[SOLVED] Need a book to learn using widget properties in kdevelop

edbarx · 05-06-2012, 06:25 AM

Hi,

I need a book to learn how to use widget properties in kdevelop (c++). I studied c/c++ but I couldn't find a decent introduction as to how widget properties could be used. Previously, I programmed in Object Pascal and to access a property I would have done something like this:

Code:

objectinstance.property := 2;
a := objectinstance.property;

Thanks for any help.

edbarx · 05-06-2012, 11:10 AM

Is it possible that Nobody knows of a suitable book! I am not a student and I am not studying at an institution. How can I know that any book I buy is suitable for the purpose I want?!

Please, make your suggestions. If you studied at an institution it should be more than easy for you to suggest a book, but definitely not for anyone like me who hasn't.

dugan · 05-06-2012, 12:09 PM

I didn't understand the question, and no-one else did did either. What are these "widgets" that you're talking about? If they're user interface elements, then which GUI toolkit (GTK? QT?) are you using? If you're writing your own classes and trying to implement getters and setters, then that's something else entirely.

BTW, BUMP posts are against the rules here. Yours was particularly unreasonable. I have my time zone set correctly, so I see that your first post was posted at 4:25am (my time) and the second at 9:10am (my time). Therefore, it's very possible that no-one saw this thread in the only 5 hours between your first post and the time you bumped it.

edbarx · 05-06-2012, 02:18 PM

I beg the board's admins' pardon for inadvertently violating any rules.

In my first post, I was referring to user interface elements. These are buttons, menus, edit boxes, list boxes, etc. Those were referred to as widgets and I am completely at loss using them notwithstanding that I successfully programmed a long expresssion evaluating class in c++. I can program for the CLI using command line parameters but I would like also to extend my ability further to use graphical programs as well. I have been doing this for years using Delphi (object pascal) but appartently, the originators of c++'s widgets decided to use some unimaginable way to set/retrieve the values of widget properties.

I am posting a code snippet to give an idea as to which toolkit I would like to use:

Code:

KConfigDialog *dialog = new KConfigDialog(this, "settings", Settings::self());
    QWidget *generalSettingsDlg = new QWidget;
    ui_prefs_base.setupUi(generalSettingsDlg);
    dialog->addPage(generalSettingsDlg, i18n("General"), "package_setting");
    connect(dialog, SIGNAL(settingsChanged(QString)), m_view, SLOT(settingsChanged()));
    dialog->setAttribute( Qt::WA_DeleteOnClose );
    dialog->show();

Code:

#ifndef MYSECONDVIEW_H
#define MYSECONDVIEW_H

#include <QtGui/QWidget>

dugan · 05-06-2012, 03:02 PM

Qt then. I'm surprised that you didn't name it.

Here is the documentation for Qt's property system (focusing on how to declare new properties):
http://qt-project.org/doc/properties.html

The definitive Qt book (well, after the online documentation) is Mark Summerfield's C++ GUI Programming With Qt 4, which you can legally download for free:
http://dcsoft.wordpress.com/2010/01/...prentice-hall/

As for how to set and retrieve the values of these properties, it's simple and certainly not "unimaginable":

Code:

QLabel *label = new QLabel(this);
label->setText(tr('Blargh')); // Set the text property
QString text = label->text(); // Read the text property

edbarx · 05-06-2012, 04:29 PM

Thanks for the link. I downloaded the .chm file and converted it into a .pdf file.