whellvalue/tpvs17/lpReport/qtimedlg.h

#ifndef QTIMEDLG_H
#define QTIMEDLG_H

#include <QDialog>
#include "ui_qtimedlg.h"
#include <QDate>
#include <QTime>
#include <QBasicTimer>
#include <QTime>
#include <QKeyEvent>
#include <QAction>
#include <QTimeLine>
#include <QPainter>
class Digits : public QWidget
{
	Q_OBJECT

public:

	/*Define three transition modes of the digital clock*/
	enum {
		Slide,
		Flip,
		Rotate
	};

	Digits(QWidget *parent)
		: QWidget(parent)
		, m_number(0)
		, m_transition(Slide)
	{
		setAttribute(Qt::WA_OpaquePaintEvent, true);
		//Widget paints all its pixels when it receives a paint event

		setAttribute(Qt::WA_NoSystemBackground, true);
		//Indicates that the widget has no background, i.e. when the widget receives paint events, the background is not automatically repainted.

		connect(&m_animator, SIGNAL(frameChanged(int)), SLOT(update()));
		//start animation

		m_animator.setFrameRange(0, 100);
		m_animator.setDuration(600);
		//Construct a 0.6-second timeline with a frame range of 0 - 100

		m_animator.setCurveShape(QTimeLine::EaseInOutCurve);
		//starts growing slowly, then runs steadily, then grows slowly again
	}

	/*Set transition when time changed*/
	void setTransition(int tr) {
		m_transition = tr;
	}

	/*Get transition mode*/
	int transition() const {
		return m_transition;
	}

	/*Set hours and minutes*/
	void setNumber(int n) {
		if (m_number != n) {
			m_number = qBound(0, n, 99);
			preparePixmap();
			update();
		}
	}

	/*Flip to next state*/
	void flipTo(int n) {
		if (m_number != n) {
			m_number = qBound(0, n, 99);
			m_lastPixmap = m_pixmap;
			preparePixmap();
			m_animator.stop();
			m_animator.start();
		}
	}

protected:

	/*Draw the main frame of the digits area*/
	void drawFrame(QPainter *p, const QRect &rect) {
		p->setPen(Qt::NoPen);
		QLinearGradient gradient(rect.topLeft(), rect.bottomLeft());
		//Set linear gradient area

		gradient.setColorAt(0.00, QColor(245, 245, 245));
		gradient.setColorAt(0.49, QColor(192, 192, 192));
		gradient.setColorAt(0.51, QColor(245, 245, 245));
		gradient.setColorAt(1.00, QColor(192, 192, 192));
		//Creates stop points at the given position with the given color

		p->setBrush(gradient);
		QRect r = rect;
		p->drawRoundedRect(r, 15, 15, Qt::RelativeSize);
		/*
		Draws outer rectangle rect with rounded corners.
		Qt::RelativeSize specifies the size relative to the bounding rectangle,
		typically using percentage measurements.
		*/

		r.adjust(1, 4, -1, -4);
		//Adds 1, 4, -1 and -4 respectively to the existing coordinates of the rectangle

		p->setPen(QColor(181, 181, 181));
		p->setBrush(Qt::NoBrush);
		p->drawRoundedRect(r, 15, 15, Qt::RelativeSize);
		//Draws inner rectangle rect with rounded corners.

		p->setPen(QColor(159, 159, 159));
		int y = rect.top() + rect.height() / 2 - 1;
		p->drawLine(rect.left(), y, rect.right(), y);
		//Draws the mid-line from (rect.left(), y) to (rect.right(), y) and sets the current pen position to (rect.right(), y)

	}

	/*Draw the digits*/
	QPixmap drawDigits(int n, const QRect &rect) {

		int scaleFactor = 2;
#if defined(Q_OS_SYMBIAN) || defined(Q_OS_WINCE_WM)
		if (rect.height() > 240)
			scaleFactor = 1;
#endif

		QString str = QString::number(n);
		if (str.length() == 1)
			str.prepend("0");
		//Ensure it is double-digit

		QFont font;
		font.setFamily("Helvetica");
		int fontHeight = scaleFactor * 0.55 * rect.height();
		font.setPixelSize(fontHeight);
		//Sets the font size to pixelSize pixels

		font.setBold(true);

		QPixmap pixmap(rect.size() * scaleFactor);
		pixmap.fill(Qt::transparent);

		QLinearGradient gradient(QPoint(0, 0), QPoint(0, pixmap.height()));
		//Constructs a linear gradient with interpolation area between (0,0) and (0,pixmap.height())

		gradient.setColorAt(0.00, QColor(128, 128, 128));
		gradient.setColorAt(0.49, QColor(64, 64, 64));
		gradient.setColorAt(0.51, QColor(128, 128, 128));
		gradient.setColorAt(1.00, QColor(16, 16, 16));
		//Creates stop points at the given position with the given color

