How to Develop a Calendar Widget.

BorahAnshuman · wrote on 19 Apr 2011, 06:59

hello andre

i had implement ur code like this..

@QUrl url = QUrl::fromEncoded("http://baytrail.abag.ca.gov/vtour/map4/access/CyteHils/Trail_to_Red_Hill_Summit.JPG");

safedate.setProperty(QTextCharFormat::BackgroundImageUrl,QVariant(url));//safedate is an object of QTextCharFormat

ui->calendarWidget->setDateTextFormat(QDate(2011,4,19),startdate);@

but its not working..is anything missing here

regards
Anshuman

imrrk · wrote on 19 Apr 2011, 07:00

hello andre,have you observed in the qcalendarwidget,at first time it shows the currentdate,but when we select a different date ,their is no such marker which tells that it is a currentdate,i mean to say that the currentdate should be underlined so that when a user selects a different date ,the currentdate can be identified by the underlined mark.

Regards
imrrk

andre · wrote on 19 Apr 2011, 07:06

[quote author="BorahAnshuman" date="1303196388"]hello andre

i had implement ur code like this..

@QUrl url = QUrl::fromEncoded("http://baytrail.abag.ca.gov/vtour/map4/access/CyteHils/Trail_to_Red_Hill_Summit.JPG");

safedate.setProperty(QTextCharFormat::BackgroundImageUrl,QVariant(url));//safedate is an object of QTextCharFormat

ui->calendarWidget->setDateTextFormat(QDate(2011,4,19),startdate);@

but its not working..is anything missing here

regards
Anshuman[/quote]

What is missing, is that you did not read beyond the code snippet I posted. You know, the part that states that the code snippet is not going to work, as documented for QCalendarWidget, and that you need other ways of doing this.

andre · wrote on 19 Apr 2011, 07:11

[quote author="imrrk" date="1303196445"]hello andre,have you observed in the qcalendarwidget,at first time it shows the currentdate,but when we select a different date ,their is no such marker which tells that it is a currentdate,i mean to say that the currentdate should be underlined so that when a user selects a different date ,the currentdate can be identified by the underlined mark.

Regards
imrrk
[/quote]
So, why don't you set a different QTextCharFormat for the current date then? You can change the font using that class...

imrrk · wrote on 19 Apr 2011, 07:19

ok thanks andre,i got it

BorahAnshuman · wrote on 19 Apr 2011, 08:38

Hello andre

As i am very new to qt so can u give me a brief idea of hw to implement paintCell to do the rendering of each cell...

with regards
Anshuman

andre · wrote on 19 Apr 2011, 08:50

Why don't you use the QCalendarWidget sources as inspiration for that?

BorahAnshuman · wrote on 19 Apr 2011, 09:22

hello andre

thanks for ur reply..

Actually i hv been go through that source code..but i havent found any idea regarding setting of background image in particular cell..and as u said that to set an image in a particular cell we hv to implement paintcell to do the rendering of each cell…but hw this can be done..can u give me an idea for that

with regards
Anshuman

goetz · wrote on 19 Apr 2011, 09:59

The signature of the method is:

@
QCalendarWidget::paintCell(QPainter *painter, const QRect &rect, const QDate &date)
@

So, I suggest you have a look at QPainter's drawImage(), drawPixmap() and drawPicture() methods.

andre · wrote on 19 Apr 2011, 10:00

You know what? Perhaps you should look into this yourself. Did you look in the documentation for QPainter?

imrrk · wrote on 19 Apr 2011, 10:06

hey volker through paintcell method can we add image to the particular cells in calendarwidget?.in my project i have directly taken the qcalendarwidget and dragged it in the form,so how i should implement it.

regards
imrrk

goetz · wrote on 19 Apr 2011, 10:11

[quote author="imrrk" date="1303207582"]hey volker through paintcell method can we add image to the particular cells in calendarwidget..
[/quote]

You know the meaning of the sign "?", don't you? If so, then please use it appropriately, if not, please look up in google.

And now, please read the documentation on QPainter. We will not do this for you, this is your part! It has all the information you need and to start playing around.

ZapB · wrote on 19 Apr 2011, 10:12

Please just try it. Andre and Volker are not your personal assistants. They have even told you which QPainter calls to read up on. The clue is in the name QPainter::drawPixmap()!

imrrk · wrote on 19 Apr 2011, 10:16

i know volker,fine,i will read the doc and get back to you with my code..

regards
imrrk

BorahAnshuman · wrote on 19 Apr 2011, 10:16

hello volker

actually i had read about QPainters but doesnt know hw to implement it..from where to start

i had given a code,,u plz check it whether its ok to work or not..

@QPainter* pPainter = new QPainter(this);
pPainter->drawPixmap(rect(), QPixmap(":/images/bg.png"));@

after that what should i do cant find it
regards

Anshuman

goetz · wrote on 19 Apr 2011, 10:37

Read the docs. If you really do so, you will find a link to an example that even contains drawing pixmaps. Grab it, play with it, adapt it. This all is really basic stuff, explained multiple times in the docs with uncountable examples in the docs. We're not going to do your homework!

andre · wrote on 19 Apr 2011, 10:40

imrrk and/or Anshuman:

I am really done with this thread. Please do all of us here, including first and foremost yourself, a big favor, and get yourself enrolled in a good programming course in C++. If they use Qt, than that is a bonus, but that is not even needed. Otherwise, perhaps you should draft up a document describing what you want to achieve (not how you want to do that), and get yourself a consultant to do the work for you. I think a good one can do what you have achieved in the course of weeks of postings and copy/pasting snippets you have managed to beg of the contributers here in a matter of an hour or so. As it stands, I doubt you are able to ever complete whatever project you are on, and I feel spending any more time on this issue is a waste.

All the best of luck, I am signing off.

BorahAnshuman · wrote on 19 Apr 2011, 10:58

ok..volker and /andre..thanks..i will try my level b est in doing so..but if any doubt arises i will ask u..

with regards
Anshuman

goetz · wrote on 19 Apr 2011, 11:28

[quote author="BorahAnshuman" date="1303210680"]ok..volker and /andre..thanks..i will try my level b est in doing so..but if any doubt arises i will ask u..

with regards
Anshuman[/quote]

You (in plural or singular meaning - choose whatever you want) may ask, but don't expect any further answers. I step out too.

BorahAnshuman · wrote on 20 Apr 2011, 10:08

Hello Volker

as per ur suggestion i hv read QPainter class in QT..as per ur discussion i hv tried this code in setting backgroundImage in a particular cell in CalenderWidget but an error occur..cn u please check the error..

@void PainterApp::paintEvent(QPaintEvent *)
{
QPainter painter(this);
QRectF target(30.0, 40.0, 80.0, 60.0);
QRectF source(30.0, 40.0, 70.0, 40.0);
QImage image("C:/QTWork/back-icon.png");

  painter.drawImage(target, image, source);

  ui->calendarWidget->paintCell(painter,target,QDate::currentDate());

 painter.end();

}@

regards
Anshuman