8 Bit GIF - Transparency / Forms And Controls
Apr 3, 2012
I have a 8 bit Gif, that is transparent, with controls sitting on top of it, all in a custom control. This part works fine. However, This control is a menu ring (appears around another control with a few options). The transparent part is over a Picbox, that is in a panel. The transparent part of the image seems to skip the picbox and go right through to the panel. I set the panel to a back color of RED. The custom control when its placed instead of showing the image in the pic box that it is on top of, it shows the RED panel I have made sure all my Z orders are right.
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Jun 16, 2012
i know there is an option for the whole form to be transparent but each control?
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Oct 11, 2010
I need transparent panels. I simply set that background color of controls to Transparent - this does not solve the problem, as the transparency simply shows the background color of the form, but does NOT show any controls placed on the form, which is the crux of my problem.Why? Because I'm trying to use this skinning example, which does the skin by creating a user control, and make the panels show the skin's background:[URL] It seems I'm going to have to override the panel and paint it's background manually, but I don't understand how it all works; I've created a new class and overridden the panel, but the painting stuff is way above my head.
In the form's class:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'Panel1.BackColor = Color.FromArgb(0, 0, 0, 0)
'supposedly a trick to make a gradient background on the form
[code]....
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May 4, 2011
I'm trying to make a label transparent. When I set the BackColor to transparent, all it does it take the color of the form it's sitting on, i.e. It's not truly transparent. I've googled it and found this in another thread (from a MSFT MVP)".NET controls do not support true transparency. You can set their BackColor to Transparent (in some but not all cases) and the parent control will show through, but only the parent control. If there is some other control behind that is not the parent it will not show through. That's because the control is not truly transparent. It basically copies its parent in the area behind it and uses that as its background, but that doesn't include sibling controls that may be behind it as well." To me, this is completely unacceptable. Why even include the transparency option when all it does is set the control's backcolor to the form color? I'm trying to add a label over a progress bar to give my user some feedback (because the Visual Studio progress bar doesn't support text, which is also a horrible design shortfall by the way), and have yet to find a way around this.
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Feb 7, 2010
Ive been on the same thing for the past seven hours now. Im trying to ether get the MDI child form title-bar-less in maximized mode, or now, get the transparency working to where the MDI child has transparency. ) This is for a home automation system im working on. major alpha stages. Hardware control works ;) but this stupid GUI is kicking my butt. So three options i have. In maximize mode on the MDI child remove the title bar, or remove the parents scroll bar so i can make the MDI child the size of the parents MDI window, or make the MDI child transparency work. Im posting a screen shot to show you what im talking about.
[Code]...
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Mar 30, 2011
I am trying to make the transparency of forms change in someway. I tried making a track bar with checked boxes and that didn't work, and I tried the ALT with the UP and DOWN keys,I tried to change the code so it would fit in with my program and that didn't work ether.
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Oct 29, 2009
i know how to make a picturebox have a transparent image within it, and i know how to make forms transparent, but what i cant seem to figure out is how to add an image which has transparent parts to a completely transparent form and have it still look nice. you know when you find images which look really good by them selves, but then look really bad when moved to a different background cause they still have the white border (or any other colour border). is there ANY way which i can accomplish removing this border? its almost like the alpha channel that removes the ugly border, when putting the image on the form, is forgotten about and the colour of the forms background fills in the gap..
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Jan 16, 2011
Noticed that in my MDI Application, all my child forms lose the transparency of the border that Aero provides. Is there a way to "force" them to inherit the styling or is there a property i've overlooked to allow this?
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Oct 23, 2010
I use a lot of picture box, label, and custom controls, all of which are oddly-shaped, and must overlap. In almost all cases, the backgrounds are not solid colored.I am using transparent .png images for the background images of many of these controls (except labels), and using transparent as the backcolor, creating a custom shaped control. However, when these controls overlap, the one towards the front will not show any controls behind it through the "transparent" background. This is getting annoying, because I cannot use any alternate object arrangements.How do I create true custom-shaped forms?
P.S. Some of my controls have extremely irregular shapes, so using simple line and curve drawing functions is probably not an option.
