I have a listctrl with CheckBox in it(LVS_EX_CHECKBOXES) .It is a single column List Control . My Problem is when I Click on the CheckBox the particular item is getting selected/UnSelected. But when I click on the Item text the corresponding Checkbox is not getting Selected/UnSelected . How to handle both the Scenarios.
To check the item when the user clicks on the item text, you'll have to handle the NM_CLICK message, which is sent whenever the user clicks on the item.
Something along the lines of:
CYourListCtrl::OnNMClick(NMHDR* pNMHDR, LRESULT* pResult)
{
LPNMITEMACTIVATE pNMItemActivate = reinterpret_cast<LPNMITEMACTIVATE>(pNMHDR);
int nItemIndex = pNMItemActivate->iItem;
BOOL bCurrentCheckState = GetCheck(nItemIndex);
SetCheck(nItemIndex, !bCurrentCheckState);
*pResult = 0;
}
I'm writing this without testing though, so you'll have to make sure that it doesn't conflict with the handler for clicks on the check box iteself.
Related
I have a window which has a CTreeCtrl. A user can right-click any element and display a context menu. From there they can choose to delete the entry. Something like this:
Here is a snippet of the context menu item handler:
void CAssignHistoryDlg::OnDeleteFromAssignmentHistory()
{
CString strINI = theApp.GetAssignHistoryPath();
HTREEITEM hItem = m_treeHistory.GetSelectedItem();
CString strName, strDeletedName, strEntry;
if (m_treeHistory.GetParentItem(hItem) != nullptr)
{
// The user has picked one of the history dates.
// So the parent should be the actual name.
hItem = m_treeHistory.GetParentItem(hItem);
// Now OK to proceed
}
strName = ExtractName(hItem);
GetParent()->EnableWindow(FALSE);
strEntry.Format(IDS_TPL_SURE_DELETE_FROM_ASSIGN_HIST, strName);
if (AfxMessageBox(strEntry, MB_YESNO | MB_ICONQUESTION) == IDNO)
{
The image shows my problem. If I first click on Test, so that it is selected and bright blue and then right-click, it shows Test in the popup message. This is fine. But ...
If the first name is initially selected, and I go ahead and directly right-click Test, even though it seems to go blue (as if selected), m_treeHistory.GetSelectedItem() is returning the original, first name. I think I am describing it not very well.
In short, I want to guarantee that I get the HTREEITEM for the item that the user right-clicked on. What I have is not 100% fool-proof.
If it helps, this is how I display the context menu:
void CAssignHistoryDlg::OnNMRclickTreeHistory(NMHDR *pNMHDR, LRESULT *pResult)
{
CMenu mnuContext, *pMnuEdit = nullptr;
CPoint ptLocal;
LPNMTREEVIEW pNMTreeView = reinterpret_cast<LPNMTREEVIEW>(pNMHDR);
GetCursorPos(&ptLocal);
mnuContext.LoadMenu( IDR_MENU_SM_ASSIGN_HIST_POPUP );
pMnuEdit = mnuContext.GetSubMenu( 0 );
if (pMnuEdit != nullptr)
{
pMnuEdit->TrackPopupMenu( TPM_LEFTALIGN|TPM_LEFTBUTTON,
ptLocal.x, ptLocal.y, this, nullptr );
}
*pResult = 0;
}
So to recap, at the moment the user must physically left click on a item in the tree to select it. Then they can right-click and it will offer to delete this person. But if they go ahead and just right-click on anyone, it will not offer to delete THAT person.
You can get the actual tree item at any given point using the HitTest() member of the CTreeCtrl class. Exactly how and where you do this will depend on your code design but, if you have a pointer to your CTreeCtrl (pwTree in the code below), then you can do something like this:
CPoint ptLocal;
GetCursorPos(&ptLocal);
pWTree->ScreenToClient(&ptLocal); // May not be required in certain handlers?
