C# :: Custom Dialog Resizer With Aspect Lock CheckBox
Jan 20, 2015
I am working on a paint program (already quite well developed) and I have a 'Resize' option in my Menu. When pressed it activates a custom dialog for resizing the image with 2 numeric up/downs to adjust width and height. It all works perfectly. But I want to include an 'Aspect Lock' checkBox like a professional program would have. It should immediately change both values as you adjust either one.
Here's where I am totally stumped! Of course I have tried and tried various codes, but nothing works properly. My values jump erratically or won't change at all. I wonder if trying to change the value of one numeric up/down while inside the code block for changing the value of the other one has got them screwing with each other somehow. Any example code that could accomplish what I'm trying to do?
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Dec 15, 2014
When I try to resize my form, every time i try to resize it while running, the window blinks between original size and the new size it was given, when i release the mouse it either stay in its new size or shrinks back to its original size, What makes it return to its original size, maybe its something with the form_Resize function..
private bool inForm_Resize = false;
private Size PrevSize;
private void Form1_Resize(object sender, EventArgs e) {
double dRatio = 1.6;
if (!inForm_Resize) {
inForm_Resize = true;
[Code] ....
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Apr 24, 2014
I cannot check the checkbox in my datagridview.
Here is my code.
First, I added a checkbox column.
private void addCheckBoxColumn() {
DataGridViewCheckBoxColumn checkColumn = new DataGridViewCheckBoxColumn();
checkColumn.Name = "clmCheck";
checkColumn.HeaderText = "";
checkColumn.Width = 100;
checkColumn.ReadOnly = false;
dgv1.Columns.Add(checkC
[Code] ....
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May 3, 2014
Ok so I'm working with a windows form in C# and sql server database. I'm trying to do something like what is in the image below using a datagridview. My question is how do I 1) ensure only 1 checkbox is checked per row 2) do math that 'links' a checkbox column with another column, and add the totals. I understand that asp.net and web forms would be easier but we have not reached that point in the course yet. Would this be on the right track:
foreach (DataGridViewRow row in dataGridView.Rows)
{
if ((bool)(row.Cells["Checkbox"]).Value || (CheckState)row.Cells["Checkbox"].Value == CheckState.Checked)
{
// Do something
}
}
Attached image(s)
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Sep 14, 2014
I'm using winforms and I want to set a checkbox on a dropdown menu item, but I don't know how to access the dropdown menu items.
I know ToolStripMenuItem items are attached to ContextMenuStrip items but I'm not sure how to navigate into the ToolStripMenuItem section to read/set those menu items.
ToolStripMenuItem listbox_font_size;
cmsListBox = new ContextMenuStrip();
cmsListBox.Items.Clear();
[Code].....
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Mar 16, 2014
Im trying to Uncheck a Checkbox control with following code.
Code:
else if((point.x >= (rcRememPass.left - 4) && point.x <= rcRememPass.right) && (point.y >= rcRememPass.top && point.y <= rcRememPass.bottom))
{
if(m_CheckBoxRemem.GetState() == BST_CHECKED)
m_CheckBoxRemem.SetCheck(0);
else
m_CheckBoxRemem.SetCheck(1);
}
Above code snippet is from OnLButtonUp(). Whereas else part working good why the if part is failing to uncheck the box ?.
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Feb 24, 2013
It is my first time in use lock detect so i didn't now how to start.
how to define the lock detect?
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Oct 17, 2013
I'm trying to find a way to call a variable checkbox.
i.e.
for (i = 10; i < 20; i++) {
Checkbox[i]->Caption = Some Database Information
};
Note: Checkboxes are all called Checkbox10 ~ Checkbox19
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Feb 17, 2013
I want to send messege to click select check box. I can click button but I don't know how to select check box with VC.
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Aug 30, 2014
For a larger program I need a way to tell if a "lock knob" is going clockwise or counterclockwise. So below, I have my MoveLock function (That our teacher actually gave us to use) that reads inputs from the arrow keys and displays them. But what I need is to be able to count each time its moved in the correct direction and to reset the count it if it has gone in the other. Right now I'm just testing if it's going clockwise. I thought to solve this by resetting the count if it was less than the returned value from MoveLock (which is a count to compare to the former). Currently, it only displays the current position and the count as -1 or 1.
