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QComboBox in QToolbar ???

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boyz5

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1

Monday, December 6th 2004, 4:11pm

QComboBox in QToolbar ???

hello,
I was wondering how I can set a QComboBox in the QToolBar. I already tried this:

QComboBox *cb = new QComboBox(this);
QAction *action = new QAction("a combobox", 0, cb);
action->addTo(MyToolbar);

But the combobox is not exactly in the toolbar- it's somewhere else placed :D

samdutton

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Monday, December 6th 2004, 5:09pm

RE: QComboBox in QToolbar ???

I don't think QAction has a constructor that fits your arguments -- but it's not what you need anyway.

Take a look at the documentation for QToolBar and its parent QDockWindow:

Quoted

A dock window is often used to contain a single widget. In these cases the widget can be set by calling setWidget(). If you're constructing a dock window that contains multiple widgets, e.g. a toolbar, arrange the widgets within a box layout inside the dock window. To do this use the boxLayout() function to get a pointer to the dock window's box layout, then add widgets to the layout using the box layout's QBoxLayout::addWidget() function. The dock window will dynamically set the orientation of the layout to be vertical or horizontal as necessary, although you can control this yourself with setOrientation().


I don't think you can just create the combo as a child of the toolbar.

Sam

This post has been edited 1 times, last edit by "samdutton" (Dec 6th 2004, 5:12pm)

boyz5

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Monday, December 6th 2004, 5:17pm

well, but what am i supposed to do?

samdutton

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Monday, December 6th 2004, 5:23pm

Quoted

well, but what am i supposed to do?


Follow the instructions in the quote in my previous reply:

Quoted

use the boxLayout() function to get a pointer to the dock window's box layout, then add widgets to the layout using the box layout's QBoxLayout::addWidget() function.


(QDockWindow is the parent of QToolBar, so you can do all this to your toolbar.)

Good luck!

Sam

wysota

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Monday, December 6th 2004, 5:25pm

RE: QComboBox in QToolbar ???

Source code

 
1

QComboBox *cb = new QComboBox(MyToolbar);


will be sufficient. You can then access cb as a normal combo box, connect signals to its slots and slots to its signals.
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boyz5

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6

Monday, December 6th 2004, 5:39pm

wysota you were right! it worked. but it is at the beginning of my toolbar, how can I put it at the end or on my specific place i want it to be?

boyz5

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7

Monday, December 6th 2004, 5:56pm

uhh and by the way - how to make bold or italic texts in the combobox?
i tried:
combobox->insertItem("<b>Bold</b>", 15);

but its not working...

axeljaeger

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Monday, December 6th 2004, 6:09pm

It's nice to be important but it's more important to be nice

samdutton

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Monday, December 6th 2004, 6:18pm

Quoted

how to make bold or italic texts in the combobox?


I haven't ever done this, but I think you'll need to create a QListBox subclass (using a QListBoxItem subclass that supports rich text) then use QComboBox::setListBox(...) to set the list box for the combo to your subclass. Phew...

There may well be a simpler way.

Sam

boyz5

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Monday, December 6th 2004, 7:09pm

okay... i fixed the first problem but not i still cannot make some items in ComboBox bold or italic or so.
@samdutton - i guess there's an easier way to fix this :D

boyz5

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11

Tuesday, December 7th 2004, 3:54pm

please! i need to know how i can realize that! i'd appreciate every help i could get!

samdutton

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Tuesday, December 7th 2004, 4:03pm

Did you try what I suggested?

Quoted

create a QListBox subclass (using a QListBoxItem subclass that supports rich text) then use QComboBox::setListBox(...) to set the list box for the combo to your subclass.

It looks a bit complex, but shouldn't be that difficult.

Sam

wysota

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Tuesday, December 7th 2004, 4:06pm

QComboBox doesn't offer rich text by itself. You have to use some workaround or subclass QComboBox and change its method responsible for drawing the text (you can use QSimpleRichText to ease your life).
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boyz5

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Tuesday, December 7th 2004, 4:29pm

i guess the advice of samdutton is the better one ;)

void MyListBoxItem::paint(QPainter *p)
{
QListBoxItem::paint(p);
//....
}

The compiler gives me this error:

test.obj : error LNK2019: unresolved external symbol "protected: virtual void __thiscall QListBoxItem::paint(class QPainter *)" (?paint@QListBoxItem@@MAEXPAVQPainter@@@Z) referenced in function "private: virtual void __thiscall MyListBoxItem::paint(class QPainter *)" (?paint@MyListBoxItem@@EAEXPAVQPainter@@@Z)
.\test.exe : fatal error LNK1120: 1 unresolved externals

samdutton

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Tuesday, December 7th 2004, 4:50pm

Did you have #include <qlistbox.h> in your header? You might also need a forward declaration: class QListBoxItem;

Sam

boyz5

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Tuesday, December 7th 2004, 5:06pm

test.h
-----------
#include<qlistbox.h>

class MyListBoxItem : public QListBoxItem
{
void paint(QPainter *);
};

test.cpp
------------
#include "test.h"

void MyListBoxItem::paint(QPainter *p)
{
QListBoxItem::paint(p);
}

that's it (kinda)!

samdutton

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Tuesday, December 7th 2004, 5:08pm

Looks like you forgot

Source code

 
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8
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Q_OBJECT

public: 

...

private:

...

at the top of the class declaration.

Sam

This post has been edited 1 times, last edit by "samdutton" (Dec 7th 2004, 5:09pm)

boyz5

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18

Tuesday, December 7th 2004, 5:13pm

well... if i do that:

class MyListBoxItem : public QListBoxItem
{
Q_OBJECT
public:
MyListBoxItem(QListBox *listbox=0);
private:
void paint(QPainter *);
};

then i got even more errors:

tmp\moc\release_mt_static\moc_test.cpp(336) : error C2039: 'staticMetaObject' : is not a member of 'QListBoxItem'
C:\Qt\include\qlistbox.h(316) : see declaration of 'QListBoxItem'
tmp\moc\release_mt_static\moc_test.cpp(354) : error C2039: 'qt_cast' : is not a member of 'QListBoxItem'
C:\Qt\include\qlistbox.h(316) : see declaration of 'QListBoxItem'
tmp\moc\release_mt_static\moc_test.cpp(359) : error C2039: 'qt_invoke' : is not a member of 'QListBoxItem'
C:\Qt\include\qlistbox.h(316) : see declaration of 'QListBoxItem'
tmp\moc\release_mt_static\moc_test.cpp(364) : error C2039: 'qt_emit' : is not a member of 'QListBoxItem'
C:\Qt\include\qlistbox.h(316) : see declaration of 'QListBoxItem'
tmp\moc\release_mt_static\moc_test.cpp(370) : error C2039: 'qt_property' : is not a member of 'QListBoxItem'
C:\Qt\include\qlistbox.h(316) : see declaration of 'QListBoxItem'

samdutton

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Tuesday, December 7th 2004, 5:15pm

Oops -- leave out the Q_OBJECT.

QListBoxItem doesn't inherit QObject.

Sam

wysota

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Tuesday, December 7th 2004, 8:18pm

You can't use QListBoxItem::paint(...) as it is a pure abstract method (it doesn't exist there, look that a null is assigned to it).
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