I know horizontal scaling refers to adding more instances, vertical scaling refers to improving capability of single instance.
My question is why naming this way? why not the other way around ? Is there some common in horizontal and more instances ? or is it just naming convention
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I want to create a flexible layout, where the User can resize Widgets, but still give a good default layout. I'm using the Qt Designer for everything.
As a minimal example I used a simple Windows with a Widget and a plainTextEdit. The later one seems to cause the problems, which is why I choose it. At first I built it without the Splitter which worked just fine. The Stretching factors are 1:1 by the way.
Now I put both widgets in a Splitter (by breaking the main layout, putting both widgets in a Splitter and setting a new layout to the main widget). Resizing still works but the stretching factors behave weird:
The PlainTextEdit seems to take up far to much space. The Stretching Factors are still at 1:1. I found a workaournd, by changing the stretching of the upper widget to a much higher value (in this case 9:1), which looks good again:
So my question is: Why do the stretching factors begin to behave weird when I put the images in a Splitter? And how can I solve this without using arbitrary guessed stretching factors?
QSplitter::setSizes() can be used to set relative sizes. According to the documentation, "any additional/missing space is distributed amongst the widgets according to the relative weight of the sizes".
In this case, it is a bit ugly, since you have to add this in your code rather than editing your layout in QDesigner (normally, you would want to define your layout only at one place), but still it is quick and works:
MyWindow::MyWindow(QWidget* parent):
QWidget(parent)
{
m_Ui.setupUi(this);
m_Ui.splitter->setSizes({2000, 1000, 1000});
However, I had to use big numbers (instead of {2, 1, 1}), maybe because at this point, the window is not completely set up yet (apparently, Qt is not a big fan of RAII...). Also, this kind of notation works probably only with a recent C++ version, otherwise you can also define the QList in some extra lines.
I would like to know if it is possible to have line-breaking text that sometimes consists of one line and sometimes of two. I can best describe what i mean it with an image:
You would have to insert the text into separate elements which have the shape and size you want to achieve the effect you are going for. It is not possible with just one html tag.
As Watson said, you'll have to contain the elements in containers of a specific shape and size. You can't make them truly "fluid" as I think you're meaning to comment, however, you can use percentages for those containers to determine how much text is visible in space and possibly viewport sized text to try and properly fill those spaces. Definitely no manner in my mind that will allow you to easily create this in a universal method for all browsers. You're going to have a lot of ragged edges I'd suspect.
Are there any existing plugins/extensions/methods to maintain vertical rhythm for Twitter's Bootstrap project?
It is quite a laborious task to create good vertical rhythm templates, I would rather use a pre-baked solution. I am open to creative suggestions, I just want my pages nicely aligned in the end.
Edit: To clarify what I am after...
Vertical rhythm is a technique used to ensure that every element on a page lines up according to a horizontal grid. This is achieved by setting the height, padding and margin of every item to conform to a standard unit line size. If a line of text in a paragraph is 20px high (including margin and padding) then maybe a heading 4 will also be 20px high, and a heading 1 might be 40px high. This maintains the rhythm of the text across columns.
I want to use this technique in combination with bootstrap (from twitter), but it would be quite a lot of work to get everything looking nice. For example, all the buttons would need to conform to the same vertical height definition as paragraph text etc... There are other standard controls used in bootstrap which would also all need rules to define their height appropriately.
I could start with a generic solution for vertical rhythm, which would go a long way to achieving what I want, but I wanted to know if anyone else has started this, or has any idea of another way to achieve this.
Edit: Assuming there is nothing like what I want...
Maybe just a good vertical-rhythm based css template would be a good starting point. Preferably something that is continuing to be developed, is already usable, well thought out, and adaptable.
Since no one has linked to an actual vertical rhythm boilerplate as you suggested, I took the one I use, commented it, and created a github repo for it here https://github.com/jonschlinkert/vertical-rhythm
As it says in the readme, this is a starting point for your own project.
I think what you're going after is understood. Problem is: you're looking for a grid schema in one dimension (a "vertical rhythm" set in accordance with, for example, proportional line heights...which, in a manner of speaking, measures and aligns things along a given page's Y axis)...but doing things in that manner might potentially be at odds with Bootstrap's pre-existing 12-column grid system (which, in contrast, measures and aligns things along the page's X axis). You want to "proportionalize" the height of each "row" in the framework. BUT: keep in mind, Bootstrap's design is intended to promote not just proportionality via columns solely for the sake of looking nice, but to also make pages responsive--i.e., to allow page elements to "flow" around one another vertically, and to nest fluidly. And, in that sense, issues pertaining to the height of elements measured along the Y axis may already be accounted for... I recall that most of the typographic elements in the base CSS file have proportional em sizes, and/or likewise proportional top and bottom padding, etc. Generally speaking, things are not so arbitrary that the framework screams a need for additional styling in the manner you're considering.
