In a simple form I made a few buttons and put a horizontal layout. When mouse leaves the area one of the buttons, the last one, should be hidden. Using button->hide() it works, but all the buttons are rearranged by the layout manager. What I want is that all other buttons remain in their positions. I tried replacing the widget with a widget placeholder and swapping the button and placeholder hide()/show(), calling placeholder->resize(button->size()), but the layout manager doesn't respect the resize, and the placeholder is set with its minimum size. What is the best way to remove a widget and keep its space?
Qt – Hiding Qt widget and keeping widget space
layoutqtwidget
Related Solutions
Create QVBoxLayout, then add two QHBoxLayouts to it. In top QHBoxLayout add labels, in bottom one add stretch, button, stretch.
#include <QString>
#include <QApplication>
#include <QWidget>
#include <QPushButton>
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QLocale>
int main(int argc, char** argv){
QApplication app(argc, argv);
QWidget widget;
QVBoxLayout* vLayout = new QVBoxLayout(&widget);
QHBoxLayout* topLayout = new QHBoxLayout();
QHBoxLayout* bottomLayout = new QHBoxLayout();
QLabel* label1 = new QLabel(QObject::tr("Label1"));
QLabel* label2 = new QLabel(QObject::tr("Label2"));
label1->setAlignment(Qt::AlignCenter);
label2->setAlignment(Qt::AlignCenter);
QPushButton* btn1 = new QPushButton(QObject::tr("The Button!!!!"));
topLayout->addWidget(label1);
topLayout->addWidget(label2);
bottomLayout->addStretch();
bottomLayout->addWidget(btn1);
bottomLayout->addStretch();
vLayout->addLayout(topLayout);
vLayout->addLayout(bottomLayout);
widget.show();
return app.exec();
}
You can get the size of the window or document with jQuery:
// Size of browser viewport.
$(window).height();
$(window).width();
// Size of HTML document (same as pageHeight/pageWidth in screenshot).
$(document).height();
$(document).width();
For screen size you can use the screen object:
window.screen.height;
window.screen.width;
Best Answer
In Qt 5.2 it is possible to do the following:
I earlier posted the same solution here:
How to make a Qt widget invisible without changing the position of the other Qt widgets?
(which seems to be a duplicate of this question).