* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:  CalenMonthView implementation.

 *

 */

//system includes

#include <QtGui>

#include <xqsettingsmanager.h>

#include <xqsettingskey.h>

#include <hbapplication.h>

#include <hbmainwindow.h>

#include <hbmenu.h>

#include <hbaction.h>

#include <hbview.h>

#include <hblabel.h>

#include <hbframeitem.h>

#include <hbcolorscheme.h>

#include <agendautil.h>

#include <agendaentry.h>

//user includes

#include "calenservices.h"

#include "calennativeview.h"

#include "calenview.h"

#include "calenmonthdata.h"

#include "calencontext.h"

#include "calenagendautils.h"

#include "hb_calencommands.hrh" 

#include "calendateutils.h"

#include "calenmonthgrid.h"

#include "calenpreviewpane.h"

#include "calendocloader.h"

#include "calenthicklinesdrawer.h"

#include "calencommon.h"

#include "CalendarInternalCRKeys.h"

/*!

 \class CalenMonthView

 Class implementing calendar month view

 */

/*!

 Default constructor.

 */

CalenMonthView::CalenMonthView(MCalenServices &services) :

	CalenNativeView(services), mAgendaUtil(services.agendaInterface()), 

	mGoToTodayAction(0)

{

	mIsWeekNumbersShown = 0;

	mOrientation = mServices.MainWindow().orientation();

	// Read the date from the context

	mDate = mServices.Context().focusDateAndTimeL();

	mCurrentDay = mDate;

	// Create the settings manager instance and settings key for week number

	mSettingsManager = new XQSettingsManager(this);

	mWeekNumberCenrepKey

	        = new XQSettingsKey(XQSettingsKey::TargetCentralRepository,

	                            KCRUidCalendar.iUid, KCalendarWeekViewTitle);

	mLocale = HbExtendedLocale::system();

	mFirstWeekLabel = NULL;

	mIsPrevPaneGesture = false;

}

/*!

 Destructor.

 */

CalenMonthView::~CalenMonthView()

{

}

/*!

 Called by the CalenViewManager after loading the view from the docml.

 The initializaion/setup of the view is done here. 

 */

void CalenMonthView::setupView(CalenDocLoader *docLoader)

{

	mDocLoader = docLoader;

	mTitleLabel

	        = qobject_cast<HbLabel *> (

								   mDocLoader->findWidget(CALEN_MONTH_TITLE));

	mDayNameWidget

	        = qobject_cast<CalenThickLinesDrawer *> (

													mDocLoader->findWidget(

													CALEN_DAYNAMES_WIDGET));

	// Get all the seven day labels

	mFirstDayLabel

	        = qobject_cast<HbLabel *> (

						mDocLoader->findWidget(CALEN_MONTVIEW_FIRST_DAY_LABEL));

	mSecondDayLabel

	        = qobject_cast<HbLabel *> (

					   mDocLoader->findWidget(CALEN_MONTVIEW_SECOND_DAY_LABEL));

	mThirdDayLabel

	        = qobject_cast<HbLabel *> (

					   mDocLoader->findWidget(CALEN_MONTVIEW_THIRD_DAY_LABEL));

	mFourthDayLabel

	        = qobject_cast<HbLabel *> (

					   mDocLoader->findWidget(CALEN_MONTVIEW_FOURTH_DAY_LABEL));

	mFifthDayLabel

	        = qobject_cast<HbLabel *> (

					   mDocLoader->findWidget(CALEN_MONTVIEW_FIFTH_DAY_LABEL));

	mSixthDayLabel

	        = qobject_cast<HbLabel *> (

					   mDocLoader->findWidget(CALEN_MONTVIEW_SIXTH_DAY_LABEL));

	mSeventhDayLabel

	        = qobject_cast<HbLabel *> (

					mDocLoader->findWidget(CALEN_MONTVIEW_SEVENTH_DAY_LABEL));

	// Set the short day names to these labels

	// TODO: Need to read start of the week from the locale

	// and update the labels accortdingly

	int startOfDay = mLocale.startOfWeek();

	mFirstDayLabel->setPlainText(hbTrId("txt_calendar_grid_day_mo"));

	mSecondDayLabel->setPlainText(hbTrId("txt_calendar_grid_day_tu"));

	mThirdDayLabel->setPlainText(hbTrId("txt_calendar_grid_day_we"));

	mFourthDayLabel->setPlainText(hbTrId("txt_calendar_grid_day_th"));

	mFifthDayLabel->setPlainText(hbTrId("txt_calendar_grid_day_fr"));

	mSixthDayLabel->setPlainText(hbTrId("txt_calendar_grid_day_sa"));

	mSeventhDayLabel->setPlainText(hbTrId("txt_calendar_grid_day_su"));

