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/**
Source : inspired by https://www.kdab.com/qt-input-method-virtual-keyboard/
*/
#include "Keyboard.h"
#include <QWidget>
#include <QRect>
#include <QString>
#include <QSignalMapper>
#include <QPushButton>
#include <QImageReader>
#define NEXT_ROW_MARKER '\0'
#define SIZE_FACTOR 1 /* looks nice on AGL demo */
//#define SIZE_FACTOR 0.5 /* looks nice on PC build */
#define OFFSET_H ( 78 * SIZE_FACTOR )
#define KEY_WIDTH ( 78 * SIZE_FACTOR )
#define KEY_HEIGHT ( 94 * SIZE_FACTOR )
#define MARGIN_H ( 12 * SIZE_FACTOR )
#define MARGIN_V ( 18 * SIZE_FACTOR )
#define SPACE_BAR_WIDTH ( 502 * SIZE_FACTOR )
struct KeyboardLayoutEntry
{
int key;
const char *image;
};
static KeyboardLayoutEntry keyboardLayout[] = {
{ '1' , "1.png" },
{ '2' , "2.png" },
{ '3' , "3.png" },
{ '4' , "4.png" },
{ '5' , "5.png" },
{ '6' , "6.png" },
{ '7' , "7.png" },
{ '8' , "8.png" },
{ '9' , "9.png" },
{ '0' , "0.png" },
{ NEXT_ROW_MARKER, NULL },
{ 'q' , "Q.png" },
{ 'w' , "W.png" },
{ 'e' , "E.png" },
{ 'r' , "R.png" },
{ 't' , "T.png" },
{ 'y' , "Y.png" },
{ 'u' , "U.png" },
{ 'i' , "I.png" },
{ 'o' , "O.png" },
{ 'p' , "P.png" },
{ NEXT_ROW_MARKER, NULL },
{ 'a' , "A.png" },
{ 's' , "S.png" },
{ 'd' , "D.png" },
{ 'f' , "F.png" },
{ 'g' , "G.png" },
{ 'h' , "H.png" },
{ 'j' , "J.png" },
{ 'k' , "K.png" },
{ 'l' , "L.png" },
{ NEXT_ROW_MARKER, NULL },
{ 'z' , "Z.png" },
{ 'x' , "X.png" },
{ 'c' , "C.png" },
{ 'v' , "V.png" },
{ 'b' , "B.png" },
{ 'n' , "N.png" },
{ 'm' , "M.png" },
{ '!' , "exclam.png" },
{ '\b',"back.png" },
{ NEXT_ROW_MARKER, NULL },
{ '\'',"apostrophe.png" },
{ '&' , "et.png" },
{ ' ' , "space.png" },
{ '-' , "minus.png" },
{ '/' , "slash.png" }
};
const static int layoutSize = (sizeof(keyboardLayout) /
sizeof(KeyboardLayoutEntry));
Keyboard::Keyboard(QRect r, QWidget *parent):QWidget(parent),background(parent),
rect(QRect(r.x() + (r.width()-(r.width()*SIZE_FACTOR))/2, r.y(), r.width()*SIZE_FACTOR, r.height()*SIZE_FACTOR)),
mapper(new QSignalMapper(this))
{
int nbRowMarkers = 1;
for (int i = 0; i < layoutSize; ++i)
if (keyboardLayout[i].key == NEXT_ROW_MARKER)
nbRowMarkers++;
connect(mapper, SIGNAL(mapped(int)), SLOT(buttonClicked(int)));
int row = 0;
int offset_h = KEY_WIDTH;
int offset_v = (rect.height() - (KEY_HEIGHT*nbRowMarkers + MARGIN_V*(nbRowMarkers-1))) / 2;
background.setGeometry(rect);
QImageReader reader(QString(":/images/background.png"));
background.setPixmap(QPixmap::fromImage(reader.read()).scaled(rect.width(), rect.height(), Qt::IgnoreAspectRatio));
background.show();
for (int i = 0; i < layoutSize; ++i)
{
int key_width = KEY_WIDTH;
if (keyboardLayout[i].key == NEXT_ROW_MARKER)
{
row++;
offset_h = OFFSET_H;
if (row == 2)
offset_h += (KEY_WIDTH + MARGIN_H)/2;
else if (row == 3)
offset_h += (KEY_WIDTH + MARGIN_H);
offset_v += (KEY_HEIGHT+MARGIN_V);
continue;
}
else if (keyboardLayout[i].key == ' ')
{
key_width = SPACE_BAR_WIDTH;
}
QPushButton *button = new QPushButton(QIcon(tr(":/images/")+QString(keyboardLayout[i].image)), tr(""), &background);
button->setMinimumSize(QSize(key_width, KEY_HEIGHT));
button->setMaximumSize(QSize(key_width, KEY_HEIGHT));
button->setIconSize(button->size());
/* geometry of button is relative to its parent, ie 'background' : */
button->setGeometry(QRect(offset_h, offset_v, button->width(), button->height()));
button->show();
mapper->setMapping(button, keyboardLayout[i].key);
connect(button, SIGNAL(clicked()), mapper, SLOT(map()));
offset_h += (key_width+MARGIN_H);
}
}
void Keyboard::buttonClicked(int key)
{
if (key == '\b') /* backspace */
emit specialKeyClicked(key);
else
emit keyClicked(QString(key));
}
Keyboard::~Keyboard()
{
disconnect();
delete mapper;
}
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