VS 2010 Custom Painting An MdiParent?
Jun 4, 2010
I'm tired of looking at the boring default dark gray back of an MdiParent. I tried using Juggalo's Gradient Form and realized that the MdiParent was not being painted, at all. A temporary work around was to create an Image and set it as the background. This is fine and dandy but when I bring the thing to full screen and drag around my MdiChildren forms, the application gets laggy. I have already tried setting the Form to Double Buffered and it doesn't work at all, no noticeable change.I did try editing the Form's Paint() event, but to no avail.Here's the code I'm using to create the image (practically from Juggalo's Gradient Form):
[code]...
Creates the image nice and fast. I want this to happen in the Form's Paint Event though, so I don't have to rely on an Image that causes my program to lag about.
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Dec 7, 2011
I have inherited the standard panel control to create a panel having custom border color. The problem is, while the panel is on a form and any other form is moved across it, it paints hapazard lines of the same color as the panel custom border color, all throughout background of the panel. I tried to Refresh or Invalidate the panel in its paint event but of no avail. The same is happening while designing in the design editor too. See attached image. Why is this happening and how to get rid of it? My code follows:
[Code]...
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Mar 18, 2011
I am working on a spreadsheet-like custom control, manually painting all cells according to its bounds and indexes. All is working fine until I populate it to upto a hundred rows (with fixed 6 columns). Basically my sheet expands itself to fit all cells, so to use it properly on a form, I use a panel with autoscroll = true and with my sheet inside. The problem is, the control flickers a lot, which I think is caused by painting ALL of the cells. Is there a way to paint only the visible area.?? So when I scroll down, the control would paint only the visible cells on that area. What I am thinking right now is to not put it in a container, but rather, put a scrollbar in my control. Then that scrollbar would then handle the setting of visible cells, and then my paint event would only paint that visible cells. I am using VB btw, .NET 3.5.. I cant put the code in here cause its separated in different classes(Cell, CellCollection, Rows, Columns, Range, Worksheet, etc.)
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Nov 11, 2011
I have created a custom ToolStripProgressBar. It is basically a class inherited from ToolStripStatusLabel, and i paint the 'progress' bar myself (just a simple rectangle). I have tried creating a custom ToolStripProgressBar using different methods including inheriting from both ProgressBar, ToolStripProgressBar and ToolStripControlHost. I always ran into difficulties doing in this way. Inheriting from ToolStripStatusLabel works well, but with one issue...
In order to have the progress bar update in the statusbar, i have to call StatusStrip.Refresh. Trouble is, adds a huge overhead to the drawing of the progress bar graphics. Simply calling the invalidate method of my ToolStripStatusLabel does not seem to render anything to the screen. how to have my graphics draw without calling the refresh method?
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Oct 6, 2010
I have started to work some more on my 'shape editor'. If you're not familiar with it,ust imagine the Visual Studio form designer: a 'canvas' (the form) with a bunch of 'shapes' (the controls) that can be selected, moved, resized, etc. I have just finished implementing snapping between shapes and the canvas boundaries. But now I am having some slight issues with painting the snap lines.Just FYI: this is what I mean by snap lines:The blue lines that indicate that the 'buttons' are snapped to each other, and a purple line indicating that button1 is snapped to the boundary.
My shape editor is based loosely on jmcilhinney's 'manipulating GDI+ drawings' codebank entry, and a central idea in that post is to only draw what is necessary. In other words, when I move a shape I could re-draw the entire canvas, but it is much faster and smoother to only re-draw the old and the new location of the shape. Since nothing else has changed, I don't need to draw the rest. So, I simply invalidate the old bounds and the new bounds, and even with a lot of shapes all moving simultaneously it still feels very smooth.
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Aug 13, 2010
If this has been answered elsewhere can someone point me in the right direction. Instead of having visual studio's update screen i want to have my own screen pop up within my mdiparent form and have abit on the popup where i can display the changes that have been made (i can try and work this out with text files etc.)
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Jun 21, 2011
I recently downloaded VB 2010 Express so i am quite new to the language, but i have worked with dark basic, which seems to b very similar.Anyway, my problem is that i cannot seem to correctly set out my array of a custom type/class. i am trying to create two arrays, one of available entities and another of selected entities of which the user selects the entities to be dealt with in irrelevant ways. i have creates a button (called test) which adds some entities to the available list and all the entities come back the same value but they shouldnt be as you'll c in the code. i have run the step into command a found that "available.item(#).Name = " will change all of the entity's names.As of current i am working with lists as the array kept asking for a 'new' statement but i couldnt figure out where to put it.[code]
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Aug 19, 2009
This is mis system projectcell painting in datagrid when error while calculating datai have made a datagrid with 7 columns firstly 7 r with values 0 at beginning when user enters input then in the datagrid with first 6 columns & 7 one with total i.e. total (column 7) = col1 + ...to Col7now, when the total entered by user is different from total it should match itif same then no cellpainting is done
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Sep 29, 2010
Has anyone ever noticed that when adding many rows to a datagridview the scroll bar has a problem painting and the user can no longer use it? How do I fix this?
