UIViewController's topLayoutGuide and bottomLayoutGuide are deprecated in iOS 11. What should be the replacement?
Previously in your UIViewController:
customView.topAnchor.constraint(equalTo: topLayoutGuide.bottomAnchor).isActive = true
customView.bottomAnchor.constraint(equalTo: bottomLayoutGuide.topAnchor).isActive = true
Now you should use:
customView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor).isActive = true
customView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor).isActive = true
Note the change from bottomAnchor to topAnchor. This is because the top layout guide was a rectangle at the top of the view controller, so in order to constraint your content to the top, you wanted the bottom anchor of the guide. The new safe are layout guide is a rectangle portion of the view unobscured by bars and other content, so you want the top anchor. And vice-versa for the bottom layout guide.
Related
I want to develop new features in Quod Libet music player.
I need to increase size of specific scrollbar.
There's a function already exists to apply css to a widget:
def add_css(widget, css):
"""Add css for the widget, overriding the theme.
Can raise GLib.GError in case the css is invalid
"""
if not isinstance(css, bytes):
css = css.encode("utf-8")
provider = Gtk.CssProvider()
provider.load_from_data(css)
context = widget.get_style_context()
context.add_provider(provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
So I try to apply css as this:
self.scrollwin = sw = ScrolledWindow()
sw.set_shadow_type(Gtk.ShadowType.IN)
#get scrollbar
vscrollbar = sw.get_vscrollbar()
# 1rst attempt
# qltk.add_css(vscrollbar, '* slider {min-width: 20px;}')
#2nd attempt
qltk.add_css(vscrollbar, 'scrollbar.vertical slider {min-width: 20px;}')
I've got same error with 2 attempts:
'min-width' is not a valid property name (3)
Update 1
I try #Herbalist solution, scrollbar component is resized but "slider" always have same size. It add spaces on right and on left of "slider".
vscrollbar.set_size_request(50,-1)
Is it possible to resize slider of scrollbar ?
Screenshot of result (I outline part of scrollbar in green):
I'm not able to success with css, so I use deprecated method:
GtkRange:slider-width has been deprecated since version 3.20 and
should not be used in newly-written code.
Use the min-height/min-width CSS properties on the slider element. The
value of this style property is ignored.
As this:
qltk.add_css(vscrollbar, '* {-GtkRange-slider-width:40px}')
get_vscrollbar() returns a Gtk.Widget so you could try setting the "width-request" property
Disable width and height fields from image properties I am using ckeditor 4
CKEDITOR.replace('<%=txtCkEditor.ClientID %>', {allowedContent:'img[!src,alt];'});
By using above method it shows only image properties with width and height hidden and rest of the controls also get visible false. Kindly suggest me a solution for disabling the width and height fields from image properties windows.
Thanks in advance.
I'm not sure I entirely understand your question. It seems you want to hide the fields that allow input of height and width. Your initial solution doesn't seem to affect the dialog box, but what content gets saved. These are very different kinds of solutions. My answer assumes you're seeking to alter the image properties dialog box fields.
Based on this earlier question, I recommend adding the following configuration:
CKEDITOR.on('dialogDefinition', function(ev) {
var editor = ev.editor;
var dialogName = ev.data.name;
var dialogDefinition = ev.data.definition;
if (dialogName == 'image') {
var infoTab = dialogDefinition.getContents( 'info' );
infoTab.remove( 'txtWidth' ); // Remove width element from Info tab
infoTab.remove( 'txtHeight' ); // Remove height element from Info tab
}
});
if create WC_LISTVIEW with LVS_REPORT style and set both LVSIL_SMALL and LVSIL_STATE (or with LVS_EX_CHECKBOXES) image lists and heigth of small images is less than heigth of state images - list incorrectly displayed: small images not centered by Y, but on same line with state images, and bottom lines (exactly CY_state - CY_small) is filled by trash. for example on high DPI display, ListView with LVS_EX_CHECKBOXES use 20 pixel heigth for CY_state, if use 15 pixel small icons - will be ~next picture (left side of image). if change state images heigh to <= CY_small will be normal displayed (right side of image)
this is known bug ? or exist ways resolve this ?
yes, this is ListView bug - present in all windows versions, including latest win10 builds.
bug in function
int CLVView::ComputeCYItemSize()
here exist next code:
int CLVView::ComputeCYItemSize() // this -> CLVReportView
{
// CListView* _pListView;
CLVImageListManager* p = _pListView->_pImageListManager;
...
if (p->_himlState)
{
p->_cySmall = max(p->_cyState, p->_cySmall);// bug !! need remove this line
...
