There are currently five different kinds of sizers available in wxWidgets. Each represents either a certain way to lay out dialog items in a dialog or it fulfills a special task such as wrapping a static box around a dialog item (or another sizer). These sizers will be discussed one by one in the text below. For more detailed information on how to use sizers programmatically, please refer to the section Programming with wxBoxSizer. All sizers are containers, that is, they are used to lay out one dialog item (or several dialog items), which they contain. Such items are sometimes referred to as the children of the sizer. Independent of how the individual sizers lay out their children, all children have certain features in common:

What makes sizers so well fitted for use in wxWidgets is the fact that every control reports its own minimal size and the algorithm can handle differences in font sizes or different window (dialog item) sizes on different platforms without problems. For example, if the standard font as well as the overall design of Linux/GTK widgets requires more space than on Windows, the initial dialog size will automatically be bigger on Linux/GTK than on Windows. For information about the wxWidgets resource system, which can describe sizer-based dialogs, see the XML Based Resource System (XRC). See also wxSizer, wxBoxSizer, wxStaticBoxSizer, wxGridSizer, wxFlexGridSizer, wxGridBagSizer wxFlexGridSizer is a sizer which lays out its children in a two-dimensional table with all table fields in one row having the same height and all fields in one column having the same width, but all rows or all columns are not necessarily the same height or width as in the wxGridSizer.You can hide controls contained in sizers the same way you would hide any control, using the wxWindow::Show method. However, wxSizer also offers a separate method which can tell the sizer not to consider that control in its size calculations. To hide a window using the sizer, call wxSizer::Show. You must then call Layout on the sizer to force an update. At the first look it appears as if the method of operation of a Center Sizer would be identical to a Double Roll Crusher. It is in fact very close, however, not identical. Still today, customers are not using always the correct terms because of this irritation. By the end of the day, we, as experts, would have to make the decision on which crusher would be the best choice. The operating principle is based on a continuous generation of pressure between two counter – rotating rolls, so that crushing takes place without interruptions in contrast to the intermittent Jaw Crushers. Due to the small number of high teeth big lumps can immerse deep between the rolls and are crushed immediately. The force acting on material is punctual and even not plane as it is typical for Jaw Crushers. The result is a minimization of fine generation. In contrast to a Double Roll Crusher, the basic concept of the Mineral Sizer is the use of two rolls with smaller diameter shafts, because of the operation at a lower rotational speed by a direct high torque drive system. This design produces three major principles which all interact when breaking materials using sizer technology. The unique principles are the three-stage breaking action, the rotating screen effect, and the deep scroll tooth pattern.

The next section describes and shows what can be done with sizers. The following sections briefly describe how to program with individual sizer classes. Jan 2020 — Implement DPI awareness so icons and text are crisp on high DPI displays; add option to duplicate a menu item; fix saving of 'Allow move outside screen bounds' setting. MSI installer sizer4_dev622.msi (324KB) or binaries only sizer4_dev622.zip (128KB). May 2018 — Implement "Current as new entry" menu action. Macro additions: option to control frame effect compensation; keyword to position relative to workarea; keyword to qualify windows by active desktop. MSI installer sizer4_dev570.msi (292KB) or binaries only sizer4_dev570.zip (100KB). It is the unique feature of a box sizer, that it can grow in both directions (height and width) but can distribute its growth in the main direction (horizontal for a row) unevenly among its children. In our example case, the vertical sizer is supposed to propagate all its height changes to only the text area, not to the button area. This is determined by the proportion parameter when adding a window (or another sizer) to a sizer. It is interpreted as a weight factor, i.e. it can be zero, indicating that the window may not be resized at all, or above zero. If several windows have a value above zero, the value is interpreted relative to the sum of all weight factors of the sizer, so when adding two windows with a value of 1, they will both get resized equally much and each half as much as the sizer owning them. Then what do we do when a column sizer changes its width? This behaviour is controlled by flags (the second parameter of the Add() function): Zero or no flag indicates that the window will preserve it is original size, wxGROW flag (same as wxEXPAND) forces the window to grow with the sizer, and wxSHAPED flag tells the window to change it is size proportionally, preserving original aspect ratio. When wxGROW flag is not used, the item can be aligned within available space. wxALIGN_LEFT, wxALIGN_TOP, wxALIGN_RIGHT, wxALIGN_BOTTOM, wxALIGN_CENTER_HORIZONTAL and wxALIGN_CENTER_VERTICAL do what they say. wxALIGN_CENTRE (same as wxALIGN_CENTER) is defined as (wxALIGN_CENTER_HORIZONTAL | wxALIGN_CENTER_VERTICAL). Default alignment is wxALIGN_LEFT | wxALIGN_TOP.Jan 2017 — Fix so workarea/monitor coordinate option is saved to configuration file. MSI installer sizer4_dev556.msi (292KB) or binaries only sizer4_dev556.zip (97KB).