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Dec 2, 2010
Their system executes a DB query everytime they select something, causing performance issues. So I thought that I would read the superset of data into a datatable, and then whenever they want subsets, simply run against the datatable. I've done some testing and the performance difference is HUGE.The problem is how the screen paints on postbacks. The screen will temporarily go blank then the data will appear as expected. Of course, they don't want the blanking of the screen each time they select a subset of data.
I am currently using a repeater to handle the display of data due to the nature of what they want to display. A datagrid might be a good alternative for sorting functions, but I think it would still blank the screen when it data binds.How do I go about filling the repeater without blanking the screen? Is it even p[ossible? Logically I would think not but I don't have the experience. Or perhaps I can fill a datagrid without blanking the screen on the postback?I'd rather not have to go out to the database every time, but if that's the way to go then I can live with that.
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Aug 24, 2010
I downloaded Visual Basic 2010 Express and got familiar with it over several days but the following issues are stumping me:
Where are the art instructions to be found? The ones featured in the examples are pretty basic. I've looked all over but can't find anything.
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Feb 18, 2011
I just finished creating a program where you find the area of a 5 sided polygon. But not I want to actually draw the polygon given the coordinates
Private Sub PI_Estimation_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
Dim myGraphics As Graphics
[code].....
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Oct 16, 2009
Drawing on top of a RichTextBox control has always been a pain due to the Paint event, and related OnPaint() method being suppressed. Here is a bit of code that gets around this issue.The following derived RichTextBox will use a seperate NativeWindow control to hook into the message stream of the RichTextBox, listen for the WM_PAINT message, and then raise the Paint event on the RichTextBox for you.In this way, it is possible to use the Paint event handler of the RichTextBox control to paint on top of the control after it has performed its default rendering of the text.The following code is an initial implementation but appears to be pretty solid so far. 'Based in part on code located at: [URL]
''' <summary>
''' A RichTextBox object which raises, and utilizes, its own Paint event.
''' </summary>
''' <remarks></remarks>
[Code].....
I may continue to expand upon this idea, but I wanted to get the initial code out here as this seems to be the minimum to get the painting functionality to work.Reed Kimble - "When you do things right, people won't be sure you've done anything at all"
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May 11, 2012
I have a MDIParent form that has a bunch of child forms. When I open a child form, I can actually move the form outside the bounds of the Parent. How can I prevent this? I've set each of the Child Forms "IsMdiContainer" property to "False". What am I missing?
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Jun 12, 2012
I have an MDI windows form setup. On load it sets the child form(frmMainData) and opens it.
I have a progress bar on my child form that I wish to show(set to visible = false in design)
I have menu strip on my parent form.
For simplicity I have just set the command against one of the menustrip options to do the following[code]...
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Jan 2, 2010
in the painteventargs of the form, i've got something like this: [Code] i'm getting a very cool gradient effect from red to yellow, but why is that the case? shouldn't the 1x1 portion be totally red? and the remaining pixels be totally yellow?
i'm not trying to paint a 1x1 portion in my form, im trying to know why e.Graphics.DrawImage(bm, 0, 0, 100, 100) doesn't draw a 1x1 red portion on my form through the code provided above. my understanding is that 0,0 specifies the point to draw the image. bm specifies the image actually drawn, which is 1x1 px. and 100,100 specifies the allowed space for the graphics to draw, if this is correct, the first pixel should be red and the remaining 9999 pixels should be yellow but they aren't.
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Mar 5, 2009
I'm not sure if this should be here or in the Graphics subforum. Basically, I want to simulate the monitor(s) going black (it's an immature April Fool's Day prank). My initial thought was to create a borderless form that is the size of all the monitors with a backcolor of black. Then, slowly, increase the opacity of the form. This approach works great as far as the visual effect I'm trying to achieve...the problem is that it's a form. If the form is on top - while you can *see* windows below it - you can't interact with them. I'm wondering if there is a way to create the same visual effect without using a form so that the PC will remain usable while the monitor appears to slowly be getting darker?
