Challenge + confusion while rotating main window with QT?how to do?

[wysota]

[EDIT]: beat to it by wysota..

Sorry...

[savaliya_ambani]

Thanks to all.

I have rotated my main Widget with all other objects indise it.So,now when the application runs ,
it gives me rotated Main Widget which fits to the screen of 480*800.

But,the problem is that when i rotate my Main widget to the 90*,it shows scroll bar on left and
bottom area. Which i dont want. one more thing,when i dont rotate it 90*,it doesnt show the
scroll bar.

i have also verified ,if any object gets out of the Main widget geometry. and its not going out of
that.Does any one know why this is happening? please reply me soon.

[wysota]

But,the problem is that when i rotate my Main widget to the 90*,it shows scroll bar on left and
bottom area. Which i dont want.

So disable them.

i have also verified ,if any object gets out of the Main widget geometry. and its not going out of
that.Does any one know why this is happening? please reply me soon.

Could you express yourself more clearly? I have trouble understanding what you mean.

[savaliya_ambani]

dear wysota,


I am rotating main widget to 90*,and its compulsory.i cant disable it. i have raotated it though QAddProxyWidget,and
QGraphicsView.

Now,when i roate widget to 0* or dont rotate,is shows the widget in an original position. But my requirement is rotating
my widget to 90*. When i rotate it in my PC(qt sdk), it does not generating any scroll bar,which is good for me,becoz i dont want any scroll bar in my widget.

But,when i compile it for arm board and run it on the board,is shows the 90* rotated widget in TFT touch screen. But,it also produces the scroll bar,which i dont want(scroll bar at left and bottom).

AIM:rotating original widget at 90*. original widnow just tilted to 90*.nothing more or less should be seen.

i am gtting scroll bar extra when i rotate it.

thanks.

[wysota]

I am rotating main widget to 90*,and its compulsory.i cant disable it.

Doooh.... Disable displaying the scrollbars.

[savaliya_ambani]

Dear Wysota,

lets start from the new one.wash out earlier.

I have my widget1 to which i want to rotate by 90*. its a simple plane widget,ok?.My code for rotating it is as below.

/****************start**********************/
QWidget *widget=new QWidget();

QWidget *widget1=new QWidget();
widget1->setGeoMetry(0,0,480,800);

//now i embed by widget into the view which i will rotate.

QGraphicsScene *scene=new QGraphicsScene(widget1);
QGraphicsProxyWidet *proxy=scene.addWidget(widget1);
QGraphicsView *view=new QGraphicsView(scene);
view.setGeoMetry(0,0,800,480); //Note: W and H will gets InterChanged after rotation
view.setWidnowFlags(Qt::FramelessWindowHint);
view.rotate(90*);
view.show();

/***********End***************************/

Initially, Widget1 was a plane widget.it doesnt have any frame or scrollbar.When it gets rotated ,and shows me the rotated
widget1,it has the scroll bar at Right and Bottom side.I dont from where and why the scroll bar gets included into it.

When i disable rotation by simply comenting it,it oes not shows any scroll bar.

I think scroll bar comes because of rotation only,and i have tested this thing.


Kindly answer why this is happening.
Thanks.

[wysota]

Why don't you just tell your graphics view not to show the scrollbars like I already told you to do? By the way, if you have a view which is 800x480 in size and you try to place inside a widget which is 800x480 in size then obviously it will not fit because of the margin between the view and its viewport, regardless of the orientation.

[savaliya_ambani]

Dear All,

I have rotated Main Widget . And all the things working fine.

I have fixed three buttons on it,and i have three persons information to show with respective to button pressed.
so when any button event comes,it loads the information for that person.let say, btn1 for person1, llly for 2 and 3.

when i press a button it gets pressed,than takes little time,and comes in a original postion.I mean to say ,
it is taking a lot time.?( more than 300 msec),the response is very slow.

In the same case ,if i didnt rotate the widget ,than the buttons gets pressed suddenly at a moment,and it is giving a very nice response.All the info gets loaded suddenly.

Does any body know,why the rotating object takes a time.Widget is a parent and all the buttons on it are on it.

Thanking you all.

[wysota]

Does any body know,why the rotating object takes a time.Widget is a parent and all the buttons on it are on it.

Because it all requires math calculations that take time. If your device doesn't support rotating the screen (and the frame buffer, I suppose), you just have to live with it.

[savaliya_ambani]

Dear wysota,

Thanks for providing me a very useful information. Now,we have to work with the slower speed of the event of all
the object if we rotate the main widget which is parent.And our device is not suporting the rotation.we are using the
atmel ARM9 Board and it has in built LCD controller.How can i add support of the rotation in this?

(2)Is it possible to get the speedy response of a pushbutton,if we didint rotate the main widget,but we rotate a pushbutton it self?

(3)Now, i have decided to design the graphics in a portrait mode which will fit to the LCD,which is also a portrait mode.But we all design the graphics on a PC which is landscape.So,i have to design all the objects whose text name goes from bottom to left on a PC screen.

(4) W.r.t to (3) if i dont design text name from bottom to top,but i want to rotate only the text name,and than fits to the
push button.is this possible to rotate the text name only?


please reply me ASAP.
Thanks to all.

[wysota]

How can i add support of the rotation in this?

That's a question to the producer of the device not to us.

(2)Is it possible to get the speedy response of a pushbutton,if we didint rotate the main widget,but we rotate a pushbutton it self?

It will be better but slower than if you implemented your own rotated button like the one in our wiki.

(4) W.r.t to (3) if i dont design text name from bottom to top,but i want to rotate only the text name,and than fits to the
push button.is this possible to rotate the text name only?

I think you still don't get what you are doing with Graphics View here and how it works. I suggest you do your homework right now and learn about it, otherwise you are just wasting other people's time and your own as well.

please reply me ASAP.

Never request such a thing here again unless you want to wait a very long time for a response. If you start rushing me, I don't see a point in helping you at all, you are not my boss that could tell me to do something quicker.

[savaliya_ambani]

I am Sorry.