Can't find any manual about changing width of taglist element size.
Taglist element is wider than icons I had set. It looks really awful =(
Screenshot: http://s12.postimg.org/fkva7xywd/Screenshot_16_02_2014_16_04_07.png
Taglist element consist of icon, text and gap between them. This gap defined in awful.widget.common.list_update function in line
m = wibox.layout.margin(tb, 4, 4)
Despite you have no text, double gap is still here. To solve this problem you can copy list_update function to your rc file, fix it and send as fifth(!) argument in awful.widget.taglist.
just tell your imagebox not to be resizable, example:
wibox.widget.imagebox(beautiful.clock, false)
or you can even resize you wibox:
mywibox[s] = awful.wibox({ position = "top", screen = s, height = 32 })
you just need to modify height value
or another method using wibox.layout.constraint:
clock_icon = wibox.widget.imagebox(beautiful.clock, true)
local const = wibox.layout.constraint()
const:set_widget(clock_icon)
const:set_strategy("exact")
const:set_height(16)
then, instead of adding your icon to the layout, just add the constraint.
Related
I'm trying to update the Listbox in PySimpleGUI to resize based on length of list but the update(size=len(mylist) says that size is not an allowed argument. Any work around to this?
I've seen some people try to make the window/layout into a function but I'm not sure if that's the right approach.
Thanks in advance.
Basically, the height or the width of a Listbox element should not be revised after initialized, or the size of window will be also changed and maybe out of screen.
There's no option provided to change the height or the width of the Listbox element in PySimpleGUI, but you can do it by tkinter code, element.Widget.configure(height=height, width=width).
Example Code
import PySimpleGUI as sg
name_list = sorted(['James', 'Robert', 'John', 'Michael', 'David', 'William', 'Richard', 'Joseph', 'Thomas', 'Charles'])
layout = [
[sg.Input('', key='Name'), sg.Button('Add')],
[sg.Listbox(name_list, size=(20, len(name_list)), expand_x=True, key='Names')],
]
window = sg.Window('Title', layout, finalize=True)
window['Name'].bind('<Return>', ' Return')
while True:
event, values = window.read()
if event == sg.WINDOW_CLOSED:
break
elif event in ('Add', 'Name Return'):
name = values['Name']
if name and name not in name_list:
name_list = sorted(name_list+[name])
window['Names'].Widget.configure(height=len(name_list))
window['Names'].update(values=name_list)
window.move_to_center()
window.close()
I have a UITextField that will display floating point values between 0 and 1.0 with 3 digits after the decimal point. So the widest text it will show is something like "0.000". I'd like to set the auto layout width constraint so that the text field always has just enough room to display this value.
The code below is close, but does not work.
let biggestString = "0.000"
let textAttrs = [NSAttributedStringKey.font: myField.font]
let size = (biggestString as NSString).size(withAttributes: textAttrs)
myField.widthAnchor.constraint(equalToConstant: size.width).isActive = true
It ends up displaying "1.0..." I'm guessing this is because a UITextField has some kind of padding around the text, so so I need to set the width to be the string width + the padding. But, I don't see a property from which I can read this padding amount. Is there a way to get it?
Try searching for the 'intrinsicContentSize'. According to the documentation this is what has to be set to indicate to the auto-layout how big the content is.
There was also a more elaborate discussion on how this can actually if the layout settings do not allow the resizing to work, see other question here:
How to increase width of textfield according to typed text?
I am trying to create a button in a Xamarin Forms cross-platform app (iOS and Android), where the button has both text and an image. The XAML is pretty straightforward:
<AbsoluteLayout ...>
<Labels and backgrounds and such>
<Button x:Name="HomeButton2" TranslationX="6" TranslationY="100"
BackgroundColor="#efeff4" TextColor="#4a4a4a"
WidthRequest="58" HeightRequest="76"
ContentLayout="Top,5"
Image="TaskBar_Assets_HomeButtonIcon.png" Text="Home"
Clicked="HomeButton_Clicked" />
</AbsoluteLayout>
but what I get on the iPad is a button where both the image and the text are strangely pushed over to the side:
(the source image "TaskBar_Assets_HomeButtonIcon.png" is 47 x 44 so it should fit fine in the overall button area)
The only way I can find to make this look better, is to make a custom control based on Button, and then I can see that several of the properties of the underlying UIButton seem wonky:
The Control.ImageView.Frame is all zeroes:
Control.ImageView = <UIImageView: 0x12df52940; frame = (0 0; 0 0);
clipsToBounds = YES; opaque = NO; userInteractionEnabled = NO;
layer = <CALayer: 0x173623180>>
The Control.ImageEdgeInsets and .TitleEdgeInsets look odd (the right + left seem like they leave no space for the image or text):
Control.ImageEdgeInsets = {-8.9501953125, 20.33935546875, 8.9501953125, -20.33935546875}
Control.TitleEdgeInsets = {22, -23.5, -22, 23.5}
What I'm doing, is adjusting the Control.ImageEdgeInsets so that Control.ImageEdgeInsets.Left is equal to the half of the (button width minus the image width) and setting Control.ImageEdgeInsets.Right to zero (for no particular reason except that it works)
and then figuring out what to set Control.TitleEdgeInsets was done with trial & error, I ended up with values related to the width of the "Home" text (41 pixels):
Control.ImageEdgeInsets updated to {-8.9501953125, 5.5, 8.9501953125, 0}
Control.TitleEdgeInsets updated to {22, -50, -22, -9}
That results in a reasonable button look:
although it looks like I need to do more trial & error to get the text "Home" actually centered.
