I currently have a list<float> that are arranged in an increasing order. My sliders min.value is the lowest value of my list (i.e. first element of my list) and sliders max.value is equal to the last item of my list.
What I want to do is that whenever my slider is at a specific value or +-0.1 to one of the elements on my list, I Want to be able to get the index out that specific element to perform a task.
Any suggestions?
Someone asked for code, I don't even like this code since it only gives me the right value once I press "play" from zero, but then it removes my data, so I can't go back with the slider
this code is inside update void, and isPlaying is true when I press a "play" button
if(isPlaying){
timeSlider.value += Time.deltaTime;
timer = timeSlider.value;
print(timeSlider.value);
if((newTimes[0]>=(timer-0.1f)) && (newTimes[0]<=(timer+0.1f))){
print("time: " + newTimes[0]+ " at run time: " + timer);
NewTimes.RemoveAt(0);
}
}
You can set the slider to use whole numbers in the inspector and use the value as your index?
My first thought would be:
Set Slider Steps to Floats in your List
-> Perform task on List[currentSliderStep] as needed
Related
I'm making a sort of an Excel-type application in which I can load a tab-delimited text file and I am able to edit cells... etc
It's useable but I have an issue related to me allowing the user to "freeze" a number of columns/rows. ("Frozen" rows/columns can only be one of the first ones and are then "frozen", i.e. always displayed even when scrolling)
The whole frozen Col/Row is working but I would like the user to be able to scroll slightly past the last Col/Row in order to be able to only ever display full cells.
Right now when reaching the end of the scrollbar I end up with a partial leftmost column and topmost row because it's only displaying up to the last full col/row and not going a wee bit further for all content to be displayed fully.
I've tried doing adding some space to the maximum scrollbar value once everything is loaded in the table but it seems to have no effect :
table->horizontalScrollBar()->setMaximum(table->horizontalScrollBar()->maximum() + t->horizontalScrollBar()->singleStep()*2);
I tried multiple values too.
(Edit) There may be some Qt code that "snaps" the QTableView viewport back to the edge of the last cell automatically...
(Edit2) I connected verticalScrollbar's rangeChanged() signal to a custom slot with the following code:
void MyTableView::onRangeChanged(int min, int max) {
QScrollBar *sender = verticalScrollBar();
int newVMax = max + 20;
sender->blockSignals(true);
sender->setRange(min, newVMax);
sender->blockSignals(false);
}
Sadly there is definitely a snapback mechanic when scrolling to the end of verticalScrollbar...
Gif of snap back issue
(Edit3) The snap back may be related to:
void QHeaderViewPrivate::setScrollOffset(const QScrollBar *scrollBar, QAbstractItemView::ScrollMode scrollMode)
{
Q_Q(QHeaderView);
if (scrollMode == QAbstractItemView::ScrollPerItem) {
if (scrollBar->maximum() > 0 && scrollBar->value() == scrollBar->maximum())
q->setOffsetToLastSection();
else
q->setOffsetToSectionPosition(scrollBar->value());
} else {
q->setOffset(scrollBar->value());
}
}
mainly:
if (scrollBar->maximum() > 0 && scrollBar->value() == scrollBar->maximum())
q->setOffsetToLastSection();
" Select list item: Attempt to get item number 0, of the list [5]. The minimum valid item number is 1.
Note: You will not see another error reported for 5 seconds. "
Hey Guys,
The message on top appear when the app open the app not crashing but I need to click somewhere on screen few times till it disappear..
The idea is to search a value of var 'UID' in firebase.database and when it found it I need to get the value of is brother key..
I want you please to help me to clear this message I tried a few ways to get the result but nothing yet..
Thanks a lot for helpers :)
When Screen Open.
This is how I tried to get the uid && employeeKey.
for your help me I set var 'UID' = to uid value of employee number 1
'UID' get the value from firebase.auth form on screen 1..
The index in list block returns 0, if the "thing" has not been found in the list and in this case you are trying to get the value from the 0th item from the empKey list, which does not make sense.
Therefore you will have to add an if statement... if the returned index is 0, then do not search for the empKey.
Btw. the better place to ask questions like this would be the MIT App Inventor community...
