我尝试使用resize(sizeHint());这给了我一个不正确的大小和以下错误,但在调整大小/拖动时仍然会发生正确大小的捕捉.
QWindowsWindow::setGeometry: Unable to set geometry 299x329+991+536 on QWidgetWindow/'TileSetterWindow'. Resulting geometry: 299x399+991+536 (frame: 8,31,8,custom margin: 0,minimum size: 259x329,maximum size: 16777215x16777215).
我也尝试过使用updateGeometry()和update(),但它似乎没有做太多的事情.
将窗口设置为fixedSize时,它会立即调整大小,但用户无法再调整窗口大小.我在这里做错了什么,我从哪里开始解决它？
编辑
Minimal verifiable example和.ui file.
selected_layout的类型为Flowlayout
flowlayout_placeholder_1仅在那里,因为我无法将flowlayout直接放入设计器中.
EDIT2
这是minimal Visual Studio example.我使用Visual Studio进行Qt开发.我尝试在Qt Creator中创建一个项目,但我没有让它工作.
EDIT3
添加了little video(80 KB).
Edit4
这是updated Visual Studio example.它有jpo38提出的新变化.它解决了调整错误的问题.虽然现在试图缩小窗口的尺寸会导致问题.如果您尝试减少水平空间,即使有更多行的空间,它们也不会正确填充垂直空间.
解决方法
看起来这个FlowLayout类的设计不是为了让用户操作的最小尺寸更改.移动窗口时,QWidget内核会“偶然”更新布局.
我可以通过修改FlowLayout :: minimumSize()行为使其工作变得聪明,以下是我所做的更改：
>添加了QSize minSize;属性为FlowLayout类
>修改FlowLayout :: minimumSize()以简单地返回此属性
>为doLayout函数添加了第三个参数QSize * pMinSize.这将用于更新此minSize属性
>修改了doLayout以将计算大小保存到pMinSize参数(如果已指定)
>如果最小尺寸发生变化,则FlowLayout :: setGeometry将minSize属性传递给doLayout并使布局无效
然后布局按预期运行.
int FlowLayout::heightForWidth(int width) const {
const int height = doLayout(QRect(0,width,0),true,NULL); // jpo38: set added parameter to NULL here
return height;
}
void FlowLayout::setGeometry(const QRect &rect) {
QLayout::setGeometry(rect);
// jpo38: update minSize from here,force layout to consider it if it changed
QSize oldSize = minSize;
doLayout(rect,false,&minSize);
if ( oldSize != minSize )
{
// force layout to consider new minimum size!
invalidate();
}
}
QSize FlowLayout::minimumSize() const {
// jpo38: Simply return computed min size
return minSize;
}
int FlowLayout::doLayout(const QRect &rect,bool testOnly,QSize* pMinSize) const {
int left,top,right,bottom;
getContentsMargins(&left,&top,&right,&bottom);
QRect effectiveRect = rect.adjusted(+left,+top,-right,-bottom);
int x = effectiveRect.x();
int y = effectiveRect.y();
int lineHeight = 0;
// jpo38: store max X
int maxX = 0;
for (auto&& item : itemList) {
QWidget *wid = item->widget();
int spaceX = horizontalSpacing();
if (spaceX == -1)
spaceX = wid->style()->layoutSpacing(QSizePolicy::PushButton,QSizePolicy::PushButton,Qt::Horizontal);
int spaceY = verticalSpacing();
if (spaceY == -1)
spaceY = wid->style()->layoutSpacing(QSizePolicy::PushButton,Qt::Vertical);
int nextX = x + item->sizeHint().width() + spaceX;
if (nextX - spaceX > effectiveRect.right() && lineHeight > 0) {
x = effectiveRect.x();
y = y + lineHeight + spaceY;
nextX = x + item->sizeHint().width() + spaceX;
lineHeight = 0;
}
if (!testOnly)
item->setGeometry(QRect(QPoint(x,y),item->sizeHint()));
// jpo38: update max X based on current position
maxX = qMax( maxX,x + item->sizeHint().width() - rect.x() + left );
x = nextX;
lineHeight = qMax(lineHeight,item->sizeHint().height());
}
// jpo38: save height/width as max height/xidth in pMinSize is specified
int height = y + lineHeight - rect.y() + bottom;
if ( pMinSize )
{
pMinSize->setHeight( height );
pMinSize->setWidth( maxX );
}
return height;
}
