I am creating menus using CreatePopupMenu and my GDI objects hold around the 1500 range but increase when the menu is showing. Now on the task bar in XP and up you can create a tool bar associated with a directory then navigate this directory in a menu. I am guessing they are creating the menus the same way however explorer's GDI objects never increase as the menu is navigated.
Any ideas on what they are doing that I may not be? Are they creating the menu the same way I am?
The XP Startmenu (All programs) and deskband "overflow" menus are actually toolbar windows, not HMENU's. I'm also guessing that they are using the shared image list for icons and the sys color brushes for the rest, so no new GDI objects are actually created.
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I have a ToolStripContainer with a MenuStrip and a ToolStrip inside, both at the top. They're arranged as usual on Windows with the menu bar above the toolbar. Now, Windows Forms and DPI scaling support has always been a bit iffy. While everything looks fine at 100 %, I'm currently using 110 % DPI scaling and the menu bar and toolbar switch positions in the ToolStripContainer (I'd suspect it's the same with higher scaling factors, though):
My guess as to why this happens is that the designer places both controls at specific locations, even though they are arranged by the container, and with DPI scaling the ToolStripContainer gets locations for its children that would be consistent with placing the toolbar above the menu bar, as if someone dragged the bars around and reordered them (which is possible interactively, after all).
Short of replacing the MenuStrip with a MainMenu, is there a simple(ish) way of ensuring that regardless of DPI scaling the order of both remains consistent? I've got about 50 different windows to change in pretty much the same manner and would also rather avoid putting extra code into the codebehind file¹.
Things I've tried so far:
All changes in the designer have been applied at 100 % scale.
Change the z-order of the toolbar and menu bar in an attempt to control their order. This works with panels and docking, but doesn't apply to ToolStripContainer, apparently.
Docking the MenuStrip at the top. Doesn't work; the designer just removes Dock = None from the code and displays Top as the default value, but with scaling applied, it's back to Dock = None in the designer (and even without touching the Form in the designer, the result at runtime is the same).
¹ These are demo applications for a control library and the main point here is to keep the code clean and still providing a good experience out of the box. So a designer-only solution where the code is hidden away in already-awful code that no one reads would be preferable.
They are very frustrating components to work with. Because they can be dragged and moved it looks like the Location is the key, even though they behave a bit like they're docked. In OnLoad or OnShown have you simply tried resetting the desired location?
menuStrip.Location = new Point();
toolStrip.Location = new Point(0, toolStrip.Height);
I have created a small gtk application that displays an RTP stream in a gtk window. I am also displaying information on top of this video by using the textoverlay element provided by gstreamer. This feels like a back door since it appears to be intended for subtitles.
I would like to display my information using methods provided by gtk. I am currently trying to use the overlay container to hold the drawing area created for the video and then placing a layout container on top of that holding labels.
I am finding that the background of the layout container is being drawn on top of the drawing area, meaning blocked. If I remove the drawing area and use two layout containers with labels in them, overlapping labels are displayed the way that I would expect.
I have tried various combinations of opacity and containers with no luck.
I'm using Clutter to compose an interactive/animate UI.
I'm using two box containers (ClutterBox) with an integrated FixedLayout, and I want to be able to rearrange those boxes onto screen using an hard-coded layout during (gtk-)window resizing. Searching in some gtk3 examples, I find out this can be achieved connecting the signal "size-allocate" of the GtkWindow. What I still unable to accomplish is to get width and height of the Embed ClutterStage.
I used gtk_widget_get_preferred_size passing the ClutterStage widget, but it gives back to me only the preferred size, and not the current, resized value.
Does anyone have a clue?
calling clutter_actor_get_size() on the stage returned by a GtkClutterEmbed widget is enough to get the size of the stage: the GtkClutterEmbed widget that owns the embedded stage resizes the stage every time GTK+ negotiates the geometry of the widgets of a window.
you can also use a ClutterBindConstraint object to bind the size of an actor to the size of the stage, or a ClutterSnapConstraint or a ClutterAlignConstraint objects to resize or align actors to the stage.
Try gtk_widget_get_allocation().
What is the best way to manage a very large amount of images (10,000+) in WPF? This is for a 2d tile map editor similar to this : http://www.mapeditor.org/ .
At the moment i have a canvas with all tiles as an image and a list box which contains the different images to choose from. Each tile is added to the canvas as children and then stored in a list for later access. You paint into the canvas by setting the Source property of a tile to the one selected in the listbox. It works well with around 50x50 tile maps but anything above that causes loading delays, in general slow application.
Any suggestions on this? Would QT maybe be more suited instead of wpf?
Thanks in advance
Check out Implementing virtualized panel series of articles.
Virtualized panels are efficient, because:
Only the displayed elements (and a few extra around the borders to enable smooth scrolling) are in the memory (and rendered).
Elements are reused, instead of being repeatedly created and discarded - an old cell is simply filled with new content (supplied with new DataContext) and used in new location.
You might also try to use WPF's DataGrid for this, it supports virtualization out of the box and is essentially what are you trying to do.
WPF is certainly able to do this, if implemented properly (if you can do that in JavaScript, you can certainly do it in WPF as well).
When a child window of my application is opened and I view the ALT+TAB menu, the application icon looks pixellated. I assume that Windows uses a low resolution version of the icon (16x16 pixel I think). What can I do that Windows selects the right version which would be 32x32 pixel?
I assigned an icon to the window in question that has 16x16, 24x24, 32x32, 48x38 and 256x256 in true color. Please note that VS says in the proterties that 32x32 is used and that it works fine for the main window of my application where I assigned the exact same icon.
The caption bar of a Windows application window display icons in 16x16 pixels. The Alt-Tab list, however, shows icons in 32x32 pixels. It uses the same icon as is set for the window. If you only set a 32x32 one, the caption bar has to scale it down, which tends to look ugly as it uses nearest-neighbor interpolation. So how does one support both?
The answer is the ICO file! It supports embedding multiple icons in one file, typically the same (or similar) icon in various sizes and, less commonly, color formats.
Browsers, Windows, and others are typically designed to smartly use the appropriately sized variant within a given ICO file. So the answer is to have an ICO file with both sizes (or more) inside. The result is that the caption bar correctly uses the 16x16 version and Alt-Tab uses the larger 32x32 one.
The methods for saving an ICO file with multiple icons inside varies from program to program. However, GIMP can easily do it (and it's free). The trick is to have your variously-sized icons as separate layers. When you go to save it as an ICO file, GIMP will prompt you with the ability to set the size and color format of each layer. A good tutorial, with images, can be read here.
If anyone has any links or suggestions for creating multi-icon ICO files in other programs, feel free to add them. Also, I'm unsure if the Visual Studio built-in image editor can do it or not — I've rarely bothered with it.
Fixed the problem. I put the icon on the wrong form. As I don't think that this question will be of any help for anybody feel free to delete it.