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Forum: Qt Programming

General more advanced Qt programming issues.

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  1. Qwt

    Questions related to Qwt - Qt widgets for technical applications.

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    • Posts: 10,901

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  1. Question QGraphicsProxyWidget usage leads to QApplication destructor crashing

    Started by redsoft, 25th June 2022 18:00
    qapplication, qgraphicsproxywidget
    • Replies: 1
    • Views: 3,007
    d_stranz
    1st July 2022, 16:24 Go to last post

  2. Using two separate databases over ODBC inside a class fails

    Started by Tiansen, 8th June 2022 20:08
    • Replies: 2
    • Views: 2,977
    Tiansen
    9th June 2022, 22:16 Go to last post

  3. QFontMetrics::boundingRect() and QPainter::draw() differences.

    Started by Lykurg, 27th February 2013 10:02
    • Replies: 3
    • Views: 10,322
    Blanky
    9th June 2022, 16:29 Go to last post

  4. Viewing QSqlTableModel in QTreeView through a proxy model

    Started by kazaak, 7th January 2018 21:04
    qsqltablemodel, qtreeview
    • Replies: 3
    • Views: 16,373
    d_stranz
    28th May 2022, 16:37 Go to last post

  5. How to create an SQL Function in QSqlDatabase?

    Started by VVS, 30th March 2022 18:02
    qt sqlite
    • Replies: 1
    • Views: 6,758
    stryga42
    27th May 2022, 18:11 Go to last post

  6. Qt::WA_TransparentForMouseEvents

    Started by zaphod.b, 23rd May 2022 14:06
    • Replies: 3
    • Views: 7,958
    zaphod.b
    24th May 2022, 10:30 Go to last post

  7. QOpenGLWidget and swapBuffers outside paintGL

    Started by aftos, 24th May 2022 08:53
    • Replies: 0
    • Views: 14,180
    aftos
    24th May 2022, 08:53 Go to last post

  8. Create an object instance in separate thread

    Started by franco.amato, 4th May 2022 18:56
    • Replies: 4
    • Views: 5,203
    d_stranz
    6th May 2022, 17:54 Go to last post

  9. Qt 5.15 Multitouch issue

    Started by webquinty, 12th April 2022 13:01
    • Replies: 3
    • Views: 4,856
    d_stranz
    14th April 2022, 16:15 Go to last post

  10. How to set a "dark color theme" for all widgets within the application ?

    Started by ralfwickum, 23rd July 2015 08:26
    color, dark, theme
    • Replies: 2
    • Views: 29,967
    osirisgothra
    13th April 2022, 18:26 Go to last post

  11. Error while installing OpenCV with Qt

    Started by mlte, 21st March 2022 02:50
    opencv qt 1 Attachment(s)
    • Replies: 1
    • Views: 2,927
    d_stranz
    21st March 2022, 15:06 Go to last post

  12. QSqlTableModel, how to recognize new records from dirty records

    Started by franco.amato, 18th March 2022 20:12
    • Replies: 4
    • Views: 3,081
    d_stranz
    20th March 2022, 15:52 Go to last post

  13. Remove item from QTableView by drag

    Started by franco.amato, 14th March 2022 21:03
    • Replies: 3
    • Views: 2,944
    d_stranz
    15th March 2022, 15:18 Go to last post

  14. action with shortcut triggers in parent

    Started by tuli, 4th March 2022 19:46
    • Replies: 1
    • Views: 2,479
    franco.amato
    14th March 2022, 20:58 Go to last post

  15. How to exclude a specific file extension from QDir::entryList

    Started by franco.amato, 7th March 2022 19:00
    • Replies: 2
    • Views: 4,228
    d_stranz
    9th March 2022, 16:31 Go to last post

  16. How to communicate with USB device (EV3)

    Started by bclay1297@gmail.com, 14th February 2022 17:37
    usb ev3
    • Replies: 1
    • Views: 2,959
    wysota
    24th February 2022, 09:36 Go to last post

  17. Moved: Slow loading of Qt app on Android

    Started by ahsan735, 24th February 2022 15:33
    qt android 5.5 c++, qt android deployment
    •  
    •  

  18. Question QTableVIew shows number with commas but model->data(index).toString shows dots

    Started by polrus, 8th February 2022 14:03
    • Replies: 3
    • Views: 2,630
    d_stranz
    18th February 2022, 19:48 Go to last post

  19. Angry QSortFilterProxyModel very slow when moving a lot of rows

    Started by gabo, 16th February 2022 13:30
    item model, move rows, persistent index, qsortfilterproxymodel, sort
    • Replies: 1
    • Views: 3,249
    d_stranz
    16th February 2022, 16:37 Go to last post

  20. How to reverse the order of the same keys when inserted using QMultiMap

    Started by franco.amato, 15th February 2022 00:14
    • Replies: 1
    • Views: 2,594
    Ginsengelf
    15th February 2022, 07:17 Go to last post

  21. Read a file containing key-value pair

    Started by franco.amato, 14th February 2022 20:33
    • Replies: 1
    • Views: 2,259
    Ginsengelf
    15th February 2022, 07:15 Go to last post

  22. Drawing lines in QPainter takes a lot of time

    Started by xcxl, 4th June 2019 12:47
    2 Pages •
    1 2
    draw, line, lines, qpainter 1 Attachment(s)
    • Replies: 21
    • Views: 24,494
    xcxl
    13th February 2022, 17:59 Go to last post

  23. Question qmake sessions and placing subdir outputs into global binary dir (OUT_DIR)

    Started by ghorwin, 8th February 2022 12:19
    • Replies: 1
    • Views: 2,346
    d_stranz
    8th February 2022, 16:44 Go to last post

  24. Question Resource search/lookup tool/script to check completeness and correctness of qrc files

    Started by ghorwin, 25th January 2022 07:41
    qrc unused pixmap
    • Replies: 5
    • Views: 3,223
    d_stranz
    8th February 2022, 16:25 Go to last post

  25. Trying to convert python code to Qt c++

    Started by panoss, 5th February 2022 16:31
    • Replies: 2
    • Views: 2,049
    Ginsengelf
    7th February 2022, 07:19 Go to last post

  26. KDE Plasma HiDPI icons

    Started by Vicolaships, 5th February 2022 12:59
    hidpi, kde, plasma 2 Attachment(s)
    • Replies: 1
    • Views: 2,292
    Ginsengelf
    7th February 2022, 07:14 Go to last post

  27. How to use QRegExp to check if a QString contains 3 letters consecutively?

    Started by sophvic, 6th February 2022 20:48
    • Replies: 0
    • Views: 10,561
    sophvic
    6th February 2022, 20:48 Go to last post

  28. needs to instantiate a dialogue in a switch construct

    Started by franco.amato, 31st January 2022 04:19
    • Replies: 2
    • Views: 2,171
    d_stranz
    31st January 2022, 15:44 Go to last post

  29. Serialize and read a QVector<QMultiMap<QString, QString>> to a QDataStream

    Started by franco.amato, 24th January 2022 22:19
    • Replies: 2
    • Views: 2,675
    franco.amato
    25th January 2022, 21:08 Go to last post

  30. QTreeWidget takeChildren() without removing

    Started by franco.amato, 20th January 2022 15:59
    qtreewidget
    • Replies: 3
    • Views: 3,025
    franco.amato
    21st January 2022, 01:34 Go to last post
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