	// Get the weeknumber widget

	mWeekNumberWidget

			= qobject_cast<CalenThickLinesDrawer *> (

							 mDocLoader->findWidget(CALEN_WEEKNUMBERS_WIDGET));

	// Disable the item so that line seperator doesnt gets drawn by default

	mWeekNumberWidget->setEnabled(false);

	// Get the month grid

	mMonthGrid

	        = qobject_cast<CalenMonthGrid *> (

									mDocLoader->findWidget(CALEN_MONTHGRID));

	mCurrPaneParent = qobject_cast<HbWidget *> (

			mDocLoader->findWidget(CALEN_CURRPREVIEWPARENT));

	// Get current day preview pane widget

	mCurrPreviewPane

			= static_cast<CalenPreviewPane *> (

					docLoader->findWidget(CALEN_CURRPREVIEWPANE));

	//mCurrPreviewPane->setParent(mCurrPaneParent);

	mCurrPaneParent->setFlag(QGraphicsItem::ItemClipsChildrenToShape, true);

	HbLabel* currPaneNoEntriesLabel = static_cast<HbLabel *> (

			docLoader->findWidget(CALEN_NOENTRIES_LABEL_CURR));

	mCurrPreviewPane->setView(this);

	mCurrPreviewPane->setNoEntriesLabel(currPaneNoEntriesLabel);

	mPrevPaneParent = qobject_cast<HbWidget *> (

			mDocLoader->findWidget(CALEN_PREVPREVIEWPARENT));

	// Get previous day preview pane widget

	mPrevPreviewPane

			= static_cast<CalenPreviewPane *> (

					docLoader->findWidget(CALEN_PREVPREVIEWPANE));

	//mPrevPreviewPane->setParent(mPrevPaneParent);

	mPrevPaneParent->setFlag(QGraphicsItem::ItemClipsChildrenToShape, true);

	HbLabel* prevPaneNoEntriesLabel = static_cast<HbLabel *> (

			docLoader->findWidget(CALEN_NOENTRIES_LABEL_PREV));

	mPrevPreviewPane->setView(this);

	mPrevPreviewPane->setNoEntriesLabel(prevPaneNoEntriesLabel);

	mPrevPaneParent->setVisible(false);

	mNextPaneParent = qobject_cast<HbWidget *> (

			mDocLoader->findWidget(CALEN_NEXTPREVIEWPARENT));

	// Get next day preview pane widget

	mNextPreviewPane

			= static_cast<CalenPreviewPane *> (

					docLoader->findWidget(CALEN_NEXTPREVIEWPANE));

	//mNextPreviewPane->setParent(mNextPaneParent);

	mNextPaneParent->setFlag(QGraphicsItem::ItemClipsChildrenToShape, true);

	HbLabel* nextPaneNoEntriesLabel = static_cast<HbLabel *> (

			docLoader->findWidget(CALEN_NOENTRIES_LABEL_NEXT));

	mNextPreviewPane->setView(this);

	mNextPreviewPane->setNoEntriesLabel(nextPaneNoEntriesLabel);

	mNextPaneParent->setVisible(false);

	mMonthGridPlusWeekNumWidget

	        = qobject_cast<HbWidget *> (

					mDocLoader->findWidget(CALEN_MONTHGRID_WEEKNUMBERS_WIDGET));

	mMonthGrid->setView(this);

	// Connect to the menu actions

	HbAction

	        *newEventAction =

	                qobject_cast<HbAction *> (

						mDocLoader->findObject(CALEN_MONTVIEW_MENU_NEWEVENT));

	connect(newEventAction, SIGNAL(triggered()), this, SLOT(createEditor()));

	mGoToTodayAction =

	                qobject_cast<HbAction *> (

							mDocLoader->findObject(CALEN_MONTVIEW_MENU_GOTOTODAY));

	connect(mGoToTodayAction, SIGNAL(triggered()), this, SLOT(goToToday()));

	HbAction

	        *goToDateAction =

	                qobject_cast<HbAction *> (

						mDocLoader->findObject(CALEN_MONTVIEW_MENU_GOTODATE));

	connect(goToDateAction, SIGNAL(triggered()), this, SLOT(goToDate()));

	// TODO: Need to move this to docml

	// Set the title to the submenu

	HbMenu

	        *deleteSubMenu =

	                qobject_cast<HbMenu *> (

						mDocLoader->findObject(CALEN_MONTVIEW_DELETE_SUBMENU));

	deleteSubMenu->setTitle(hbTrId("txt_calendar_opt_delete_entries"));

	HbAction

	        *beforeDateAction =

	                qobject_cast<HbAction *> (

						mDocLoader->findObject(CALEN_MONTVIEW_MENU_BEFOREDATE));

	connect(beforeDateAction, SIGNAL(triggered()), this,

	        SLOT(deleteBeforeDate()));

