);
utf8::upgrade($char);
$painter->drawText($column*$squareSize + ($squareSize / 2) - $fontMetrics->width(Qt::Char(Qt::Int($key)))/2,
$row*$squareSize + 4 + $fontMetrics->ascent(),
$char);
}
}
$painter->end();
}
# [10]
1;
|