But why do I need to go through all this? Why doesn't the button just display text & image correctly in the first place?
And if I do have to go through all this, why are the values for Left & Right for ImageEdgeInsets and TitleEdgeInsets so different?
Most of the articles I have read about images on buttons suggest constructing your own using an Image and a Label in a grid using a gesture recognizer to handle the tap.
You could also try a button and an image in a grid.
Use Margin to adjust placement.
I try and stay clear of absolute layout.
Here's the ButtonRenderer source code from Xamarin.Froms.If you set the ContentLayout to Top, the below codes will be run:
void ComputeEdgeInsets(UIButton button, Button.ButtonContentLayout layout)
{
...
var horizontalImageOffset = labelWidth / 2;
var horizontalTitleOffset = imageWidth / 2;
...
button.ImageEdgeInsets = new UIEdgeInsets(-imageVertOffset, horizontalImageOffset, imageVertOffset, -horizontalImageOffset);
button.TitleEdgeInsets = new UIEdgeInsets(titleVertOffset, -horizontalTitleOffset, -titleVertOffset, horizontalTitleOffset);
}
As the codes show, the Left offset of image is horizontalImageOffset which is labelWidth / 2. The Left offset of title is horizontalTitleOffset which is imageWidth / 2.
So, when the text is wider, the left offset of image will be bigger. When the image is wider, the left offset of text will be bigger.
Edit:
In native iOS, the default layout is like the left image: Image is at left and Label is at right. In Xamarin for Top setting, Xamarin moves the Image up and right, moves the Label down and left to makes them like the right image. I paint this illustration, hope it clear.
I have two multiline UILabels. The parent UIView only has a certain size (height) but the labels can contain a long string. What I want is that the first label is always shown (e.g. abbreviated with ... if it gets too long). If there is room the second label should be shown. Again if it's too long it should get abbreviated with ...
This is the constraint I'm currently using: V:|-5-[title]-0-[description]-(>=0)-|
In some cases the second label gets cut off like this:
What should I do? Do I have to change the constraint? Can I hide the second label somehow? But how should I detect when the label is cut off?
In another case the second label wasn't shown at all. The second label should also not overflow the parent UIView. How should one handle such cases?
I believe rounding occurs somewhere in iOS because the label would fit (one line and then at the end with ...) if there would be 0.75pt more space. So it draws it but it is cut off because of the missing 0.75pt space.
Now I took the following approach: Calculate if the second label (reference text which should be about one line) would fit in the parent view? And if not hide it. I only have code in C# but you should get the idea:
public override void LayoutSubviews ()
{
base.LayoutSubviews ();
NSString referenceTextToMeasure = new NSString ("Lorem ipsum dolor sit amet.");
// take the font of the description label which was cut off
CGRect referenceTextRect = referenceTextToMeasure.GetBoundingRect (
new CGSize(this.Frame.Width, nfloat.MaxValue),
NSStringDrawingOptions.UsesLineFragmentOrigin,
new UIStringAttributes () { Font = descriptionLabelFont },
new NSStringDrawingContext ()
);
// 5 is the spacing constraint I have on the top
if ((this.Frame.Height - TitleLabel.Frame.Height - 5) < referenceTextRect.Height )
DescriptionLabel.Hidden = true;
}
Seems to work quite well, though a full test has to be made. You could also use a fixed height instead of referenceTextRect.Height and you would save some calculations. Nevertheless, the way I used allows of adapting the fonts so everything is dynamically calculated.
im new to dart and need to create a dynamic dom structure.
At the moment i use the dart_web_toolkit but im missing a position function for elements.
You can set the width and height but no position(top, left) for the element.
Am i missing something there, or can someone give me a solution for this?
Edit:
I have a Label with 2 Buttons in it and i can edit the Buttons size with "setPixelSize"
but i need something like "b1.setPosition" and i cant find this method to position my elements (in this example buttons).
At the moment they are just put after another in relation to the Label.
final el = querySelector('#body');
ui.Label rootLabel = new ui.Label();
rootLabel.addStyleName("root-style");
ui.RootPanel.get().addWidget(rootLabel, el);
final el1 = querySelector('.root-style');
ui.Button b1 = new ui.Button();
b1.text = "Button 1";
b1.addStyleName("b1");
b1.setPixelSize(30, 50);
ui.RootPanel.get().addWidget(b1, el1);
ui.Button b2 = new ui.Button();
b2.text = "Button 2";
b2.addStyleName("b2");
b1.setPixelSize(60,60);
ui.RootPanel.get().addWidget(b2, el1);
I just looked a bit thought the code of https://github.com/akserg/dart_web_toolkit/blob/afac7aac09e3bcd9d3e1f926815eb85040e46e07/lib/src/ui/button_base.dart
and it seems you should get the Element instance by calling b1.getElement() which should allow to access all elements properties like
b1.getElement().style
..position = 'absolute'
..top = '10px'
..left = '25px';
not tested though.