lynnesbian/buypeeb-cs
lynnesbian/buypeeb-cs
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handle updates with a queue, display favourite status, removed status bar

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This commit is contained in:
Lynne Megido 2020-09-05 13:45:18 +10:00
parent 9c335a73d0
commit ce92a99723
Signed by: lynnesbian
GPG key ID: F0A184B5213D9F90
3 changed files with 71 additions and 74 deletions
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84
MainWindow.cs
View file

@ -28,23 +28,14 @@ using System.Diagnostics;
using Gtk;
namespace Buypeeb {
public struct ItemColumns {
public const int Name = 0;
public const int PriceYen = 1;
public const int PriceAUD = 2;
public const int Ending = 3;
public const int Id = 4;
}
class MainWindow : Window {
private string location;
// private Queue<string> statuses;
private ListStore items;
private Settings settings;
private TreeView itemTreeView;
private Label statusLabel;
private Builder builder;
// TODO: whenever we get something from the builder, cache it for later
@ -53,10 +44,12 @@ namespace Buypeeb {
private Box selectionViewBox;
private Label endingLabel;
private bool queueActive;
// ...to here.
static SemaphoreSlim taskLimit = new SemaphoreSlim(4);
static SemaphoreSlim taskLimit = new SemaphoreSlim(2);
private Queue<string> updateQueue = new Queue<string>();
private YahooAuctionsItem selectedItem {
get {
@ -104,7 +97,6 @@ namespace Buypeeb {
this.builder = builder;
builder.Autoconnect(this);
this.statusLabel = (Label)builder.GetObject("LabelStatus");
this.selectionViewBox = (Box)builder.GetObject("SelectionViewBox");
this.endingLabel = (Label)builder.GetObject("LabelSelectedEnding");
@ -115,6 +107,7 @@ namespace Buypeeb {
this.itemTreeView.Model = this.items;
TreeCellDataFunc[] funcs = {
new TreeCellDataFunc(this.RenderColumnFavourite),
new TreeCellDataFunc(this.RenderColumnName),
new TreeCellDataFunc(this.RenderColumnPriceYen),
new TreeCellDataFunc(this.RenderColumnPriceAUD),
@ -140,10 +133,6 @@ namespace Buypeeb {
// general behaviour
private void SetStatus(string status) {
this.statusLabel.Text = status ?? "Buypeeb";
}
private (TreePath path, TreeIter iter) GetRow(string id) {
// TODO: surely there's a better way to do this
TreeIter iter;
@ -179,7 +168,7 @@ namespace Buypeeb {
private void UpdateThread(string id) {
var item = this.settings.watchlist[id];
Console.WriteLine($"Updating {id}...");
// Console.WriteLine($"Updating {id}...");
// set item.ready to false to show that it's still being updated
// this changes a few behaviours, such as displaying the price as "..." instead of whatever's currently stored
item.ready = false;
@ -206,17 +195,31 @@ namespace Buypeeb {
});
item.ready = true;
Console.WriteLine($"{id} updated.");
// Console.WriteLine($"{id} updated.");
}
private void UpdateItem(string id, bool force = false) {
// don't start a new task if there are more than [tasklimit] tasks currently running
// this makes sure we don't make 1000 simultaneous requests to yahoo auctions if there are 1000 items on the watchlist
if (this.settings.watchlist[id].updatedRecently && !force) {
private void ProcessUpdateQueue() {
// recursively process the updatequeue
// this is a BLOCKING FUNCTION
this.queueActive = true;
this.UpdateItem(this.updateQueue.Dequeue());
if (this.updateQueue.TryPeek(out string _)) {
this.ProcessUpdateQueue();
}
else {
this.queueActive = false;
}
}
private void UpdateItem(string id, bool evenIfAlreadyUpdating = false, bool force = false) {
var item = this.settings.watchlist[id];
if (item.updatedRecently && !force) {
// the item has been updated recently, and force is not true
return;
}
// don't start a new task if there are more than `tasklimit` tasks currently running
// this makes sure we don't make 1000 simultaneous requests to yahoo auctions if there are 1000 items on the watchlist
taskLimit.Wait();
var t = Task.Factory.StartNew(() => {
this.UpdateThread(id);
@ -224,12 +227,28 @@ namespace Buypeeb {
}
private void UpdateItems() {
this.selectionViewBox.Sensitive = false;
var t = Task.Factory.StartNew(() => {
foreach (var item in this.settings.watchlist) {
this.UpdateItem(item.Key);
if (this.queueActive) {
return;
}
this.selectionViewBox.Sensitive = false;
foreach (var item in this.settings.watchlist) {
if (!this.updateQueue.Contains(item.Key)) {
// set everything to not ready first
// ensures other actions don't attempt to display the items even if UpdateItem hasn't started yet
item.Value.ready = false;
this.updateQueue.Enqueue(item.Key);
}
}
if (!this.updateQueue.TryPeek(out string _)) {
// queue is empty
return;
}
this.itemTreeView.QueueDraw();
var t = Task.Factory.StartNew(() => {
this.ProcessUpdateQueue();
});
}
@ -444,12 +463,20 @@ namespace Buypeeb {
private void ButtonSelectedUpdateClicked(object sender, EventArgs args) {
this.selectionViewBox.Sensitive = false;
if (this.updateQueue.Contains(this.selectedItem.id)) {
// the item is already waiting to be updated
return;
}
this.UpdateItem(this.selectedItem.id);
}
private void ButtonSelectedFavouriteToggled(object sender, EventArgs args) {
ToggleButton s = (ToggleButton)sender;
this.selectedItem.favourite = s.Active;
// i don't know why this is necessary
var pathAndIter = this.GetRow(this.selectedItem.id);
this.items.EmitRowChanged(pathAndIter.path, pathAndIter.iter);
}
// timers
@ -488,6 +515,11 @@ namespace Buypeeb {
// column renderers
private void RenderColumnFavourite(Gtk.TreeViewColumn column, Gtk.CellRenderer cell, Gtk.ITreeModel model, Gtk.TreeIter iter) {
YahooAuctionsItem item = (YahooAuctionsItem)model.GetValue(iter, 0);
(cell as Gtk.CellRendererText).Text = item.favourite ? "♥" : "";
}
private void RenderColumnName(Gtk.TreeViewColumn column, Gtk.CellRenderer cell, Gtk.ITreeModel model, Gtk.TreeIter iter) {
YahooAuctionsItem item = (YahooAuctionsItem)model.GetValue(iter, 0);
(cell as Gtk.CellRendererText).Text = item.name ?? "Loading...";

