CODEWITHSUNDEEP
c++qt
Claudiu
Claudiu

Reputation: 165

QWidget Overflow

I have a main QGridLayout on the dialog I'm working on. It's split into content-containers (QWidgets with their own QVBoxLayout) of varying sizes, each assigned a particular number of grid-columns within the grid layout (depending on their needs).

Each content-container holds some buttons. Some of these buttons should span across 2 content-containers. The way I'm trying to achieve this is by overflowing these 2-container buttons outside their layout, while keeping the size of the content-containers the same (what it was allocated according to the number of columns within the grid). I have no idea how to go about this, because either the size of the containers changes, or the QWidget doesn't overflow.

Is there a way to set some sort of overflow property on the button, or do I have to just place the buttons on the grid? I'm trying to avoid doing this because I think it could be messy once new requirements arise and I'll have to recalculate their positioning.

Here is an image of what I'm trying to do:

enter image description here

Here is the relevant code:

ModeDialog::ModeDialog(MainWindow *pMainWindow)
  : XDialog(pMainWindow, tr("Operating Mode"), true)
{
    XDialog::AddButton(tr("Exit"), QDialogButtonBox::AcceptRole);

ConstructStylingFromTemplates();

CSettings* Settings = pMainWindow->GetSettings();

QString SlotString1, SlotString2;
QGridLayout* mp_MainLayout = new QGridLayout();
mp_MainLayout->setContentsMargins(10, 30, 10, 20);

// Construct Channel Group Layouts with Channel Containers
for (int i = 0; i < 3; i++)
{
  switch(i)
  {
    case 0: { SlotString1 = "A"; SlotString2 = "B"; break; }
    case 1: { SlotString1 = "C"; SlotString2 = "D"; break; }
    case 2: { SlotString1 = "E"; SlotString2 = "F"; break; }
  }

  QHBoxLayout* ChannelGroupLayout = new QHBoxLayout();
  if (CSettings_RR::IsE1T1Channel(Settings, i*2))
  {
    AddChannelToChannelGroup(ChannelGroupLayout, SlotString1);
    AddChannelToChannelGroup(ChannelGroupLayout, SlotString2);
  }
  else if(CSettings_RR::IsPtpChannel(Settings, i*2))
  {
    AddChannelToChannelGroup(ChannelGroupLayout, SlotString1);
  }
  else if(CSettings_RR::IsOtaChannel(Settings, i*2))
  {
    AddChannelToChannelGroup(ChannelGroupLayout, SlotString1);
  }
  else
  {
    continue;
  }

  mp_MainLayout->addLayout(ChannelGroupLayout, 0, i*2, 1, 2);
}

SetContentLayout(mp_MainLayout);}

void ModeDialog::AddChannelToChannelGroup(QHBoxLayout* ChannelGroupLayout, QString SlotString)
{
  QVBoxLayout* ChannelLayout = new QVBoxLayout();

  // Add Label to Channel Layout
  XLabel* ChannelLabel = new XLabel("Channel " + SlotString, m_textSize, true, Qt::AlignCenter | Qt::AlignVCenter, this);
  ChannelLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
  ChannelLayout->addWidget(ChannelLabel);

  // Add Container to Channel Layout
  QWidget* ChannelContainer = new QWidget();
  ChannelContainer->setStyleSheet(m_styleSheetChannelContainer);
  ChannelLayout->addWidget(ChannelContainer);

  //WIP - add buttons to container
  QVBoxLayout* ChannelContainerLayout = new QVBoxLayout();
  ChannelContainer->setLayout(ChannelContainerLayout);

  XPushButton* ModeButton = new XPushButton(tr("CLOCK"), 160, 40, this, true);
  ChannelContainerLayout->addWidget(ModeButton);
  //WIPEND

  // Add Channel Layout to Channel Group Layout
  ChannelGroupLayout->addLayout(ChannelLayout);
}

Upvotes: 1

Views: 730

Answers (2)

ymoreau
ymoreau

Reputation: 3996

It is not possible to overflow using QWidgets.

But it is possible with QML.
By default, items will overflow and you have to manage their positions and sizes (and z-index to tell who overlaps who) : http://doc.qt.io/qt-5/qtquick-positioning-topic.html

You have to use QML layouts or set the item's parent property clip to true to avoid the overflow.

Upvotes: 3

SteakOverflow
SteakOverflow

Reputation: 2033

There is no way to overflow widgets in Qt, not even if you don't use a layout. A widget will always be limited to its parent's bounds.

Upvotes: 3

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