The default behaviour of the app-drawer-layout is, that the app-drawer is next to the content. Polymer calculates a "margin-left: 256px;" for the "#contentContainer", so that the drawer does not overlap the content. However, because I am loading this view via an "iron-pages" element, Polymer does not calculate the margin. The drawer overlaps the content.
If I resize the window, Polymer adds the margin. How can I force a repaint, so that the containers do not overlap?
You can call the resetLayout() method on the app-drawer-layout element.
Related
Problem summary
I'm building simple animation in which, simply, a panel expands to the right on a onTap event. The layout can be summarized as follows:
The panel has many tiles. Each tile has its own:
leading icon
title text
trailing icon
Each tile, when expanded, shows the three widgets above
Each tile, when shrinked, just shows the leading icon
The panel is scrollable to hold many icons such as these
At the end of the panel there's a simple icon which, when tapped, triggers the "expand" or "shrink" animation
The animation is built with an AnimatedContainer on the panel and a SizeTransition on the single tiles (via one single controller on the parent class)
The problem is simple: when the tiles shrink, their inner text overflows in the row.
Sample code
I just made this reproducible example on DartPad.
The obvious solution isn't helping me out
The most obvious solution is to simply wrap the Text inside a Flexible Widget: this advised by Flutter's docs and it makes sense, but unluckily it completely breaks my Layout.
Flexible introduces a flex factor that in this context is 100% unwanted.
I want my leading icons to be always at the end of the row, so my Spacer widget should "prevail" there.
I can't just play with flex factors there, as it would unintendedly hide text depending on its value.
Another code smell
Another thing I really don't like is the fact that I have to build a controller on the parent class, but I'm not actually using it on the parent class (I'm just exploiting it so I can give it to the children).
I'm new to animations in Flutter so I'm kinda confused on how I should orchestrate the whole thing here.
Any help will be appreciated / upvoted / accepted. Thank you!
As far as I understood you in a right way you just need set sizes for Row inside of SizeTransition instead of Container sizes
Here is your modified sample https://dartpad.dev/?id=a2408d29a1e8c6ce7a1cef8f21e7491d
I'd try an OverflowBox or a FittedBox (wrapping your text), depending on the result you want to achieve.
This is a Flutter Specific Query.
I Want to achieve the Layout Referenced in the Image above. Two Tabs
Below a Container.
The Tabs can be switched using Swipe Animation like that in a
Page View.
The Tabs Contain Dynamically Generated Widgets from Provider.
The Entire Page along with the Fixed Container must be
Scroll-able.
When Switching between the Tabs the fixed container should stay
in place and only tab Content(Column of Widgets) should swipe
left and right.
What I've Tried :
Using a Parent List View and Nesting the Fixed Container Child
and Using Tab Bar to switch the Widget using Animated Switcher and
Slide Animation. Here the Problem is i cannot swipe left and right
and create the Page View like Effect. I also tried Nesting Page-View
inside List-View but since the Page-View does not have a fixed height
( because the tab contents are dynamically generated ).
A few many more concepts i tried to tackle but the issue every time was
that the tab contents are not having a fixed height.
I really want to achieve this Layout and i want to know if there's any way.
How can I combine a swiper action with a fade-in/fade-out action in another area of the screen?
My screen is divided into two halves: The Top is a text widget and the bottom is a swiper widget with two pages. My goal is to fade-out the text in the top half when I swipe to the second page in the bottom half.
I'm using this dependency for the swiper widget in the bottom half: https://pub.dev/packages/flutter_swiper
I solved it by using GestureDetector widget and updated the opacity via the state.
The GestureDetector needed two functions: onDragUpdate and onDragEnd. Both changed the state of the progress which is also used to update the opacity in the other half.
Quite some work for such a small interaction, however, it works.
I'm trying to implement a scrollPanel within a Horizontal Panel.
I read this post
GWT Horizontal panel with horizontal scrolling
The answer seems great, however I'm wondering if ravi wrapped his simple panel with a scroll Panel or vice versa.
Basically I wanted to know how the panels were nested within each other?
A scroll panel is nothing special - it's just a DIV element with some CSS set on it. That's what the answer to the other question means, as a SimplePanel is simply a Widget that appears as a DIV.
So what the other answer did was create a scrolling widget by:
Creating a SimplePanel as the content container
Set some CSS with the overflow-x attribute to the SimplePanel
Setting the content will now have a horizontal scroll bar (due to the CSS attribute).
If you prefer a more direct way of doing this check out UiBinder. Using it you can combine widgets/CSS/HTML elements in a form closer to how the browser renders your UI. So for example you can create a DIV with the required CSS to achive a scrolling container.
I have to create a image button in gwt which uses three images(left side image,center stretch image and right image).Left side images and right images having rounded corners.Center Image wants to be stretched depends on button title size.Created ImageButton should have all the functionalities of Button.
Can anyone help me in how to achieve this.
If you need a button with rounded corners then there are a number of options:
Create a new widget that extends the DecoratorPanel to create the rounded corners. The DecoratorPanel will result in a table (HTML). You'll probably want to replace the standard images. Look at the standard.css that GWT provides to find the styles that define those images, then override those styles in your custom stylesheet (look for the CSS class ".gwt-DecoratorPanel"). In the widget, add a Label widget to display the button text and provide get and set methods on your widget to get and set text to the internal label. The label will resize automatically forcing the table cell to grow bigger.
Create a new widget that extends Composite. The widget should wrap a FlexTable. Use 3 cells on the same row. Add a Label to the center cell and provide get and set methods on your widget to get and set text to the internal label. The label will resize automatically forcing the table cell to grow bigger. Add the appropriate handlers to the FlexTable widget. I suggest you use those events to add or remove styles to the appropriate cells and define the background images in a stylesheet.
You could create your own widget. This requires that you generate your own HTML etc. which may not immediately work in every browser. I recommend trying option 1 or 2 first.
You might be able to get away with using only one sprite image if you can limit the maximum width of your buttons. We wrote a CssButton class (extends Button) as part of the GWT Portlets framework that uses a single background image sprite to create rounded buttons. The code uses CSS clipping to select the correct background image from the sprite based on the width of the button.
The main advantages are that it extends the normal GWT Button and uses only a single BUTTON element in the DOM (lightweight). The disadvantage is that the maximum width of the button is limited to the widest button image in the sprite.
It also handles rollover and click effects all using the same sprite.
The code is in the GWT Portlets repository if you want to look further.