}
...
}
if 'nop'
p->_cySmall = max(p->_cyState, p->_cySmall)
under debugger - all begin working ok and have next view:
I'm designing a UI in Xamarin.Forms to collect feedback from users about our application. There is an Editor control at the bottom of this page. On an iPhone 4S, and in many landscape orientations, the keyboard completely obscures this editor control. On Android, this is not a big deal because the OS automatically scrolls (though the sizing behavior is a little weird.) On iOS, the only things resembling solutions are very wonky.
In native iOS, the solution is simple: wrap your views in a UIScrollView, then when the keyboard appears add that much space to the content size and scroll appropriately. Xamarin doesn't expose anything to control the scroll position in ScrollView, and ContentSize is private, so that's out. A few posts (here and here) seem to indicate ScrollView is at least part of the solution. It does appear Xamarin has some automatic scrolling behavior, but it's... curious.
My layout is fairly simple:
At the top, a fixed navigation bar that I do not want to scroll out of view.
Beneath that, a 180px tall image that represents a screenshot of the application.
Beneath that, a label with information such as the timestamp. (2-3 lines of text).
Beneath that, the editor, filling the remaining available space.
I've included code for a layout I've tried at the bottom of my post. I created a StackLayout that contains the image, the label, and the editor. I put that inside a ScrollView. Then, I create a RelativeLayout and place the navigation bar at the top-left with the ScrollView beneath it.
What I want to happen when the Editor is tapped is for the keyboard to be displayed and, if it obscures the Editor, for the layout to be nudged upwards to make the Editor visible. What happens instead is it seems like Xamarin scrolls the layout upwards by the keyboard height plus some margin that looks suspiciously like the keyboard utility bar height. This shoves the Editor upwards so high it's obscured by the navigation bar.
I've tried a lot of different tweaks and I'm at a loss. I can't control enough of the ScrollView to get the behavior I need. I've seen suggestions that use a BoxView resized when the Editor gains focus, but to make it work really well I'd still have to hook into the iOS notifications to get the appropriate size and have a fairly intimate knowledge of where my Editor's bounds are. It feels wrong.
Does anyone else have a solution to this on Xamarin.Forms? Even if I have to dip into native, I'd like an answer.
(Here's an example layout that demonstrates the problem, there's a little bit of weird structure because I was debugging. The funky colors are also a relic of layout debugging.)
using System;
using Xamarin.Forms;
namespace TestScroll
{
public class MainPage : ContentPage {
public MainPage() {
InitializeComponent();
}
private ScrollView _scroller;
protected void InitializeComponent() {
var mainLayout = new RelativeLayout();
var navbar = new Label() {
BackgroundColor = Color.Blue,
TextColor = Color.White,
Text = "I am the Nav Bar",
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.StartAndExpand
};
var subLayout = new ScrollView() {
VerticalOptions = LayoutOptions.FillAndExpand,
HorizontalOptions = LayoutOptions.FillAndExpand
};
_scroller = subLayout;
var subStack = new StackLayout();
subStack.Spacing = 0;
subLayout.Content = subStack;
var image = new BoxView() {
Color = Color.Green,
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.Fill,
HeightRequest = 300
};
subStack.Children.Add(image);
var infoLabel = new Label() {
BackgroundColor = Color.Blue,
TextColor = Color.Black,
Text = "Timestamp!\r\nOther stuff!",
VerticalOptions = LayoutOptions.Start
};
subStack.Children.Add(infoLabel);
var editor = new Editor() {
VerticalOptions = LayoutOptions.FillAndExpand
};
subStack.Children.Add(editor);
mainLayout.Children.Add(navbar,
Constraint.Constant(0),
Constraint.Constant(20),
Constraint.RelativeToParent((parent) => parent.Width),
Constraint.Constant(70));
mainLayout.Children.Add(subLayout,
Constraint.Constant(0),
Constraint.RelativeToView(navbar, (parent, view) => navbar.Bounds.Bottom),
Constraint.RelativeToParent((parent) => parent.Width),
Constraint.RelativeToView(navbar, TestConstraint));
Content = mainLayout;
}
private double TestConstraint(RelativeLayout parent, View view) {
double result = parent.Height - view.Bounds.Height;
Console.WriteLine ("Lower stack height : {0}", result);
Console.WriteLine ("Scroll content size: {0}", _scroller.ContentSize);
return result;
}
}
}
One thing I notice is that you are adding a ScrollView (subLayout) to another ScrollView (_scroller).
Also, I ran into this same problem on iOS except all of my controls were within a Grid. Simply putting the Grid into a single ScrollView fixed the problem, without having to change content sizes or anything like that.