1
YahooAuctionsItem.cs
View file

@ -50,7 +50,6 @@ namespace Buypeeb {
public YahooAuctionsItem(string id, string name) {
this.id = id;
this.name = name;
this.ready = false;
}
public YahooAuctionsItem() {

60
ui/main.glade
View file

@ -1,14 +1,11 @@
<?xml version="1.0" encoding="UTF-8"?>
<!-- Generated with glade 3.22.2 -->
<!-- Generated with glade 3.36.0 -->
<interface>
<requires lib="gtk+" version="3.22"/>
<object class="GtkTextBuffer" id="TextBufferSelectedNotes"/>
<object class="GtkWindow" id="wndMain">
<property name="can_focus">False</property>
<property name="default_width">700</property>
<child type="titlebar">
<placeholder/>
</child>
<property name="default_width">810</property>
<child>
<object class="GtkBox">
<property name="visible">True</property>
@ -115,7 +112,6 @@
<child>
<object class="GtkToolButton" id="ButtonClearEnded">
<property name="visible">True</property>
<property name="sensitive">True</property>
<property name="can_focus">False</property>
<property name="tooltip_text" translatable="yes">Clear ended</property>
<property name="label" translatable="yes">Clear ended</property>
@ -172,7 +168,6 @@
<child>
<object class="GtkToolButton">
<property name="visible">True</property>
<property name="sensitive">True</property>
<property name="can_focus">False</property>
<property name="tooltip_text" translatable="yes">Save</property>
<property name="label" translatable="yes">Save</property>
@ -287,11 +282,19 @@
<signal name="changed" handler="TreeViewItemsSelectionChanged" swapped="no"/>
</object>
</child>
<child>
<object class="GtkTreeViewColumn">
<property name="title" translatable="yes">♥</property>
<child>
<object class="GtkCellRendererText"/>
</child>
</object>
</child>
<child>
<object class="GtkTreeViewColumn">
<property name="resizable">True</property>
<property name="sizing">fixed</property>
<property name="fixed_width">50</property>
<property name="fixed_width">100</property>
<property name="title" translatable="yes">Name</property>
<property name="expand">True</property>
<property name="clickable">True</property>
@ -807,47 +810,10 @@
<property name="position">1</property>
</packing>
</child>
<child>
<object class="GtkBox">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="margin_start">5</property>
<property name="margin_end">5</property>
<property name="margin_top">3</property>
<property name="margin_bottom">3</property>
<child>
<object class="GtkLabel" id="LabelStatus">
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="halign">start</property>
<property name="hexpand">True</property>
<property name="label" translatable="yes">Tracking 3 items</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">0</property>
</packing>
</child>
<child>
<object class="GtkSpinner">
<property name="visible">True</property>
<property name="can_focus">False</property>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">1</property>
</packing>
</child>
</object>
<packing>
<property name="expand">False</property>
<property name="fill">True</property>
<property name="position">2</property>
</packing>
</child>
</object>
<child type="titlebar">
<placeholder/>
</child>
</object>
</interface>