		QPainter p;
		p.begin(&pixmap);
		p.setFont(font);
		QPen pen;
		pen.setBrush(QBrush(gradient));
		//Set penbrush with linergrident

		p.setPen(pen);
		p.drawText(pixmap.rect(), Qt::AlignCenter, str);
		//Draws the digit number(str here) within the provided rectangle

		p.end();

		return pixmap.scaledToWidth(width(), Qt::SmoothTransformation);
		//Returns a scaled copy of the image which is transformed using bilinear filtering
	}

	/*prepare the pixmap  */
	void preparePixmap() {
		m_pixmap = QPixmap(size());
		m_pixmap.fill(Qt::transparent);
		//Fills the pixmap with the given transparent black value (i.e., QColor(0, 0, 0, 0))

		QPainter p;
		p.begin(&m_pixmap);
		p.drawPixmap(0, 0, drawDigits(m_number, rect()));
		//Draws the given digits-pixmap at position (0, 0)

		p.end();
	}

	/*define a resize event*/
	void resizeEvent(QResizeEvent*) {
		preparePixmap();
		update();//Causes a paintEvent() call

	}

	/*Paint the static state*/
	void paintStatic() {
		QPainter p(this);
		p.fillRect(rect(), Qt::black);
		//Fill the widget rec with black color

		int pad = width() / 10;
		drawFrame(&p, rect().adjusted(pad, pad, -pad, -pad));
		p.drawPixmap(0, 0, m_pixmap);
	}

	/*Paint the slide state*/
	void paintSlide() {
		QPainter p(this);
		p.fillRect(rect(), Qt::black);

		int pad = width() / 10;
		QRect fr = rect().adjusted(pad, pad, -pad, -pad);
		drawFrame(&p, fr);
		p.setClipRect(fr);
		//sets the clip region to the given rectangle using the given clip operation

		int y = height() * m_animator.currentFrame() / 100;
		p.drawPixmap(0, y, m_lastPixmap);
		//Draw last-time state pixmap from 0 to height()(Y Coordinate)  in 0.6 second

		p.drawPixmap(0, y - height(), m_pixmap);
		//Draw current-time state pixmap from -height() to 0 (Y Coordinate) in 0.6 second
	}

	/*Paint the flip state*/
	void paintFlip() {
		QPainter p(this);
#if !defined(Q_OS_SYMBIAN) && !defined(Q_OS_WINCE_WM)
		p.setRenderHint(QPainter::SmoothPixmapTransform, true);
		p.setRenderHint(QPainter::Antialiasing, true);
#endif
		p.fillRect(rect(), Qt::black);

		int hw = width() / 2;
		int hh = height() / 2;

		// behind is the new pixmap
		int pad = width() / 10;
		QRect fr = rect().adjusted(pad, pad, -pad, -pad);
		drawFrame(&p, fr);
		p.drawPixmap(0, 0, m_pixmap);

		int index = m_animator.currentFrame();

		if (index <= 50) {

			// the top part of the old pixmap is flipping
			int angle = -180 * index / 100;
			QTransform transform;
			transform.translate(hw, hh);
			//Moves the coordinate system to the center of widget

			transform.rotate(angle, Qt::XAxis);
			//Rotates the coordinate system counterclockwise by angle about the X axis

			p.setTransform(transform);
			drawFrame(&p, fr.adjusted(-hw, -hh, -hw, -hh));
			p.drawPixmap(-hw, -hh, m_lastPixmap);

			// the bottom part is still the old pixmap
			p.resetTransform();
			p.setClipRect(0, hh, width(), hh);
			//Enables clipping, and sets the clip region to the rectangle beginning at (0, hh) with the given width and height

			drawFrame(&p, fr);
			p.drawPixmap(0, 0, m_lastPixmap);
		}
		else {

			p.setClipRect(0, hh, width(), hh);

			// the bottom part is still the old pixmap
			drawFrame(&p, fr);
			p.drawPixmap(0, 0, m_lastPixmap);

			// the bottom part of the new pixmap is flipping
			int angle = 180 - 180 * m_animator.currentFrame() / 100;
			QTransform transform;
			transform.translate(hw, hh);
			transform.rotate(angle, Qt::XAxis);
			p.setTransform(transform);
			drawFrame(&p, fr.adjusted(-hw, -hh, -hw, -hh));
			p.drawPixmap(-hw, -hh, m_pixmap);

		}

	}

	/*Paint the rotate state*/
	void paintRotate() {
		QPainter p(this);

		int pad = width() / 10;
		QRect fr = rect().adjusted(pad, pad, -pad, -pad);
		drawFrame(&p, fr);
		p.setClipRect(fr);

		int angle1 = -180 * m_animator.currentFrame() / 100;
		int angle2 = 180 - 180 * m_animator.currentFrame() / 100;
		int angle = (m_animator.currentFrame() <= 50) ? angle1 : angle2;
		QPixmap pix = (m_animator.currentFrame() <= 50) ? m_lastPixmap : m_pixmap;

