model-view

问题 I implemented a custom QAbstractTableModel and I'm using a std::vector for my data objects. Now I wanted to implement the sort() method, to get my table sorted by column. That's basically what I do: void SBStateTableModel::sort (int column, Qt::SortOrder order) { emit layoutAboutToBeChanged(); switch (column) { case Address: if (order == Qt::DescendingOrder) std::sort(states.begin(), states.end(), addr_comp_desc); else std::sort(states.begin(), states.end(), addr_comp_asc); default: return; }

问题 I have a form that uses a modelview object that is not updating a textbox value on postback of submitting a form. On submitting a form, I edit the property of an object that is binded to a textbox. When the form comes back, the object property is still changed, but the textbox value does not change. It's like the textbox value is cached and will not change. How do I fix this? Textbox default value: "" Textbox code: @Html.TextBoxFor(m => m.Project.tNumber, new { @readonly = "readonly", @class

问题 I wish to update my listview in an elegant way. This is my code: ObservableCollection<Track> tracks = new ObservableCollection<Track>(); Track track = new Track(); Tracks.AddRange(track); // collection add a track, and list view updates too Task.Factory.StartNew(() => track.GetInfo(); // this operation might require some times to update // here I need to notify that my object is updated ); How i can force to update binding of an object inside my ObservableCollection ? This is my userControl

问题 I have a strongly typed view of type ProductListingViewModel which in turn contains a ProductViewModel. (both custom view models). I have some form elements on my page and these are created like so: <%: Html.DropDownListFor(m => m.ProductViewModel.CategoryId, Model.Categories)%> which generates the HTML: <select name="ProductViewModel.CategoryId" id="CategoryId"> With the default model binding I expected that when I post to my controller action which accepts a parameter of type

问题 I have two modalviews - MyModalViewA (parent) and MyModalViewB (child). MyModalViewA spawns MyModalViewB , as custom binding, as well has observable array which I need to update. And it looks like: (function () { 'use strict'; var window = __webpack_require__(/*! window */ 10), _ = __webpack_require__(/*! _ */ 2), $ = __webpack_require__(/*! $ */ 12), ko = __webpack_require__(/*! ko */ 3), key = __webpack_require__(/*! key */ 16), Enums = __webpack_require__(/*! Common/Enums */ 4), Utils = _

问题 I saw the same question in stack but they try to fix the error with the @ContributesAndroidInjector but in Dagger documentation says use @ContributesAndroidInjector is only optional, so here are my classes: My MainActivityComponent : @Subcomponent(modules = [ MainBuilder::class ]) @ActivityScope interface MainComponent: AndroidInjector<MainActivity>{ @Subcomponent.Factory interface Factory: AndroidInjector.Factory<MainActivity> } My AplicationBinder : @Module(subcomponents = [ MainComponent:

问题 I'm trying to design an MV (Model-ViewController) application in Java swing. I'm having trouble with assigning the correct model to each ViewController. Here's my current design (not the actual names) : The idea is that I have two views : the Gui and a Midi Device. Each view has its corresponding model. However, a part of the Gui (ButtonBar) needs to access the midi device model. For now, my solution is to pass the MidiDevice model to the MainWindow's constructor, then let it pass it down to

问题 I am desperately trying to figure out how the QDataWidgetMapper works. Therefore, I wrote a small demo application with a custom model derived from QAbstractTableModel . If I run the application, I would assume, that I get the following output: Firstname: Walter Surname: Pinkman However, I get: Firstname: Jesse Surname: Pinkman What am I missing? I also tried to change the orientation-property of QDataWidgetMapper , but then I get: Firstname: White Surname: Pinkman example: #!/usr/bin/env

问题 Assume I have a tree structure (tree leaves in bold , sorry for the dots): A A1 A2 B B1 B11 B2 C stored in a QAbstractItemModel (with set parent/child relations). How to display only the tree leaves in a QTableView? Basic idea was to implement a QSortFilterProxyModel. Intuition suggested there would be a way to iterate through the tree and return a valid index if the item is a leaf, or QModelIndex() if not. // QAbstractItemModel *model; m_leavesModel.setSourceModel(model); //

问题 I have problems implementing Qt tree model with lazy loading using canFetchMore() and fetchMore() . I have this code: from PySide.QtCore import Qt, QAbstractItemModel, QModelIndex from PySide.QtWidgets import QTreeView, QApplication BATCH_SIZE = 100 class ObjectItem(object): def __init__(self, parent, name, data, row): self.parent = parent self.name = name self.data = data self.row = row self.hasChildren = False self.canFetchMore = False # ints have no children if isinstance(data, int):