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Aug 18, 2010
I created a background image for the form with rounded corners. I filled the outer edges and empty space with Lime color (00FF00) and then set the same transparency key in the properties for my form. It worked well, the edges were transparent and the form appeared round-edged. This was accomplished with Visual Studio .NET 2005 on Microsoft Windows Vista Home Premium 64-bit.The very same application was ported to a different platform. Visual Studio .NET 2005 on Microsoft Windows XP Professional 32-bit. All the settings are the same and nothing has been changed. But the transparency effect is not appearing on the Windows XP platform.
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Sep 17, 2010
I have a query about dynamically added controls to a form. I have a series of buttons which are created and added at run time. I have a two drop down lists and two buttons which are created at design time. Button 1 creates a series of buttons called "Test 1.x" based upon the selection of the two drop down lists. This works fine and am happy with the logic.However.... Button two should remove all the dynamically created buttons from the form.This does not happen. What does happen is that 50% of the buttons are removed starting with the first one. WHen checking the loop it only enters the loop half the amount of times that there are buttons. Very strange. When the loop is run repeatability it will remove all controls. Why will my logic not remove all the dynamically created controls at once? What is wrong with my logic?
I attach two code snippets and the .net file for your consideration.Button method which creates the dynamically created buttons from the two drop down lists and adds to form
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim Count As Integer
Dim MaxHours As Integer
[code]....
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Dec 10, 2006
I would like to know how do .net developers manage a large window application with a large number of controls, such as textbox , button, groupbox? I have seen a number of people do it this way : declare the controls as an array and initialize them one by one at run time . In this way it is easy to manage those controls because they can be accessed by array index; but this solution seems to require very good understanding of control's attribute such as its location, font etc. This could be a difficult task if the project is passed on to a less experienced developer and add changes to it.How do you deal with it?
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Jul 7, 2011
I am developping a VB.net application. I would like to add buttons on the MDI but every time I open a child form of the MDI, it appears down the buttons. Is there any way I can solve this problem?
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May 8, 2010
I am trying to build a NOTEPAD/WORDPAD like application with vb.net on visual studio 2008.
I need an option to define and choose (MsWord, or CSS like) paragraphs styles, such as: "heading1", "green quotes", etc.
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May 30, 2009
How to increase a forms opacity without increasing the opacity of the controls in the form?
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Jan 9, 2012
For some reason now, when I start a new project in Visual Basic 2008, I can no longer add any new controls to the forms. All controls are grayed out in the toolbox. What can I check to see what's causing this?
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Mar 19, 2010
I'm creating a reporting application, and our customers are going to need to generate some pretty big reports which require quite a bit of memory. Ive been in a re-factoring mood lately, so I was wondering what the best way to access the properties of another open form would be(The reporting viewer opens in a new form.) So far I have:
Dim form As MainSelections
form = My.Application.OpenForms(2)
yay or nay.
*Edit - I should probably mention that what I need is a label, two date time pickers, 5 datagridviews and a few datasets. Those cotrols have the info I use for my parameters
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Sep 4, 2010
I have a thread running on a child form, I want to activate a control on the parent form but cannot. It works fine if It's done from the child forms UI thread:
(FormMain.SetControlPropertyValue(FormMain.RBSQL2005, "Checked", True))
but not from a thread running on the child form:
Public Class FormRestoreDB
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim t = New Thread(AddressOf UpdateListView1)
[code]....
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Jul 2, 2009
If I load a datatable, and then set a listbox properties pointing to it, I get the right data, e.g.:
[code]...
I get System.Data.DataRowView instead of my actual data.I don't understand how the databinding is actual happening, and how I refresh my the data in the control when the data changes.
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Feb 12, 2011
we all know how to dock or anchor controls so that they resize themselves accordingly when a form is resized. It works fine till we have rows of controls on left and right size of the form. But what if have three columns (Columns as in visual sense. I'm not talking about any column control containing other controls) of controls? For example a form having a bunch of controls in the left side, a bunch in the middle and a bunch in the right. There may be a few more bunches in the middle. Now while resizing the form, I want the controls to resize accordingly as well as change their positions to make space for the previous bunch of controls that are resizing.
I mean, while the user increases the form size horizontally, the controls of the second bunch should resize and at the same time they should move right because the controls of the first bunch are increasing horizontally too. When the user decreases the form size horizontally the same thing should occur in the reverse order. I can manage it somehow using nested split-containers but that's too cumbersome. I would like to know if there's some better way to achieve it, like setting some property etc.?
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May 17, 2010
I have a simple UI form with some controls (textboxes, checkboxes, datagridviews etc.)
