I have a resizeable CListCtrl and I want to avoid any item being displayed partially, ever.
For example:
I want Item 9 to not be displayed in this case. Is there a flag or method for this? How would you go about solving this issue?
I tried the following and it was no good:
void CMyCListCtrl::OnEndScrolling()
{
int iCount = this->GetCountPerPage();
EnsureVisible(iCount - 1, FALSE);
}
after catching
...
ON_NOTIFY( LVN_ENDSCROLL, IDC_LIST1, OnEndScroll )
...
void CWheelTestDlg::OnEndScroll(NMHDR* pNMHDR, LRESULT* pResult)
{
LPNMLVSCROLL pnmLVScroll = (LPNMLVSCROLL) pNMHDR;
m_MyListCtrl.OnEndScrolling();
*pResult = 0;
}
In the CListCtrl parent dialog. (which I don't want to do, I want to do everything in my CListCtrl derived class only, if possible).
All I accomplish is showing item 9 completely, but item 10 is partially visible below it. If I have 30 items I don't want to scroll the list to show item 30, I want to show up to item 8 with no partially visible item below it.
CListCtrl doesn't appear to support Integral Height.
Here's a solution that accomplishes what you desire by forcefully changing the control height [with commented conditions] (http://www.codeproject.com/Messages/418084/Socket-accept-call.aspx):
/////////////////////////////////////////////////////////////////////////////////
// This assumes a REPORT-style CListCtrl.
//
// Resize the control. This works correctly only if scrolling is disabled. If
// there is scrolling, then setting to the size from ApproximateViewRect() will
// always give scroll bars showing. Which is irritating.
//
// We need to adjust the vertical size from what ApproximateViewRect() returns
// by one row minus border width
//////////////////////////////////////////////////////////////////////////////////
CSize sz = m_list.ApproximateViewRect(); // always adds room for a new row
CRect itRect; // Get the height of a single row (there had better *be* a row!)
m_list.GetItemRect(0, &itRect, LVIR_BOUNDS);
int vOffset = itRect.Height() - 3; // leave a little 'cuz it looks better
m_list.SetWindowPos(NULL, 0, 0, sz.cx, sz.cy - vOffset,
SWP_NOZORDER|SWP_NOACTIVATE|SWP_NOMOVE);
I have the similar problem in wince, and find a solution accidentally. No direct solution in internet, so i decide to re-position scroll bar after receive some message, and the only message i can used in wince is WM_LBUTTONDOWN, other messages such as OnEndScroll are not called, maybe something wrong in my code.
Whatever, i use Timer（ON_WM_TIMER） to re-position scroll bar when receive WM_LBUTTONDOWN message, then find that list control doesn't scroll automatically! then i remain a empty OnTimer function and remove everything else. It works, and i guess list control use Timer to scroll partial row.
Hope useful to you.
Related
I am perplexed about the SizeToContent method of the CMFCMenuButton control.
This is my dialog in the IDE:
As you can see, I have specifically made the button wider than the two on the far right.
I added the following code to OnInitDialog:
// Resize (if required)
const auto sizNewButton = m_btnReset.SizeToContent(true);
CRect rctButton;
m_btnReset.GetWindowRect(&rctButton);
if(sizNewButton.cx > rctButton.Width())
{
m_btnReset.SizeToContent();
}
Yet, when I run my application in English:
It has made it smaller. My application supports 50+ languages by using satellite DLLs and I was hoping to only resize to content if it was required. But it seems to resize it anyway. Have I missed a step here?
I have checked the properties for the control in the IDE and it is not set to auto resize:
I notice that the help documentation states:
The new size of the button is calculated to fit the button text, image, and arrow. The framework also adds in predefined margins of 10 pixels for the horizontal edge and 5 pixels for the vertical edge.
I had a look at my button:
Default size: 48 x 23 (the GeWindowRect result).
Calculated size: 57 x 23 (the SizeToContent result).
If I adjusted my code like this:
if((sizNewButton.cx - 10) > rctButton.Width())
That would bring it down to 47 and thus would not resize. I am assuming the code is not working right because of the padded margin that GetWindowRect knows nothing about.
Searched it, and found that the problem is MFC's CMFCMenuButton::SizeToContent() implementation in afxmenubutton.cpp:
CSize CMFCMenuButton::SizeToContent(BOOL bCalcOnly)
{
CSize size = CMFCButton::SizeToContent(FALSE); // <==== The culprit!!!
size.cx += CMenuImages::Size().cx;
if (!bCalcOnly)
{
SetWindowPos(NULL, -1, -1, size.cx, size.cy, SWP_NOMOVE | SWP_NOACTIVATE | SWP_NOZORDER);
}
return size;
}
That is, it calls the base implementation of SizeToContent() with the bCalcOnly parameter set to FALSE, which means it will also resize the control to just fit the text (without the drop-down arrow). This is less than required for the text plus the arrow, and of course the original size is lost.
A workaround can be get the (original) width, before the SizeToContent() call, and work with this instead of the new one:
CRect rctButton;
m_btnReset.GetWindowRect(&rctButton);
const auto nOrigWidth = rctButton.Width(); // Store the original width
const auto sizNewButton = m_btnReset.SizeToContent(true); // This resizes the control!!!
if (sizNewButton.cx > nOrigWidth) // Compare to the original width rather than the new one
m_btnReset.SizeToContent();
else // Restore original width
m_btnReset.SetWindowPos(NULL, -1, -1, nOrigWidth, sizNewButton.cy, SWP_NOMOVE | SWP_NOACTIVATE | SWP_NOZORDER);
Alternative Workaround:
Define a new CMFCMenuButton-based class, overriding SizeToContent() - in the implementation call the base CMFCButton::SizeToContent() with the bCalcOnly parameter passed by the caller, not with FALSE. Map the control to this class instead of CMFCMenuButton. That is use a class that fixes it. Too much of an overkill for just a workaround though.