Even so: Bootstrap's base CSS file isn't so intolerably extensive that it'd be impossible for you to tweak the height of various element classes and IDs yourself without too much trouble. In any case, it's highly unlikely you're really going to need to do that with every styled element, right? In fact, as a framework, Bootstrap includes styling for many elements which may not even be in the app for which you're designing the front end. (EXAMPLE: Does your app have drop down menus? Great. You can style the "vertical rhythm" of drop down menus. BUT: are you also using pills or tabs in your nav bar? No pills, you say? Well, you can just delete a couple hundred lines of code in the stylesheet and save yourself the effort of having to apply your "vertical rhythm" to those unneeded elements.) Elsewise, for the elements that remain and that you do in fact need, just use a text editor to find-replace the values for line height, top and bottom padding, margins, font-size, etc...and test it out. As a CSS framework, it's pretty clear how Bootstrap is laid out; relevant elements are well sorted, and grouped together within the stylesheet's code for the most part. Once you do complete tweaking of the base CSS file, just minify your revised stylesheet...to replace the pre-existing minified version...or, perhaps, just serve it up from CloudFront if you want to optimize.
The Compass CSS Authoring Framework has explicit support for vertical rhythm based typography. For starters you can check out this short video tutorial.
Have you looked at the Square Grid CSS framework?
http://thesquaregrid.com/
A simple CSS framework for designers and developers, based on 35
equal-width columns. It aims to cut down on development time and help
you create beautiful-structured websites.
Square Grid provides a standard horizontal grid, but it also maintains a vertical grid, using a standard "square" of 28px. It is really just a grid, not a full CSS library like Bootstrap (i.e. no buttons, menus, etc).
I used to for one project and found it to be pretty intuitive, though I ultimately decided that it was too hard for me to keep track of both the vertical and horizontal grid, especially when thinking about responsive design.
You may be able to combine the two, or at least take a look at the square grid source code which is pretty simple CSS to get some ideas on how to adapt Bootstrap to meet your needs.
I'm trying to add a custom background to my horizontally laid out container. There are two ways mentioned to accomplish this:
Use a SkinnableContainer with a HorizontalLayout
Use a Group with a Rect and another HGroup inside it.
Which is a better option according to memory? Also, is placing multiple groups, hgroups and vgroups in a nested fashion a major flaw in design?
Thanks in advance!
Which is a better option according to memory?
You'll have to test and see, but from a theoretical approach; a SkinnableContainer will perform a lot more processing than a group. My first approach would be to use a group with a Rect inside it. Or, if you're doing mobile development, use a group and draw a Rect on top of it using the graphics API.
Also, is placing multiple groups, hgroups and vgroups in a nested
fashion a major flaw in design?
Not a major design flaw, but it could very well contribute to the lack of performance in an application. It it becomes an issue, you should evaluate your use of containers and see if you can minimize. Sometimes using a basicLayout and writing a layout algorithm will give you a lot more performance, and flexibility. It may very well take longer to write, depending on the complexity, though.
On a form designed with Qt Designer, I have two QGroupBoxes with a bunch of controls in each of them. Both group boxes have nearly the same contents (QLineEdits with associated labels).
What I want to do, however, is to align the controls together, as if they were part of the same grid layout. But since they are in separate containers, they can't share the same layout, and I don't want to give them a fixed width.
Is there a way to do it in Qt Designer? If not, is there a way to do it in code?
Thanks!
There is no way to do this in Designer. As far as I know, Qt does not provide a good way to do this in code either. If you really want this, you will probably have to rely on something a little hacky.
Here's my first idea: Override resizeEvent() in the widget that contains the two group boxes to get the preferred size (via sizeHint() or minimumSizeHint()) of all of the labels and set the fixed width of all the labels to the largest preferred width.
I would encourage you to ask yourself if this really matters (is it worth the development time?) and consider whether you can avoid the problem entirely with a slightly different UI design.
BTW, you might want to take a look at QFormLayout if you haven't already.