#include <iostream>
#include <windows.h>
#include <iomanip>
using namespace std;
HANDLE inKeys = GetStdHandle(STD_INPUT_HANDLE);
HANDLE screen = GetStdHandle(STD_OUTPUT_HANDLE);
[code]....
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Apr 21, 2014
I know how to make the invisible Form, but the things that I put on the Form becomes invisible while debugging...
I need to get invisible form with visible button / radioButton / Checkbox in the middle of the screen...
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Jul 11, 2014
I was trying to put mutex lock on shared memory but my code is not working. What I want is that if some process is putting something on shared memory segment, other process should not be able to access that segment. For testing , I create a server program which put data in shared memory and client program which access the data.
To test it, I put break point after:
pthread_mutex_lock(&(init_lock));
But I see that client program was able to access shared memory.
Below is code:
Server: Code: pthread_mutex_t init_lock = PTHREAD_MUTEX_INITIALIZER;
main()
{
char c;
[Code].....
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Mar 6, 2015
Auto lock screen coding for windows phone 8.1.
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Mar 25, 2014
Consider how to implement a mutex lock using an atomic hardware instruction. Assume that the following structure defining the mutex lock is available:
Code:
typedef struct {
int available;
}
lock; (available == 0)
indicates that the lock is available, and a value of 1 indicates that the lock is unavailable. Using this struct, illustrate how the following functions can be implemented using the test and set() and compare and swap() instructions:
void acquire(lock *mutex)
void release(lock *mutex)
Be sure to include any initialization that may be necessary.
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Aug 31, 2014
I am trying to compare performance of different lock-free queues, therefore, I want to create a stress test - which includes pushing/popping user-defined pre-built objects to and from the queue. My question is how can perform the stress test with pushing and popping objects instead of pointers to object like I have done in my code. What is the different in terms of performance of pushing/popping objects Vs. pushing/popping pointers.
#include <cstdlib>
#include <stdio.h>
#include <string>
[Code]....
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Jun 26, 2012
I have a event called dataTree_AfterSelect in which I have some code which I want to execute as atomic operation like this:
protected void dataTree_AfterSelect(event params)
{
code that should not be disturbed
}
What is happening now is, I am able to select another node of tree & in that case another execution of above function starts causing a garbled result.
What I want is, user should be able to click on tree node but execution of code block should only start after first execution is totally over.
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Mar 25, 2013
I m trying to lock a single skeleton using Microsoft Kinect SDK v 1.7 . My requirements are
•First lock a single skeleton.
•Check the tracking state of the of the locked skeleton.
•If the tracking state of the locked skeleton is NOT Tracked,then
• ----->check for the next closest skeleton
•----->lock this skeleton.
How do I do this using vc++2010. The code which i tried is given below.
Code:
TrackSingleSkeleton(NUI_SKELETON_FRAME* pSkeletonFrame) {
DWORD dwTrackingIDs[NUI_SKELETON_MAX_TRACKED_COUNT]={0, 0};
m_pNuiSensor->NuiSkeletonTrackingEnable(m_hNextSkeletonEvent,NUI_SKELETON_TRACKING_FLAG_TITLE_SETS_TRACKED_SKELETONS);
[Code]....
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Feb 7, 2014
I'm trying to write a custom allocator that I can use with the STL. Here's what I have so far :
Code:
#include <cstddef>
#include <iostream>
#include <memory>
#include <vector>
template<class T>
struct customallocator {
[Code].....
I'm doing and currently, my push_back doesn't seem to do anything.
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Oct 9, 2014
Let's say we have a custom Vector class and I need to know which of the following is considered to be more efficient and why of course.