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.
My application supports over 30 languages:
What is the right way to manage the situation where the menu is too tall for the screen? I will slowly get extra languages added and I do not know how to cater for it.
The standard menu implementation provides the functionality to automatically add scrollbars, should the number of entries exceed the menu's maximum height. By default a popup menu's height is set to 0, instructing the system to use the screen height as the menu's maximum height.
This works for a number of scenarios, and you don't have to do anything to get that behavior. It does fail, though, for multimonitor setups, where the height of the primary display is larger than the height of the display, where the application is displayed.
To work around this, you can set the respective popup menu's maximum height, whenever it is displayed. The appropriate place would be CWnd::OnInitMenuPopup:
void CMainFrame::OnInitMenuPopup( CMenu* pPopupMenu, UINT nIndex, BOOL bSysMenu ) {
CFrameWnd::OnInitMenuPopup( pPopupMenu, nIndex, bSysMenu );
if ( !bSysMenu && ( nIndex == 3 ) ) { // Apply appropriate filter
MENUINFO mi = { 0 };
mi.cbSize = sizeof( mi );
mi.fMask = MIM_MAXHEIGHT;
mi.cyMax = 150; // Pick an appropriate value
pPopupMenu->SetMenuInfo( &mi );
}
}
This callback is called, whenever a popup menu is about to be displayed. The height has been arbitrarily set to 150. You can pick any value you see fit in your application (e.g. the minimum height of all displays, a value based on the height of the display, where the menu will be displayed, etc.).
Scrollbars are added automatically, as can be seen in the following screenshot:
There is a too long, didn't read version down below.
So I've been making a little game in which the player has to click on a grid of bricks that matches the color of the needed brick in the upper right hand corner of the screen. After they click on the needed color, the bricks explode and the bricks of the same color next to them explode as well creating combos. That leaves holes in the grid so I have to somehow reset the grid itself without resetting the gamestate itself. I've got something working right now which is this:
private function ResetNow():Void
{
if (Restter == 1) Restter = 0;
//if this block is up here, same results
/*
wantedBricks.kill();
wantedBrik._changeColor = FlxMath.rand(0, 2);
bricks.autoReviveMembers = true;
bricks.revive();
*/
Restter = 0;
//Removes stray detectors so the neverending combo bug won't occur
for (stray in dets.members) stray.kill();
if (Restter == 0)
{
wantedBricks.kill();
wantedBrik._changeColor = FlxMath.rand(0, 2);
bricks.autoReviveMembers = true;
bricks.revive();
wantedBricks.autoReviveMembers = true;
wantedBricks.revive();
for (zgem in bricks.members) zgem.EQUITYCHECK = FlxMath.rand(0, 2);
}
//add(bricks);
Restter = 1;
}
So, again, I have a grid of blocks set up at create, that is group bricks. And I have a sprite in the upper right corner which is wantedBrik. What happens during gameplay, is the player clicks on the bricks that matches the wanted bricks to clear them out of the grid. When there are no more wantedBricks(a group), it is supposed to reset the grid, and change the color of the wantedBrik. I also have it somewhere else in the code that if a member of the big grid's EQUITYCHECK(basic object hacked in value) is equal to the wantedBrik, add it to the wantedBricks(which, is why I'm checking for no more of them). So, what happens?
Well, if the color of the wantedBrik doesn't change, everything's fine and resets like normal. the wantedBricks group acurately counts the bricks that actually match the wantedBrik's color. And when it does change, for some reason, gameplay is normal. BUT, wantedBricks not only thinks that the old color is still needed, but it also thinks the new color is still needed too. So when the player clicks the new needed color bricks, they do explode, but because wantedBrik thinks the old color is still wanted, it doesn't hit null and the grid won't reset.
What can I do to make sure that wantedBricks behaves correctly after a color change?
TL;DR version: I need to get a Haxe array to forget or lose old numbers. How can I do this?
The "Pirate Pig" sample may be useful to you. Since it is a puzzle game, there may be some similar problems that were solved there. You can find it using openfl create or nme create depending on which you are currently using.
You can create a simple array like this:
var myArray = [];
You can also type arrays, like this:
var numbers = new Array<Float>();
Then you can use push(), concat() and other array methods.
I have a FlowLayoutPanel and a UserControl.
I've added multiple usercontrols into the FlowLayoutPanel, and I'm trying to dock them to the top, so when I change the size of the FlowLayoutPanel the size (width) of the usercontrols changes accordingly.
You cannot dock anything inside a FlowLayoutPanel, it's simply ignored.
Check out the answer here apparently posted by the Microsoft team.
They say:
The FlowLayoutPanel relies on a largest control to effectively define the column/row within it. The code below set's the size of the first control to the width of the FLP to achieve a layout similar to what you want.
private void flowLayoutPanel1_Layout(object sender, LayoutEventArgs e)
{
flowLayoutPanel1.Controls[0].Dock = DockStyle.None;
for (int i = 1; i < flowLayoutPanel1.Controls.Count; i++)
{
flowLayoutPanel1.Controls[i].Dock = DockStyle.Top;
}
flowLayoutPanel1.Controls[0].Width = flowLayoutPanel1.DisplayRectangle.Width - flowLayoutPanel1.Controls[0].Margin.Horizontal;
}
Key thing is to use the Layout event.
This solution worked for me up to a point. Your UserControls have to have AutoSize turned off / stay a uniform size.
In my case I wanted AutoSize turned on so as to allow the UserControl to expand/contract vertically while filling the width of the FlowLayoutPanel.
I had to find a different solution. But the above might help you in your case.