HTREEITEM hItem = pWTree->HitTest(ptLocal); // Remember to check for NULL return!
You can then either use the returned hItem directly, or use it to explicitly set the tree's selection (to that item), before doing any further processing.
The MS doc: https://learn.microsoft.com/en-us/cpp/mfc/reference/cwnd-class?view=vs-2019 doesn't have a "click" handler, it has CWnd::OnRButtonDblClk, CWnd::OnRButtonDown and CWnd::OnRButtonUp. Which one are you handling?
The reason for your defect might be that you don't let the tree control handle that right button event (to select that new item).
I would suggest to use CWnd::OnContextMenu instead.
I would like to calculate the visibility of a button based upon the content of a text area field (multi line edit box). it should contain at least some text.
I could use the onkeypress event (server) and perform a partial refresh on the button BUT I notice that the partial refresh spinner appears then when users are writing in the field. I would like to avoid this.
What options do I have?
You would be best off writing a client side script for that event. This script should show the button when there are more than 200 characters in the textarea. You will need to set the style visibility to hidden for the button initially. If the form can be edited multiple times, you will need to write this as a function and call it on page load as well as in the keypress event.
If you can use the keyup event instead of keypress, this may be better.
var textareaID = '#{id:textareaID}';
var buttonID = '#{id:buttonID}';
var textareaValue = document.getElementById(textareaID).value;
var visibility;
if (textareaValue.length > 200) {
visibility = 'visible';
}
else
{
visibility = 'hidden';
}
document.getElementById(buttonID).style.visibility=visibility;
In MFC how to remove a menu-item of POPUP type. RemoveMenu() either take ID or position. Since, there is no ID for POPUP menu, option left is by using position.
But I am not getting how and where I can call RemoveMenu().
File Edit Test
Test_submenu_1
Test_submenu_2
Test_submenu_3 > submenu_3_item_1
Test_submenu_4
Test_submenu_5
I want to remove Test_submenu_3? I am not getting how do find CMenu object for Test so that I can call RemoveMenu() by passing position "2" for submenu_3_item_1.
Any suggestion for doing this will be greatly appreciated.
Thanks!
You cannot use LoadMenu, since this function does just that.
After modifying loaded menu it is killed when menu object used to load it goes out of scope. You have to modify menu that is currently used.
Your menu is a popup part of the main menu, second in position. It contains 5 items and second one is another popup. To my understanding, you want to remove this item and popup of this item.
To make it work you will have to ask main window for the current menu:
CMenu* pMenu = GetMenu(); // get the main menu
CMenu* pPopupMenu = pMenu->GetSubMenu(2);//(Test menu with item....)
pPopupMenu->RemoveMenu(2, MF_BYPOSITION);
Of course, this code is from the main frame. If you want to use it elsewhere, you will have to access all using pointer to the main frame.
Try the below. You get the Test sub-menu first (index 2), then once you have that you tell it to remove its Test_submenu_3 submenu by position (also 2).
CMenu topMenu;
topMenu.LoadMenu(IDR_YOUR_MENU);
CMenu& testSubMenu = *topMenu.GetSubMenu(2);
testSubMenu.RemoveMenu(2,MF_BYPOSITION);
'Test' is the 3rd menu item (by position) on the top level menu. It's just been rendered horizontally rather than vertically. Assuming you have a handle to the top level menu use the same code you'd use to the get the sub menus as you would to get the 'Test' menu.
