1 files changed, 152 insertions, 0 deletions
diff --git a/Keyboard.cpp b/Keyboard.cpp
new file mode 100644
index 0000000..447f6c7
--- /dev/null
+++ b/Keyboard.cpp
@@ -0,0 +1,152 @@
+/**
+  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;
+}