This question sat for a long time unanswered, here's what I did. I don't know that it's the 'answer', and I do appreciate hvaughan3's answer that's currently here and I will try it if I ever get the time.
My page behaved like I wanted on Android, so I didn't do anything specific for that.
So I wrote specific code for iOS that used the notifications UIKeyboardWillShow and UIKeyboardWillHide. These notifications provide information about the bounds the keyboard will take up. So when I get a 'show' notification, I manipulate my layout to allow room for an element of that size I place underneath the keyboard. When I get a 'hide' notification, I reset the layout.
It's janky and a little embarrassing, I hope to come back with news I tried another solution like hvaughan3's and it worked.
I have a question that might seem "basic" but I just cannot figure out how to do it...
I have a box and I'd like to change the borderColor. Till there, nothing special. Just a box.bordercolor = xxxxxx...
BUT, I'd like to have the top and bottom border with one color, and the left and right border with another color... And that's the part where I'm stuck.
Any tips? Suggestions?
Thanks for your help and time! ;)
Regards,
BS_C3
#Senz
Hi!
Unfortunately, I won't be able to share the code without making it "incomprehensible"...
But this is the idea... We have 2 main components: ArrowButton and Navigator.
ArrowButton is a hbox containing a label and an image (this image is the arrow tip and it changes depeding on the state of the ArrowButton).
Navigator is a hbox containing a series of ArrowButton. An ArrowButton overlaps the arrowButton on its right in order to create the pointed end of the button.
And then you just create a whole bunch of functionnalities around these components.
I hope this helps... Do not hesitate if you have some more questions =)
Regards.
I noticed you are asking about the Flex 3 SDK. Skins are a good approach. They have changed somewhat in Flex 4(for the better IMHO). If you are wanting to use the Flex Drawing API, then just extend the Box class into a custom class that would look something like this:
public class MultiColorBorderBox extends Box
{
// You could add getters/setters or constructor parameters to be able to change these values.
private var topColor:uint = 0xFF0000;
private var rightColor:uint = 0x00FF00;
private var bottomColor:uint = 0x0000FF;
private var leftColor:uint = 0xFF00FF;
private var borderWidth:Number = 20;
public function MultiColorBorderBox()
{
super();
}
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
{
super.updateDisplayList(unscaledWidth, unscaledHeight);
// This just ensures you dont have content under your border
this.setStyle("paddingLeft", borderWidth);
this.setStyle("paddingRight", borderWidth);
this.setStyle("paddingTop", borderWidth);
this.setStyle("paddingBottom", borderWidth);
var g:Graphics = this.graphics; // This creates a new Graphics object and sets it to the MultiColorBorderBox graphics object. Since Box (superclass) descends from a Sprite object, it has a graphics object automatically.
g.clear();
g.moveTo(0,0); // Moves the position to the top left corner
g.lineStyle(borderWidth, topColor); // Sets the line style with the width and color
g.lineTo(unscaledWidth, 0); // Draws the top border from top left to top right corners
g.lineStyle(borderWidth, rightColor); // Changes the line style
g.lineTo(unscaledWidth, unscaledHeight); // Draws the line from top right to bottom right
g.lineStyle(borderWidth, bottomColor); //Changes the bottom border style
g.lineTo(0, unscaledHeight); // Draws the line from bottom right to bottom left
g.lineStyle(borderWidth, leftColor); // Changes the border color
g.lineTo(0,0); // Closes the box by drawing from bottom left to top left
}
I'm pretty sure you're going to have to create a borderSkin to accomplish this. I believe these are created in an external program, such as Flash Professional; but more info is in the docs.
I don't think that Flex makes any distinction between top/bottom borders and left/right borders. Creating a skin would certainly be the nifty-slick way to do it. A programmatic way might be to use box.graphics to draw your border by hand. I'd start by trying to override the updateDisplayList() function to draw your border...
I finally did a pretty simple thing.
I guess I wasn't detailed enough regarding the specifications.
The actual aim was to create a navigator with arrow shaped buttons.
Each button had to be highlighted when it was selected. And this http://www.freeimagehosting.net/uploads/bcd0d762d7.jpg is how the navigator looked like.
Each button is actually an HBox containing a Box (with a label) and an Image (for the arrow tip), with a horizontalGap = 0.
I didn't think about adding a glowfilter to the button. So I was trying to just change the colors of the top and bottom part of the Box...
So, the glowfilter in the button worked pretty well.
Sorry for the lack of explanations about the context >_< And thanks for your answers!!
Regards.