I currently have a v-autocomplete component but once the user clicks the search it expands and shows all available items. I want the list of items to only display once there is input. There are too many available items and don't want the user seeing all of them right off the bat. Also if there is a way to limit it to only showing the top 5 that match the user input.
<v-autocomplete class="vtext"
v-model="selectedTopic"
:items="getTopics"
item-text="Name"
item-value="Id"
:outlined="false"
:rounded="true"
:solo="true"
:single-line="true"
append-icon='fa fa-search'
#change="topicSelected()"
:hide-no-data="true"
:allow-overflow="false"
no-data-text="No topic found"
return-object
>
</v-autocomplete>
The reason it shows all items on initialization (when clicking empty), is because you are setting the items right away with getTopics what you need to do in that function is check
<v-autocomplete class="vtext"
...
#input="handleInput"
if (inputModel){ //get the topics}
else { return []}
In terms of only getting the first 5 results, again you do it in the same function:
if (inputModel){
// do search
return results.slice(0,5)}
I have 3 picture boxes added on my Visual Basic and I have one button
essentially i want the button to display the next image when its pressed and to hide the previous image (all images are set to invisible on startup)
i've tried to do stuff like
If pic1.visible then
pic2.visible = true
pic3.visible = true
else
pic 1 .visible = true
end if
etc etc
Instead of basing your if-statement logic on the visibility of other images, I would suggest to create a counter that will keep track of the active image.
To keep it simple, have the counter loop between 1, 2 and 3 (i.e. clicking the button 4 times would make the counter == 1). Then simply have your if-statement logic based on the current value of the counter.
For instance:
if (counter == 1) {
pic1.show();
pic2.hide();
pic3.hide();
} else if (counter == 2) {
...
}
You can use switch statements if you'd like but I think this should give you a general idea.
I have created a shell extension for windows with COM, however I seem to fail to properly match the ids of items I add in the overload of IContextMenu::QueryContextMenu with what I receive in the overload of IContextMenu::InvokeCommand. In my code I use InsertMenu and InsertMenuItem (as far as I understood they do the same, but the latter has some more features?). However I'm not sure which arguments passed to InsertMenu/InsertMenuItem correspond to what I must be looking for in LPCMINVOKECOMMANDINFO::lpVerb. I need some way to easily know that when I add items x, y, z to a context menu, I can then know exactly which one of x, y or z has been clicked.
EDIT: It seems that the verb equals the number from top to bottom of the item in the current menu/submenu. However I have two sub-menus each with x amount of items, so they have the same IDs of 1,2,3. How do I set custom IDs or something?
Firstly you should define an enum that holds the command IDs for your menu items, e.g.
enum {
CMDID_FIRST = 0,
CMDID_DOSOMETHING = CMDID_FIRST,
CMDID_DOSOMETHINGELSE,
CMDID_LAST,
};
These ID values need to start from 0.
In your IContextMenu::QueryContextMenu implementation:
when you add your menu items you need to give each of them an ID by setting the MIIM_ID flag in the MENUITEMINFO.fMask field, and setting the MENUITEMINFO.wID value.
give each of your menu items an ID derived from its command ID as defined above, plus the value of idCmdFirst which is passed into QueryContextMenu. E.g. the "Do Something" menu item would have MENUITEMINFO.wID set to idCmdFirst + CMDID_DOSOMETHING, and "Do Something Else" would have MENUITEMINFO.wID set to idCmdFirst + CMDID_DOSOMETHINGELSE.
the return value from QueryContextMenu needs to be MAKE_HRESULT(SEVERITY_SUCCESS, FACILITY_NULL, x) where x is the ID of the highest-numbered item you added plus 1 (alternatively, if all items were sequentially numbered, the total number of items). Basically, you're telling the host which menu item ID values are now in use so that no other context menu extensions add items that clash with yours. In the above example, you'd return MAKE_HRESULT(SEVERITY_SUCCESS, FACILITY_NULL, CMDID_LAST).
In IContextMenu::InvokeCommand:
test if lpVerb (or lpVerbW) is an integer value using the IS_INTRESOURCE macro.
if so, the command ID can be found in the low word. E.g, if the user selected "Do Something Else", you would find that LOWORD(lpVerb) == CMDID_DOSOMETHINGELSE.