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#include "function_keyboard.h"
#include <qsizepolicy.h>
FunctionKeyboard::FunctionKeyboard(QWidget *parent) :
QFrame(parent), numRows(2), numCols(15),
pressedRow(0), pressedCol(0) {
setSizePolicy(QSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding));
}
FunctionKeyboard::~FunctionKeyboard() {
}
void FunctionKeyboard::paintEvent(QPaintEvent *e) {
QPainter p(this);
p.setClipRect(e->rect());
p.fillRect(0, 0, width(), height(), QColor(255,255,255));
/* those decimals do count! becomes short if use plain int */
for (double i = 0; i <= width(); i += keyWidth) {
p.setPen(QColor(0,0,0));
p.drawLine((int)i, 0, (int)i, height());
}
for (int i = 0; i <= height(); i += height()/numRows) {
p.setPen(QColor(0,0,0));
p.drawLine(0, i, width(), i);
}
}
void FunctionKeyboard::paintKey(int row, int col) {
QPainter p(this);
p.fillRect(QRect(QPoint(col * keyWidth + 1, row * keyHeight + 1),
QPoint((col + 1) * keyWidth - 1, row * keyHeight + keyHeight- 1)),
(pressedRow != -1 && pressedCol != -1 ) ? QColor(97,119,155) : QColor(255,255,255));
}
void FunctionKeyboard::mousePressEvent(QMouseEvent *e) {
pressedRow = e->y() / keyHeight;
pressedCol = e->x() / keyWidth;
paintKey(pressedRow, pressedCol);
}
void FunctionKeyboard::mouseReleaseEvent(QMouseEvent *) {
if (pressedRow != -1 && pressedRow != -1) {
int row = pressedRow; pressedRow = -1;
int col = pressedCol; pressedCol = -1;
paintKey(row, col);
}
}
void FunctionKeyboard::resizeEvent(QResizeEvent*) {
/* set he default font height/width */
QFontMetrics fm=fontMetrics();
keyHeight = fm.lineSpacing() + 2;
keyWidth = (double)width()/numCols;
}
QSize FunctionKeyboard::sizeHint() const {
return QSize(width(), keyHeight * numRows + 1);
}
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