QT

after a specific action is done(ex: button pressed() or released)

Slot

– what must be done after signal is received(ex: close() an application or change the color of label)

a macro. Must be used when signal and slot are

used
connect() – function is needed to create a macro
button – object for signal
SIGNAL(clicked()) – what action must be done when function of object for signal is done
&application – object for slot
SLOT(close()) – what action must be done with object for slot

each widget in pixels. When you use absolute positioning, you

have to understand several things:

the size and the position of a widget do not change, if you resize a window
applications look different (often crappy) on various platforms
- changing fonts in your application might spoil the layout
- if you decide to change your layout, you must completely redo your layout, which is tedious and time consuming

of y-axis
w – width of object
h – height of object

Ex:

button->setGeometry(100,0,50,50)

in vertical way
QGridLayout – places objects like a grid

Ex: grid->addWidget(button, i, j);