I have a GridView with UserControl as item. When I'm scrolling, the UserControl are loading, the background in my UserControl is tranparent, but when its loading, the color of the background is a dark gray.
Is it possible to change the "loading" color of the background?
Pretty limited information there.
Okay, so your user control could default to a loading color and when it detects the load is complete it changes its own background color to the final color.
Two, you could uses phases to control the rendering order of an item in your list. Making phase 0 your loading color and phase X (whatever is last) your final color. Complex? Yes, but would certainly work.
You would accomplish it using IncrementalUpdate. More here.
Because I don't know more how you might detect that an item is loaded, I can only hope that those first two suggestions will help. I certainly hope they do.
// best of luck
Related
I'm writing an OS X app (target 10.10, Xcode 6.1) and I'm really confused by my custom NSButtonCell subclass. It seems like there are things going on here that shouldn't. I'm new to OS X programming, so I'm asking if anyone has insight into the inner workings of NSButtonCell.
First, what seems to be working?
I can set the button's image and title. The image appears normally.
The storyboard sets up the button to be Style: Textured and Type: Momentary Change. It's not Bordered, not Transparent, and doesn't allow Mixed State.
List of complaints:
I override -drawTitle:withFrame:inView: to draw the title in a custom color depending on the cell's highlighted. This color should be #cccccc when the cell is not highlighted, but it's actually #d6d6d6.
The button has both image and alternate image. The image that's drawn is never the alternate image, so I override -drawImage:withFrame:inView: to pick the correct image for cell's highlighted. This appears to work, but what the heck, NSButtonCell? How is on/off state different from highlighted? I've tried many of the Type options and none seem to change the fact that pressing the button will momentarily change highlighted, and toggle state.
Speaking of momentarily changing highlighted, it appears that its duration is about as short as possible, so I had to implement a sort of "debouncer" to prevent -drawWithFrame:inView: from being called more frequently than a specified threshold.
My button cell also has properties myBackgroundColor and myAlternateBackgroundColor. I'm not using backgroundColor because I need to be able to draw a custom background shape (filled rect, filled circle, etc). The alternate background color is used when highlighted. The problem here is that the alternate background color should be #93edbf but appears to be #a1eecb! In order to get it to look like #93edbf, I need to set the color to #84ecb2.
So far this has all been about one particular instance of this button cell. But in another instance, the alternate background isn't drawing at all! I've read through the storyboard code and the buttons are as identical as they can be. My view controller code likewise updates both button cells' properties at the same time. Why would one button behave differently from another?
I want the button to highlight on mouse down instead of "momentarily" after mouse up. I haven't yet implemented this in my custom cell. Man, NSButtonCell is really lacking some things. How does something like that happen? Don't the OS X and iOS teams ever talk to each other?
What could it be?
I've already verified that the cell's controlTint is set to NSClearControlTint. I've checked for background filters, compositing filters and content filters on the off chance they had anything to do with this.
I know Apple really wants us to use their native look and feel for UI elements, but I never thought they'd go so far as to force the use of some highlight tint.
First Off, I found this extremely useful page on theme brushes:
http://metro.excastle.com/xaml-system-brushes
So Roughly, on startup for WinRT/XAML I am setting my theme brush for a textbox in a stylesheet:
Foreground = TextBoxDisabledForegroundThemeBrush
Background = TextBoxDisabledBackgroundThemeBrush
Which at run time makes the textbox appear as: white border, transparent background and grey text. Which I was hoping it would make it transparent, white border and white text.
On my Tapped event, I change the textbox to:
Foreground = TextBoxButtonPressedForegroundThemeBrush
Background = TextBoxButtonPressedForegroundThemeBrush
Which is supposed to be black background, white text and white border. Which seems right, but the cursor is back and you cannot see it.
First question is, am I doing this right to change my text color? I want to change the textbox so once it is selected it stays a changed color. I think this is correct. But I am not sure if I should be setting Foreground or maybe a Font Style instead?
Unfortunately you can't change caret color so if you want your TextBox editable - you should keep the background white or otherwise light. Otherwise, controlling the look of your control in its various states is best done using VisualStateManager and that is easiest to manipulate using Blend.
I'm trying to keep transparency of buttons and labels which are inside of a panel control.
I set the BackColor properties to Transparent, but it doesn't work.
Also I tried
Me.SetStyle(ControlStyles.SupportsTransparentBackColor, True)
Me.Panel1.BackColor = Color.Transparent
but it doesn't seem to work.
The screenshot below is our design plan. We try to set an image below the panel, buttons and Menu Strip. Can you tell me please if this is possible, and if so, how to?
http://www.gomidjets.com/images/upper.png
With regards to custom designing your Form in WinForms, it isn't supported very well. Only some of the controls support transparency, and it really impacts on performance. If you are avid that it must be transparent, make sure that your Form has its TransparencyKey set to a value, and then change each of the Panels, Buttons, Labels and MenuStrips background to this color (Usually some obtuse color).
If your program is in its early stages, I strongly suggest that you give WPF some serious consideration. From the level of customization to your Form you are doing, you would be much better doing WPF. I myself have just moved over, and this is a screeny of my first project in WPF (And I've learnt this all from StackOverflow, so you should pick it up pretty fast!)
As you can see, literally everything on that form has been customised, and every single control supports full Transparency!
I have a series of items in a GridView.
I want to animate the TranslateTransform of a GridViewItem so that it is outside the boundary of the GridView. When I do, it is clipped. Is this type of transform possible?
Sadly, I don't think so. I had to do something similar a while ago and it turns out that the template of a GriView (and ListView, ListBox, etc...) contains a ScrollViewer control. The thing about the ScrollViewer controls is that they MUST define a clipped viewport to give the user the impression of scrolling. In fact, if you were to decompile the ScrollViewer control, you can see that it hard codes the clipped bounds, so you cant even change the template or style.
Things may have changed since I looked into this, and my investigations where on WPF not XAML in Windows 8, but I dont think that it would have changed based on your description of the issue.
Here is a SO question in relation to this topic: WPF clipping even when no clipping is desired - how to turn it off?
I successfully changed the background color of a Gtk.TextView (GTK3) with method override_background_color:
color.parse(self.settings.get_string("bgcolor"))
self.ui.NoteView.override_background_color(Gtk.StateType.NORMAL,color)
I also override the foreground color.
Unfortunatelly in that case making a selection in the text is invisible.
How can I modify the background and foreground color of a TextView without loosing the visible text selecting?
It's best to format the text in a GtkTextView by using GtkTextTags. You can apply any sort of text formatting(background & foreground colors, font, size, weight, etc..) to any portion of the text.
Click here for an example.
Hope that helps!
By the way, what you're doing is changing the style of your TextView. In Gtk it's best to stay away from doing this, especially if you aren't in a controlled environment or plan on releasing your software for others to use, because gtk's philosophy is to leave the styling and theming up to the end user for their own personal touches/needs.
This is why you are getting some unwanted results by overriding style colors.
In terms of a GtkTextView it does however offer simple formatting of the text(even support for adding images/widgets) via use of GtkTextTags as the link shows above.