Vector Vector::operator+(const Vector &b) const {
return Vector(x+b.x,y+b.y);
}
Vector Vector::operator+(const Vector &b) const {
Vector tmp(x+b.x,y+b.y);
return tmp;
}
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Oct 8, 2013
I've written a doubly linked list per my assignment instructions. I've implemented begin() and end() iterators for it, and they work with no problems when traversing the list. However, I need to sort the elements in the list. We are allowed to use the sort function defined in the <algorithm> header since we haven't yet covered sorting algorithms.
But, I'm running into a ton of problems. I figured as long as the begin() and end() iterators were defined for the list, then sort(list.begin(), list.end(), compare) would do the trick. The main errors I'm getting are:
error: no type named iterator_category
error: no type named value_type
error: no type named difference_type
error: no type named pointer
error: no type named reference
And also errors for no match of the + and - operators for the iterator class.
I understand reference, pointer, and value_type, but I have no idea about iterator_category and difference_type. Additionally, I'm a little unsure why the + and - operators need to be overloaded.
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Jul 13, 2014
I have a POPUP
MAIN_MENU MENU {
POPUP "&Manager" {
MENUITEM "New Royal Python", MENU_NEW_ROYAL_PYTHON
POPUP "&Select Python" {
}
}
}
I basically want to give the POPUP an ID so I can talk with it but it does not seem to be accepting a second parameter. Once I have done that I need to send a message to it to ask it to add a new item, what are the messages I need to send for this?
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May 21, 2013
I am making a level editor that needs to output a custom map file for use with source code that I will write for a graphics library.
My question is: What do I need to bear in mind when deciding how to structure a custom file type? Also how can I encode a standard bitmap image into my file (the tile set) so that it can all be contained in a single file rather two files; the map file and tile set (.bmp file).
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Nov 30, 2014
I have begun switching from WinForms to WPF and I'm having a hard time understanding the new concepts. In WinForms, I had a few User Controls, custom drawn using shapes (rectangles, ellipses, etc). They had some unique properties, like "Flashing" (setting this property to True and setting the "Flash Interval" property to 500 would have resulted in the control changing its background color to white and back again, every 0.5 seconds), "Beeping", etc.
I have tried to replicate these controls in WPF/XAML and so far managed to draw the shape. However, when it came to implementing a custom property that would redraw the background color of the rectangle every interval set by user in another property, i got stuck. The property is being set, but it doesn't change the background color. Alternatively, i have tried this method, with the same results (i got it to show in the "Properties" window in Visual Studio, i can set it, it is being stored in XAML, but it doesn't affect the background.
C# code behind:
public struct LCARSColors
{
public static Brush DarkBlue = (Brush)(new BrushConverter().ConvertFrom("#FF3366CC"));
public static Brush LightBlue = (Brush)(new BrushConverter().ConvertFrom("#FF99CCFF"));
public static Brush Pink = (Brush)(new BrushConverter().ConvertFrom("#FFCC99CC"));
[Code] ....
If i use this line (commented in this code sample):
<!--<SolidColorBrush x:Name="MySolidColorBrush" Color="{DynamicResource DarkBlue}" />-->
The background is colored in DarkBlue (as defined). But if i use this line:
<SolidColorBrush x:Name="MySolidColorBrush" Color="{Binding BackgroundColor, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}" />
Nothing happens, the rectangle disappears entirely. If i add this to the above line:
FallbackValue=LightYellow
The rectangle is colored in LightYellow, meaning that the property is not accepted and the fallback value is used. Why?
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Jul 12, 2014
I've done some research and found that people use Mah metro, though I don't want to use that because I want to make a GUI that is fully mine, so I can do what ever I want to customize it to my liking.
I don't know how to get this done in WinForms....
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May 26, 2014
I was going through tutorial in WPF on customs Cursor, While Running the application i am getting an exception XamlParseException was unhandled, here the code
public partial class MainWindow : Window
{
public MainWindow()
{
[Code].....
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Sep 23, 2014
I have been trying to make a custom control(list box with more features). I know how to setup custom properties, but how do I make it so that the property can be edited in a separate window ?
I think I figured out how to show the form itself, and I don't know how to make the [...] button like :
There's not much Custom Control tutorials out there, and that's really the problem here.
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