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Feb 18, 2011
painting only part of text in cells like my column is NAME and values are bahushekh ,bahushekh1,msdn ,abc etc for that column. Now I want to paint only bahu in Red if it exists rest part will be black
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Feb 28, 2012
I have a panel that has a BackgroundImage set to "zoom". Because of this, the image usually has some grey "letterboxing" showing the panel beneath the BackgroundImage. I want to paint on the Graphics Object of the Panel using its paint event handler. Is there a way to contrain my painting to just the image part of the panel? Is there a way to find the rectangle that the BackgroundImage is occupying within the panel?
P.S. I don't want to make a graphics object from the BackgroundImage because I'm already using that for some other "paint layers".
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Apr 28, 2010
I've never had a need minimize my application until today. But when I did, and I brought it back up, it looked... strange. Which makes me think it has something to do with a paint problem... or something.
Before:
After:
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Apr 29, 2010
I have a datagridview, wich on colum is a Combobox getting data from another table.This column it's an evaluation score mark, who permit user choose between number 1 and 10I wanna do the following:In my DGV, if the value is lower than 5, then paint this cell, and only this cell, redIf the value is uper than 5, than paint this cell green (and only this cell).That means in the DGV I will have at the same time, red and green cells.
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Nov 24, 2010
How do I paint the part pointed to?
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Sep 20, 2009
I am not doing something right! I just changed my program over to painting to a picturebox instead of the form. Anyway I want to be able to print the picturebox as big as it can on a 8.5x11 size piece of paper without streching the image!
First of all I can't even get it to print at any size... it says I have no Picturebox1.image!
Public Sub Picturebox1_Paint(ByVal sender As System.Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint, PictureBox1.Paint
g = e.Graphics
[Code].....
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Mar 31, 2009
Using a plugin architecture, i created a Form Class that holds the Mdi Form. it has menustrip, toolstrip and statusstrip.
child forms are created as class and are loaded into the Mdi Form at runtime.
using interface, i was able to execute subs and functions of a child in the Mdi Form and vice versa.
now i need to change property values.. to be exact, i need to change the enabled property of the toolstrip buttons depending on which child form is activated using the form_activated event of the child form.
the problem i now have is how to change the property of the toolstrip item in the Mdi Form.. should i be using interface on this as well by creating subs in the interface and have the Mdi Form implement this interface?
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May 24, 2012
I`m developing a desktop application using Visual Studio 2005 and a vb.net code.I`m using one MDIParent form 'frmMDI' and about 20 Child Forms. In the frmMDI there is a MainMenuStrip that contains 20 ToolStripMenuItems each one used to load a corresponding child form through this [code]So, that code is responsible to load a child form. Now what I`m facing after the loading of the child form is that the behavior of the controls of that child form is not so normal. you can`t set the cursor to the end of the text in a textbox.
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Mar 20, 2012
I have this function
Private Sub createChildForm(ByVal winForm As Form)
'Take a form and set app as its parent form
winForm.MdiParent = Me
winForm.Show()
End Sub
When some one wants to view the "About" form, it's called like this:
createChildForm(New f_about)
But my function doesn't stop them from creating an unlimited number of about windows and I need to put that limit to one form.
For example, I will have a login screen, but I don't want them logging in over and over again in different accounts because my subroutine doesn't stop a form from being created/opened more than once.
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Dec 7, 2010
How run a program inside a MdiParent?
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Aug 22, 2009
Has anyone had any luck with having different window states with multiple open child forms?for example if you have a single child form opened and say it is maximized.then open a second child form as normal, the first form will then be set to normal.all the open child forms will mimic the newly opened forms state.and i believe they will mimic when making some changes to one forms state.the others will follow.i have not had luck keeping this from happening in most situations.
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Dec 14, 2010
having different window states with multiple open child forms? for example if you have a single child form opened and say it is maximized. then open a second child form as normal, the first form will then be set to normal. all the open child forms will mimic the newly opened forms state. and i believe they will mimic when making some changes to one forms state. the others will follow.
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Jan 12, 2012
When i try to view MDIParent screen in designer mode I'm getting below exception...
`Could not find endpoint element with name 'NetTcpBinding_IMyService' and contract 'ClientProxy.IMyService' in the ServiceModel client configuration section. This might be because no configuration file was found for your application, or because no endpoint element matching this name could be found in the client element.'
Little background to understand my question more clearly...
I've a WCF server which I'm trying to consume in my Winform application. So i've created a separate class library in which i added service reference and created a proxy. I've copied the client endpoint info from app.config in class library to UI app.config file.
When i run the application everything is working fine but when i try to open MDIParent screen in designer mode its throwing above exception.
Note: I think i'm getting error because i'm trying to create a proxy object on NEW method (form constractor) if i comment that line - i'm able to view designer screen.
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