	HbAction

	        *allEntriesAction =

	                qobject_cast<HbAction *> (

						mDocLoader->findObject(CALEN_MONTVIEW_MENU_ALLENTRIES));

	connect(allEntriesAction, SIGNAL(triggered()), this,

	        SLOT(deleteAllEntries()));

	HbAction

	        *settingsAction =

	                qobject_cast<HbAction *> (

						mDocLoader->findObject(CALEN_MONTVIEW_MENU_SETTINGS));

	connect(settingsAction, SIGNAL(triggered()), this,

	        SLOT(launchSettingsView()));

	// Connect to the signal of change orientation.

	connect(&(mServices.MainWindow()),

	        SIGNAL(orientationChanged(Qt::Orientation)), this,

	        SLOT(changeOrientation(Qt::Orientation)));

	mIsFirstTimeLoad = true;

	// Add background items to all the widgets

	addBackgroundFrame();

}

/*!

 Adds the week numbers to the weeknumber widget

 */

void CalenMonthView::addWeekNumbers()

{

	if (!mFirstWeekLabel) {

	// Get all the six week labels

	mFirstWeekLabel

			= qobject_cast<HbLabel *> (

					mDocLoader->findWidget(CALEN_MONTVIEW_FIRST_WEEK_LABEL));

	mSecondWeekLabel

			= qobject_cast<HbLabel *> (

					mDocLoader->findWidget(CALEN_MONTVIEW_SECOND_WEEK_LABEL));

	mThirdWeekLabel

			= qobject_cast<HbLabel *> (

					mDocLoader->findWidget(CALEN_MONTVIEW_THIRD_WEEK_LABEL));

	mFourthWeekLabel

			= qobject_cast<HbLabel *> (

					mDocLoader->findWidget(CALEN_MONTVIEW_FOURTH_WEEK_LABEL));

	mFifthWeekLabel

			= qobject_cast<HbLabel *> (

					mDocLoader->findWidget(CALEN_MONTVIEW_FIFTH_WEEK_LABEL));

	mSixthWeekLabel

			= qobject_cast<HbLabel *> (

					mDocLoader->findWidget(CALEN_MONTVIEW_SIXTH_WEEK_LABEL));

	}

	// Calculate the week numbers and set them to the week labels

	updateWeekNumGridModel();

	// Get the day names layout

	QGraphicsLinearLayout *dayNamesLayout =

	        static_cast<QGraphicsLinearLayout *> (mDayNameWidget->layout());

	if (KCalenDaysInWeek == dayNamesLayout->count()) {

		// Add one item with text "Wk" in the day name grid

		HbLabel *label = new HbLabel(mDayNameWidget);

		// Set the attributes same as that of other day names to make it

		// look similar to the day names

		label->setPlainText(hbTrId("txt_calendar_grid_day_wk"));

		label->setFont(mFirstDayLabel->font());

		label->setFontSpec(mFirstDayLabel->fontSpec());

		label->setAlignment(mFirstDayLabel->alignment());

		label->setElideMode(mFirstDayLabel->elideMode());

		label->setZValue(mFirstDayLabel->zValue());

		label->setPreferredHeight(mFirstDayLabel->preferredHeight());

		label->setMinimumHeight(mFirstDayLabel->minimumHeight());

		label->setMaximumHeight(mFirstDayLabel->maximumHeight());

		// Add this label into layout

		dayNamesLayout->insertItem(0, label);

		dayNamesLayout->invalidate();

		dayNamesLayout->activate();

	}

	// Now insert the weekNumber Grid

	QGraphicsLinearLayout *layout = static_cast<QGraphicsLinearLayout *> 

										(mMonthGridPlusWeekNumWidget->layout());

	if (1 == layout->count()) {

		layout->insertItem(0, mWeekNumberWidget);

		// Enable the item so that line seperator gets drawn

		mWeekNumberWidget->setEnabled(true);

		layout->invalidate();

		layout->activate();

	}

}

/*!

 Removes the week numbers from the view

 */

void CalenMonthView::removeWeekNumbers()

{

	// Remove the week number grid if setting is off

	QGraphicsLinearLayout *layout = static_cast<QGraphicsLinearLayout *> 

									(mMonthGridPlusWeekNumWidget->layout());

	if (2 == layout->count()) {

		layout->removeItem(mWeekNumberWidget);

		// Disable the item as we are removing it from the layout

		mWeekNumberWidget->setEnabled(false);

		layout->invalidate();

		layout->activate();

		// Clear the week labels

		mFirstWeekLabel->clear();

		mSecondWeekLabel->clear();

		mThirdWeekLabel->clear();

		mFourthWeekLabel->clear();

		mFifthWeekLabel->clear();

		mSixthWeekLabel->clear();

		// Get the day names layout

		QGraphicsLinearLayout *dayNamesLayout =

		        static_cast<QGraphicsLinearLayout *> (mDayNameWidget->layout());

		if (dayNamesLayout->count() == KCalenDaysInWeek + 1) {

			// Remove the empty item in the day name grid

			QGraphicsLayoutItem *item = dayNamesLayout->itemAt(0);

			dayNamesLayout->removeAt(0);

			delete item;

			dayNamesLayout->invalidate();

			dayNamesLayout->activate();

		}

	}

}

/*!