		QTransform transform;
		transform.translate(width() / 2, height() / 2);
		transform.rotate(angle, Qt::XAxis);

		p.setTransform(transform);
		p.setRenderHint(QPainter::SmoothPixmapTransform, true);
		p.drawPixmap(-width() / 2, -height() / 2, pix);
	}

	void paintEvent(QPaintEvent *event) {
		Q_UNUSED(event);
		if (m_animator.state() == QTimeLine::Running) {
			if (m_transition == Slide)
				paintSlide();
			if (m_transition == Flip)
				paintFlip();
			if (m_transition == Rotate)
				paintRotate();
		}
		else {
			paintStatic();
		}
	}

private:
	int m_number;//number to set to digits

	int m_transition;//transition mode(change effect)

	QPixmap m_pixmap;//current time pixmap

	QPixmap m_lastPixmap;//next state time pixmap

	QTimeLine m_animator;
	//used to animate a GUI control by calling a slot periodically
	//The timeline's duration describes for how long the animation will run
	//connect the frameChanged() signal to a suitable slot in the widget you wish to animate
};
class QClockDlg : public QWidget
{
	Q_OBJECT

public:
	QClockDlg(QWidget *parent = 0) : QWidget(parent)
	{
		m_Ihour = 0;
		m_Iminute = 0;
		m_hour = new Digits(this);
		m_hour->show();
		m_minute = new Digits(this);
		m_minute->show();

		QPalette pal = palette();
		pal.setColor(QPalette::Window, Qt::gray);
		//Sets the color used for the given color role, in all color groups, to the specified solid color.

		setPalette(pal);
		QAction *slideAction = new QAction("&Slide", this);
		QAction *flipAction = new QAction("&Flip", this);
		QAction *rotateAction = new QAction("&Rotate", this);
		connect(slideAction, SIGNAL(triggered()), SLOT(chooseSlide()));
		connect(flipAction, SIGNAL(triggered()), SLOT(chooseFlip()));
		connect(rotateAction, SIGNAL(triggered()), SLOT(chooseRotate()));
#if defined(Q_OS_SYMBIAN) || defined(Q_OS_WINCE_WM)
		menuBar()->addAction(slideAction);
		menuBar()->addAction(flipAction);
		menuBar()->addAction(rotateAction);
#else
		addAction(slideAction);
		addAction(flipAction);
		addAction(rotateAction);
		setContextMenuPolicy(Qt::ActionsContextMenu);
		//Shows a context menu(right click)
#endif
	}
	void InitTime(int hour, int min){
		m_hour->setNumber(hour);
		m_minute->setNumber(min);
	}
	void SetTime(int hour, int min){

		m_hour->flipTo(hour);
		m_minute->flipTo(min);
		m_Ihour = hour;
		m_Iminute = min;
	}
private:
	QBasicTimer m_ticker;
	Digits *m_hour;
	Digits *m_minute;
protected:
	void resizeEvent(QResizeEvent*) {
		int digitsWidth = width() / 2;
		int digitsHeight = digitsWidth * 1.2;

		int y = (height() - digitsHeight) / 3;

		m_hour->resize(digitsWidth, digitsHeight);
		m_hour->move(0, y);

		m_minute->resize(digitsWidth, digitsHeight);
		m_minute->move(width() / 2, y);
	}

	/*Timer event,receive timer events */
	void timerEvent(QTimerEvent*) {
		updateTime();
	}

	/* Get key press event */
	void keyPressEvent(QKeyEvent *event) {
		if (event->key() == Qt::Key_Right) {
			switchTransition(1);
			event->accept();
		}
		if (event->key() == Qt::Key_Left) {
			switchTransition(-1);
			event->accept();
		}
	}

	private slots:
	void chooseSlide() {
		m_hour->setTransition(0);
		m_minute->setTransition(0);
		updateTime();
	}

	void chooseFlip() {
		m_hour->setTransition(1);
		m_minute->setTransition(1);
		updateTime();
	}

	void chooseRotate() {
		m_hour->setTransition(2);
		m_minute->setTransition(2);
		updateTime();
	}
public:
	int m_Ihour, m_Iminute;
	/*Real-time updates*/
	void updateTime() {
		m_hour->flipTo(m_Ihour);
		m_minute->flipTo(m_Iminute);
	}

	/*Switch transition mode*/
	void switchTransition(int delta) {
		int i = (m_hour->transition() + delta + 3) % 3;
		m_hour->setTransition(i);
		m_minute->setTransition(i);
		updateTime();
	}
};

class QTimeDlg : public QDialog
{
	Q_OBJECT

public:
	QTimeDlg(QWidget *parent = 0);
	~QTimeDlg();
	Q_SLOT void SlotOk();
	Q_SLOT void valuechange(int m_value);
	Q_SLOT void SlotCalWidget(const QDate &m_date);
	void SetDateTime(QDate m_date, QTime m_time);
	void SetDateTime(QDateTime m_datetime);
	void GetDateTime(QDate &m_date, QTime &m_time);
	void GetDateTime(QDateTime &m_datetime);
	Q_SLOT void onCurrentStrChange(QString str);
	Q_SLOT void oncurrentPageChanged(int nyear, int nMonth);
private:
	Ui::QTimeDlg ui;
	QDate m_date;
	QTime m_time;
	QClockDlg *m_clock;
	int m_year, m_month, m_Day;
};

#endif // QTIMEDLG_H