I am testing a godot app, where there is a text heading along the top, and there are buttons along the bottom. For now I have a spacer in the middle to keep the heading at the top and the buttons at the bottom.
If I set Project Settings -> Display -> Stretch to disabled, then I can set a font and button size that looks reasonable for my laptop, and the font size for the heading and button doesnt shrink smaller and larger when the window is adjusted.
How do I guarantee and/or test that the size will be appropriate when the application is exported to iOS and Android? Is there some kind of guide that will help choose appropriate (non scaleable) button sizes for all devices?
How Controls are positioned
There are three intended ways to position a Control in Godot:
Placed in a Container. In this case the Container will control position and sizing of the child Control, taking into account "Size Flags".
See also Using Containers, and Containers.
By anchors (anchor_*) and margins (margin_*). They determine the position of the edges of the Control. The anchors are factors, and the margins are offsets.
For example, the leftmost part of the Control will be positioned at anchor_left * parent_width + margin_left, relative to the parent Control.
You will find presets in the "Layout" menu that appears in the tool bar when you have a Control selected.
See also Size and anchors.
By rect_position and rect_size. These are relative to the top left corner of the parent Control.
Ultimately the other ways to position the Control are changing these. And you can also change these even if you positioned the Control by other means… Which is not intended, but supported (because it is useful to add animations to the UI among other things).
Regardless of which one you use, Godot will respect rect_min_size. And yes, there is also rect_rotation and rect_scale which throw a wrench on the above explanation, but they works as you would expect.
And yes, it is not the easier to use system. Because of that, the designer is being improved for Godot 4 (currently on Alpha 3 at the time of writing).
To answer the question the title: If your stretch mode is set to disabled, and your UI is anchored to the top left (which is the default), you would resize the window and the UI would not scale or adapt to that change. I don't think you don't want the UI to adapt.
Making a top and bottom bars with containers
You can use a VBoxContainer, since we will have three bars stacked one on top of the other, vertically. And yes, the second one is a spacer.
First of all, you want the VBoxContainer to take the whole screen. So set it to the Layout preset "Full Rect". So, yes, we are placing the Container by anchors and margins.
And second, we want the spacer to take as much space as possible. To archive this we set "Expand" flag on size_flags_vertical of the spacer. This is what Size Flags are for.
And, of course, what you place inside the Container might or might not be more Containers.
Making a top and bottom bars with anchors and margins
Give the top bar the "Top Wide" preset. It will set the margins and anchors to have it stay at the top, take the full width, and take its minimum height.
And give the bottom bar the "Bottom Wide" preset. It will set the margins and anchors to have it stay at the bottom, take the full width, and take its minimum height.
You would need no spacer.
And, by the way, I remind you that anchors are margins are relative to the parent. So you can nest this approach. And yes, Controls that are not containers can also have children Controls
About stretch modes
As you know you have a choice between:
viewport: All the sizes will be computed with the original resolution, and then the resulting sizes are scaled to the resolution of the device.
2D: will also compute all the sizes with the original resolution, but instead of scaling the resulting sizes, it renders at that size and scales the image.
disabled: It will compute all the sizes with the actual resolution of the device. No scaling will happen.
Since both viewport and 2D, the size of the UI will not be computed with the actual resolution of the device. This makes the approaches I described to have the UI adapt less effective (less useful or less necessary, depending how you look at it). And thus, if we want to use those approaches effectively we will want the stretch mode set to disabled.
And, of course, there is also the aspect setting.
See also Multiple resolutions and Support multiple form factors and screen sizes.
Designing for small resolution
You can test on the editor how the UI adapts to the resolution, either by resizing the window, or by setting the Test Width and Test Height in Project Settings. You can, of course, also test on an actual smartphone. For instance, I often launch the game in my Android from the Godot editor when developing mobile games.
Circling back to the stretch modes, this is what happens with the text:
disabled: The text stays the same size. This means that the UI can become too small for the text.
viewport: the text scales. This means that the text can become too small to be legible.
2d: the text scales too… except since it is a image scaling it can become blurry, even harder to read.
If we only consider the text, there is no good option. Now, either design the UI for the specific target resolution… Or make one that can adapt. And for one that can adapt, I believe disabled is the best stretch mode as I was arguing above.
And of course you can script it
If you need to run some code when the resolution changes, you can connect to the "size_changed" signal of the root Viewport. And if you need to figure out if the device is in landscape or portrait mode you OS.screen_orientation, and if you really have to, you can create a custom Container.
I am trying to create a specific solution for weeks now and I have tried many things but I am just not sure if it is possible at all to achieve. I need your opinions and point me in direction o a correct approach. Following what I am trying to create:
Initially there is a tile layout in which a certain number of cards (say 12) are placed in 4x3 grid:
Now, if user clicks on a tile (Box 3), the state changes to following:
Selected tile is expanded and other tiles get aligned one below another on the right side:
Challenge is that I want to create a transition from every tile's initial state to the state where every tile is aligned one below another on the right. At the same time, when a tile is clicked it is expanded in place.
Note - there are no sudden change in positions, no reload of page and preferably no JS (I wanted to write a CSS-only solution). Everything smoothly animates to new position. From the second screen if a different tile is selected (from right), then the expanded item will shrink and go in to the right hand stack while the selected item will expand and take place of the currently expanded (B3).
If you could just point me to correct direction it would be great help.
thanks.
You should check css flexbox.
Using the "order" proprety, you could asign order of every box from 2 to 8,
and each time a box is selected, you change it's order to 1 and you also change its size and colour.
However, I don't think you can use 'click' actions with css only.
I would recommend using JS for what you are trying to achieve.
Hope it helps
I am trying to place two svg files side by side in a web page. This I have done using susy to create the spans, first one is 2 columns wide, the second 10 columns. I place a narrow bar graph in the first span, and a wide line graph in the second span.
The problem I am having is scaling the graphs. they look like this:
But I want them to look more like this:
They are svg files generated with pygal and I achieved the second image by forcing a size in pygal, but it's not elegant and fails wehn the screen size changes.
How can I make the svg bar chart scale the height without scaling the width and do it dynamically in a web browser instead of manually changing the size in pygal? I also cant manually edit the svg files as they are generated via another system and update frequently.
Your graphs should load in two different divs, so that you can set a different width style for each, depending on a view-based css class (like col based classes in Twitter Bootstrap). If you load dynamic svg's (without any explicit_size setting in Pygal) you should be able to handle different window sizes.
What is the HTML CSS solution for highlighting specific areas of a map/floor plan like this?
http://www.centrecourtshopping.co.uk/store-info/
They use sprite image look here.
Basically, it works like that:
The map with dark-blue regions is completely static.
There is invisible layer on top of it made from small rectangular in their case <a> -- each corresponds to single dark-blue region and posses its its own id.
When cursor is placed over a rectangular with id x the sprite image is nicely aligned with its background (by setting CSS's background-position).
Do not think, this magic would be possible without using JavaScript.
I know there are many techniques how to stretch the image to the whole page. I like the ones based on "background-size: cover", but if it is justified, I can use another technique. My problem is that I need to hook links to some parts of this background image with some hover effects - imagine a picture on castle in the background highlighting its different parts when you hover them with mouse.
Note:
I prefer imagemap solution, because it allows polygon shaped hotspots.
Note that I do not want components on top of the image having it's own dimensions.