The form communicates with an object that contains the values that should be displayed in the controls.
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Feb 24, 2010
I am trying to group various controls (of the same type, e.g., labels together, buttons together, etc.) on a form using a tag or a name of some sort so I can identify all those that belong to tag 'A' and those in tag 'B'. In the end I will have on a form a number of labels grouped as tag 'A' and some labels as tag 'B' so I can change their visible properties on/off.
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Sep 1, 2009
im am working on a form with a few textboxes and buttons, the problem is when the form is resized or maximized the controls stay small. If someone could please show me how to resize the controls as the form is being resized.
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Jul 4, 2009
is there any way that i can set the property of a control all at once? like for every button, i want their backcolor to be red. something like that.also is it advisable to set the properties of a control in design view rather than code it? does it have any performance issues?
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Mar 31, 2009
I tried rewriting one of my old VB6 projects today. I keep getting stuck. I know that default instancing from VB6 is pretty much gone in VB.net. I have several forms and modules. One form is nothing but a form with a progress bar. When there is certain workload that particular form shows up and displays activity (via progress bar) and then is closes until there is more relevant workload in the app. In VB6, with several of my sub-routines (in my modules) I was able to control the progress bar value by simply referencing it this way: WorkForm.ProgressBar1.Value = (value goes here). This does not work in VB.net since WorkForm itself and any controls on it are considered private. I have tried creating instances of the "WorkForm" via "Dim wForm as New WorkForm", but even then "wForm.ProgressBar1.Value" does not work and I keep getting "'wForm.progressBar1' is not accessible in this context because it is 'Private'."
In fact when I try accessing any control on any form from my various sub-routines all I get is: "is not accessible in this context because it is 'Private'"By the way, is it just me, but after a few days working with .NET framework I realized that it seems pretty web-centric. It seems the whole idea of .NET is to push the apps from the desktop onto the web. I mean, if I rewrote my app to use only a single form up front, I wouldn't be having these problems. But then again, it wouldn't be a desktop app, it would be an app that could be easily embedded into a webpage. Is this the general idea? I am definitely not rewriting my app so it uses only one form. This is a desktop app and multiple forms are necessary.
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Dec 14, 2009
Does anybody use the Tag property of controls & forms? If so, what for?
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Oct 28, 2009
I have setup some base forms with some bottons on it The buttons are situated in a panel.Both the panel and the buttons modifer properties have been set up as "Friend".The problem I have is when I inherit these base forms, the buttons seem to jump around by themselves allot
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Aug 8, 2011
VB.Net Windows forms feature controls that are often dragged from the toolbox onto the form. The code for the control goes right into the form. Usually this is great, but is it possible to write the code for a UI control (like a panel) into a separate file which can then be imported or otherwise included into the main Form Class?
Context (a.k.a. long version): I have a form with an unchanging column of navigation buttons on the left hand side. The rest of the form is taken up by different panels, which in turn have different controls of their own. Clicking the different buttons on the left should cause these different panels to appear (clicking button "A" brings up panel "A"; button "B" brings up panel "B", etc.), but the left-hand menu should stay unchanged.
I'm having a hard time implementing this design in an elegant way in VB.Net. If I make each panel a separate Form, I have to duplicate the code that builds the unchanging left-hand menu in every file, which is terrible. I tried using inherited forms so the separate panels would inherit the left-hand menu from a master form, but that means each click on the menu sprouts the new form in a new window, and although the left-hand menu is inherited, the menu that I clicked and the identical-looking menu in the new window are not the same objects in memory and have no knowledge of each other.
I just want one window with central content that changes based on what you click on the left-hand side. A solution to this would be for the panels to be just that - panels - and not separate forms as I'm currently doing it. But this gets messy organizationally because the code for all of the panels has to be in the one massive master file. Hence the short form of my question (see above): How can I code a panel in a separate file and then bring it into the fold of the main form?
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Jan 1, 2011
I'm just starting out using vb.net and i am writing my first application. I have added some comboboxes at runtime to my form using the code below.[code]Now my question is now that i have these controls added to the form, how can i iterate through them all and collect the values for sql injection. I have given each combobox a specific name when it was created such as Ball1, Ball2, Ball3.[code]
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May 9, 2010
1. What determines that some controls cannot be added to the form? (I tried several, not all of them)
2. Where does the image for Column 1 About form come from?
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