i have a one image control in grid and one grid splitter in the grid also one List<imgobject>, imgobject contains 3 images img48, img32, img24 how can i change the image according to with of grid cell,List<imgobject> is bind with on stack panel which is inside the grid cell
width >= 100 then 64
Width <= 70 and >= 50 then 32
else 24
When i move gridsplite left side then grid cell width was change according to spliter movement at that time wants to change image in image control
I assume you are asking how to load images dynamically at runtime? If so, here is how I do it:
img = New Image
img.Source = New Imaging.BitmapImage(New Uri("/APPNAME;component/Images/home.png", UriKind.Relative))
APPNAME = the name of your application.
Images = the folder name I keep my images in
Home.png = the file I want to load
Related
For my Firemonkey multi device project in Delphi 10 Seattle i've created a .style sheet with multiple button styles which contain an image. In order to show the image the right way I want to set a fixed size for the button if the styles are set.
Like if you give a button the stylelookup additemstyle it will have width and height of 48 and you can't resize the button. I want to do the same.
How can I accomplish this? I've already tried to lock the style component and set the size there, but I can still resize the button.
I am working on a FLEX / AIR Spark list which lists a collection of images with differing width and height.
I am using a custom layout which works this way:
decide how many images can be fit in the current row based on their widths.
justify them in such a way that first image in the row obeys the "left" margin and the last image in the row obeys "right" margin, so with the "top" and "bottom" as specified by the user, let us say 10 pixels.
As an example, assuming that the current row has 4 images, the images 1 & 4 will have 10 pixels each as "left" margin "right" margin respectively. But the left and right gaps between 1-2, 2-3 & 3-4 will be equally divided based on the varying widths.
now i would like to draw a background that will fill the dynamic area. Please see the image below to get an idea:
Layout requirement Image
** In the image, The grey area is the background I would like to draw, and the colored rectangles represent images of differing widths and heights.**
the "rowHeight" is variable based on the maximum height of individual images within the row.
Issues:
a) Now I would like to draw a background (see the grey area in the pic) that fills the background area of the list. I know the current item's width & height, but I don't know the rowHeight decided by the layout, left and right margins between the images.
Something like:
bgRect:Rectangle = new rectangle ( 0, 0, (imgWidth + (LeftMargin/2) + (Right Margin/2) ), rowHeight)
b) How / where should the background be implemented? if i add the BG area within the item renderer based on the layout, again the layout will be relaid.
Children should be added in the createChildren method. Drawing (painting) the background should happen in updateDisplayList method.
You can pass data to your itemrenderers via an itemrenderer factory. See - Flex - Sending a parameter to a custom ItemRenderer?.
var productRenderer:ClassFactory = new ClassFactory(ProductRenderer);
productRenderer.properties = { showProductImage: true };
myList.itemRenderer = productRenderer;
I want to allow the user to resize the GridView extension's columns' but the total width of the grid should be fixed.
I am currently using these settings.
settings.Width = 1200;
settings.SettingsBehavior.ColumnResizeMode = ColumnResizeMode.Control;
settings.Settings.HorizontalScrollBarMode = ScrollBarMode.Auto;
Though they cause the columns to resize, they also resize the width of the grid when I resize the columns.
Some important things:
a) I am using ASP.NET MVC 4 and DevExpress v12.2.10.0
2) My grid has just 2 columns.
You have to use ColumnResizeMode.NextColumn in the settings of the GridView.
From the documentation:
Changing a column's width changes the next column's width.
I'm trying to write my flex application so that it restores the user's settings when it starts up. The application has 3 data grids (only one is visible [on screen] at any time) and I simply save the state of the grids if the user ever does any resize events.
Saving the state works perfectly, the problem comes when restoring. It seems that only the visible data grid gets restored properly. On all the other grids, the widths are all wrong and do not match the settings I restored from.