 Sets the background frame for the month view

 */

void CalenMonthView::addBackgroundFrame()

{

    // Set the background items for all the widgets

    HbFrameItem* frame = NULL;

    if (mMonthGrid) {

        // The grid background

        frame = new HbFrameItem(this);

        frame->frameDrawer().setFrameType(HbFrameDrawer::NinePieces);

        frame->frameDrawer().setFrameGraphicsName("qtg_fr_cal_monthgrid_bg");

        mMonthGrid->setBackgroundItem(frame->graphicsItem(), -2);

    }

    if (mTitleLabel) {

        // The month title

        frame = new HbFrameItem(this);

        frame->frameDrawer().setFrameType(HbFrameDrawer::ThreePiecesHorizontal);

        frame->frameDrawer().setFrameGraphicsName("qtg_fr_cal_monthgrid_title_bg");

        mTitleLabel->setBackgroundItem(frame->graphicsItem(), -2);

    }

}

/*!

 Calculates the week numbers and sets them to the week labels

 */

void CalenMonthView::updateWeekNumGridModel()

{

	// Get the visible date

	QDateTime firstVisibleDate = mFirstDayOfGrid.addDays(KCalenDaysInWeek

	        * mNumOfRowsInPrevMonth);

	// Go to the last day so that we get the proper week number for the first

	// week of January

	mWeekNumbers.clear();

	// get the proper week numbers

	for (int i = 0; i < KNumOfVisibleRows; i++) {

		// Get the week number

		QDateTime day = firstVisibleDate.addDays((KCalenDaysInWeek * i));

		long weekNumber(day.date().weekNumber());

		mWeekNumbers.append(weekNumber);

	}

	// Get the week day color from the theme

	QColor weekDayColor = HbColorScheme::color("qtc_cal_week_day");

	// Update the week labels text

	QString text = QString::number(mWeekNumbers.at(0));

	mFirstWeekLabel->setPlainText(text);

	mFirstWeekLabel->setTextColor(weekDayColor);

	text = QString::number(mWeekNumbers.at(1));

	mSecondWeekLabel->setPlainText(text);

	mSecondWeekLabel->setTextColor(weekDayColor);

	text = QString::number(mWeekNumbers.at(2));

	mThirdWeekLabel->setPlainText(text);

	mThirdWeekLabel->setTextColor(weekDayColor);

	text = QString::number(mWeekNumbers.at(3));

	mFourthWeekLabel->setPlainText(text);

	mFourthWeekLabel->setTextColor(weekDayColor);

	text = QString::number(mWeekNumbers.at(4));

	mFifthWeekLabel->setPlainText(text);

	mFifthWeekLabel->setTextColor(weekDayColor);

	text = QString::number(mWeekNumbers.at(5));

	mSixthWeekLabel->setPlainText(text);

	mSixthWeekLabel->setTextColor(weekDayColor);

}

/*!

 Populates the month view with today as focussed item

 */

void CalenMonthView::goToToday()

{

	QDateTime today = CalenDateUtils::today();

	// First check if we are not already

	// showing today's month view

	if (mDate == today) {

		return;

	}

	// Set the context and repopulate the view

	MCalenContext &context = mServices.Context();

	context.setFocusDateAndTimeL(today, KCalenMonthViewUidValue);

	mServices.IssueCommandL(ECalenStartActiveStep);

}

/*!

 Populates the view

 */

void CalenMonthView::doPopulation()

{

	if (!mIsFirstTimeLoad) {

		Qt::Orientation orientation = mServices.MainWindow().orientation();

		if (mOrientation != orientation) {

			mOrientation = orientation;

			handleChangeOrientation();

		}

	}

	mIsFirstTimeLoad = false;

	// prepare for the population like reading the date frm the context 

	// calculating the start of the grid etc.,

	prepareForPopulation();

	// fetch list of required calendar instances

	populateWithInstanceView();

	populatePreviewPane(mDate);

	// Create the grid items with proper dates

	createGrid();

	// Complete the population

	completePopulation();

	// Population is complete, inform it

	populationComplete();

	// Start the auto scroll on current preview pane

	mCurrPreviewPane->startAutoScroll();

}

/*!

 Reads the date from the context and calculates the grid item dates

 */

void CalenMonthView::prepareForPopulation()