You can use this below code to remove the submenu, by comparing name
bool RemoveSubmenu(CMenu * pMenu) {
for (int pos = 0; pos < pMenu->GetMenuItemCount(); pos++) {
wchar_t *name = new wchar_t[mf.cch + 1];
MENUITEMINFO mf;
ZeroMemory(&mf, sizeof(mf));
mf.cbSize = sizeof(mf);
mf.fMask = MIIM_SUBMENU | MIIM_FTYPE | MIIM_STRING;
mf.fType = MIIM_STRING;
mf.dwTypeData = NULL;
if (!GetMenuItemInfo(pMenu->m_hMenu, pos, TRUE, &mf))
break;
if (mf.hSubMenu != NULL){
mf.fMask = MIIM_TYPE;
mf.fType = MFT_STRING;
++mf.cch;
mf.dwTypeData = (LPSTR)name;
if (!GetMenuItemInfo(pMenu->m_hMenu, pos, TRUE, &mf)){
bRet = false;
break;
}
//
// compare sub menu name (i.e mf.dwTypeData) here, do the required
// modifications
//
pMenu->RemoveMenu(pos, MF_BYPOSITION);
bRet = true;
break;
}
}
}
I have created a Sharepoint WebPart, and I have given it a custom ToolPart that includes a Grid (a Telerik RadGrid, to be exact, though that is rather irrelevant). I have populated the grid, and created a GridButtonColumn object to add to the grid:
protected override void CreateChildControls()
{
GridButtonColumn c = new GridButtonColumn();
c.ConfirmText = "Really Delete?";
c.ConfirmDialogType = GridConfirmDialogType.RadWindow;
c.ConfirmTitle = "Delete";
c.ButtonType = GridButtonColumnType.LinkButton;
c.Text = "Delete";
c.UniqueName = "DeleteColumn";
grid.Columns.Add(c);
// ...
grid.DeleteCommand += new GridCommandEventHandler(Grid_DeleteCommand);
}
The grid renders correctly - populated with data and with the delete button present.
Now, when I click any of the delete button, the Grid_DeleteCommand() event does not get triggered. However, when I add a random button outside of the grid, it's click event gets triggered:
Button b = new Button();
b.Text = "Hello World";
b.Click += new EventHandler(Button_Click);
I'm not able to debug on this installation of Sharepoint (or maybe I can, but attaching to the process hasn't allowed me to do so yet), so the method of both of those events is simply a redirection to Google. That is how I check to see if the events fire:
string AbsoluteUri ="http://www.google.com";
Page.Response.Redirect(AbsoluteUri);
The only difference I can see between the two is that, with the 'Delete' button, it is nested inside of a Grid control, whereas with the 'Hello World' button, there is no nesting.
How would I be able to have the Grid_DeleteCommand fire when I click the button in the grid?
Using the Telerik Grid control, you should specify button's CommandName in your code.
Adding this line should solve the problem:
c.CommandName = "Delete";
I was wondering if it was possible to replace one control in a TableLayoutPanel with another at runtime. I have a combo box and a button which are dynamically added to the TableLayoutPanel at runtime, and when the user selects an item in the combo box and hits the button, I'd like to replace the combobox with a label containing the text of the selected combo box item.
Basically, if I could simply remove the control and insert another at it's index, that would work for me. However I don't see an option like "splice" or "insert" on the Controls collection of the TableLayoutPanel, and I was wondering if there was a simple way to insert a control at a specific index. Thanks in advance.
Fixed this by populating a panel with the two controls I wanted to swap and putting that into the TableLayoutPanel. Then I set their visibility according to which I wanted to see at what time.
This is what I've been able to come up with for what I needed. It gets the position of the ComboBox and makes a new label using the selected value.
// Replaces a drop down menu with a label of the same value
private void lockDropMenu(ComboBox dropControl)
{
TableLayoutPanelCellPosition pos = myTable.GetCellPosition(dropControl);
Label lblValue = new Label();
myTable.Controls.Remove(dropControl);
if (dropControl.SelectedItem != null)
{
lblValue.Text = dropControl.SelectedItem.ToString();
lblValue.Font = lblValue.Font = dropControl.Font;
// Just my preferred formatting
lblValue.AutoSize = true;
lblValue.Dock = System.Windows.Forms.DockStyle.Fill;
lblValue.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
myTable.Controls.Add(lblValue, pos.Column, pos.Row);
}
}