The problem is that, when the application starts, the data grids are not sized correctly. Each data grid takes up the full screen, but initially they are only given a very small size (ie. 200 width)
Is there some way to force the data grid to resize properly when it is created? Or is it possible to know when the data grid is "maximized" I don't want to hook up to the resize event - if possible - because I would get that quite frequently, and I only want to restore the settings once.
Here's the code I'm using to restore the column widths:
var grid:DataGrid = ...;
... for each column ...
... parse width into width (ie. width is now "320")
// If it's in the config, it's visible
col.visible = true;
col.width = width;
... After loop ...
grid.invalidateSize();
grid.invalidateDisplayList();
Edit:
Here's the info you guys requested:
The settings are saved into a database (the flex proejct is connected to JBoss). I simply save a CSV type thing with the column's name and it's width. I know this works because the one data grid that is visible when the application starts gets sized correctly.
Yes, the grids use relative sizes (ie. 100%) -- I can't really change that because I want the grid to take up all available space in its container -- and I want the user to be able to resize their browser and still have it look right.
Each grid is contained in its own Hbox
The data grids are created when the application starts -- you can only see one of them though. They are in a tab navigator type thing, but it's creation policy is set to "all" so they can be populated with data (the population takes some time, and typically the user sits on the front grid for a little while.)
I can't put my resize stuff in the creationComplete handler because I end up with the same problem. The grid's size is like 50 right after it's created (it should be like 1000, 100% of the page width) -- and then I go to set the sizes of the columns (which are obviously > 50) and the resize does nothing
A couple thoughts:
Resize during CreationComplete(): When are your datagrids being created? Can you declare a method like resizeDataGrid() when the creationComplete() event fires for the datagrid? If you are using datagrids in, say, a TabNavigator, the default creation policy is to delay component creation until the user uses the component (e.g. makes the tab active).
Fixed Sizes: Are your datagrids using a fixed size, or a relative size? Relative sizing (e.g. width='50%') of a datagrid or datagrid columns is buggy in Flex, and the best workaround is to set a pixel width of both the datagrid and the datagrid columns
Storing User Preferences: How are you storing your user preferences? Using a SharedObject to store datagrid widths is probably the best option.
Spark Containers: How are the datagrids contained? For example, do they each sit within a VGroup, or are they not contained at all? I've found that using Spark layout tools (like a VGroup) to contain your datagrids improves datagrid layout issues.
What we did was saved off the column width on initialization and then reset the widths on rerender of the grid, this will occur on the first draw of the grid and subsequent resizes.
the only problem with this was that it requires columns to be resizable but does not allow the user to resize
// saves column width - this is intended to save width percent which
// will only be available on initialization, after that I beleive widths
// will be fixed size
private function saveOffColumnWidths(columns:ArrayCollection):void
{
for each(var column:TDMSEDataGridColumn in columns)
{
originalColWidths.push(column.width);
}
}
// resets the column widths - the saved widths are assumed to be width percentages
private function resetColumnWidths():void
{
dataGrid.columns[0].width=20; // set the check col seperately
for (var pos:int=0; pos<dataGrid.columnCount-1;pos++ )
{
dataGrid.columns[pos+1].width = (dataGrid.width - 20) * originalColWidths[pos];
}
}
protected function dataGrid_renderHandler(event:Event):void
{
resetColumnWidths();
}
I have use the mx:Grid layout component to layout some form elements in a manner very similar to an HTML table. However, the result does not stretch out horizontally when you resize the app like an HTML table would. How can I make it do that?
Try setting the width and height of the Grid element to a percentage value.
I'm using a Grid on one of my main applications, and I've set the width/height to 100% and it resizes just fine.
You'll likely need to set the width and height of the rows and items (GridRow and GridItem) as well, depending on how you want the rows/columns to resize.
Edit if you're creating the Grid programmatically (e.g. in a .as file), you'll need to set these values as percentages as follows:
var grid:Grid = new Grid();
grid.percentWidth = 100;
grid.percentHeight = 100;