Home » Community » Newbie corner » App "swallowing" mouseclicks
| App "swallowing" mouseclicks [message #58779] |
Tue, 30 August 2022 06:21  |
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peterh
Messages: 108
Registered: November 2018
Location: Germany
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Experienced Member |
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Hi I compiled the tutorial sample "Gui21" "creating and using custom widgets".
It derives a widget from "Ctrl".
Just the code as a reminder:
struct MyCtrl : public Ctrl {
int count = 0;
virtual void Paint(Draw& w) override {
w.DrawRect(GetSize(), White());
w.DrawText(2, 2, AsString(count));
}
virtual void LeftDown(Point, dword) override {
count++;
Refresh();
}
};
I made then an experimental program, deriving not from "Ctrl", but deriving from "EditString".
Using this, I noticed, it does pretty often "swallow" mouseclicks, this means it does not react to them.
Then I tried the original code again and this "swallows" mouseclicks too, not so often but randomly about 1 out of 10 clicks.
It happens (reliably) both in debug and release mode.
I am on nightly build 16323, Win10 64 bit, using Clang 64 bit.
The computer is pretty fast, Ryzen 7 and CPU load in Task Manager is close to zero on all 16 cores.
Testproject code:
Main:
#include <CtrlLib/CtrlLib.h>
using namespace Upp;
struct MyCtrl : public EditString {
int count = 0;
virtual void Paint(Draw& w) override {
//w.DrawRect(GetSize(), White());
EditString::Paint(w);
w.DrawText(2, 2, AsString(count));
}
virtual void LeftDown(Point p, dword d) override {
count++;
//Refresh();
EditString::LeftDown(p,d);
}
};
#define LAYOUTFILE <Gui21/Gui21.lay>
#include <CtrlCore/lay.h>
struct Gui21 : public WithGui21Layout<TopWindow> {
Gui21();
};
Gui21::Gui21()
{
CtrlLayout(*this, "Window title");
}
GUI_APP_MAIN
{
Gui21().Run();
}
Ctrllib.usc
ctrl MyCtrl {
>EditString;
}
Gui21.lay
LAYOUT(Gui21Layout, 216, 144)
ITEM(MyCtrl, myctrl, Tip(t_("Test")).LeftPosZ(44, 120).TopPosZ(36, 52))
ITEM(Upp::EditString, dv___1, LeftPosZ(44, 64).TopPosZ(96, 19))
END_LAYOUT
It "swallows" fast mouseclick sequences preferrably.
Edit:
I believe, I know the reason: EditString "swallows" clicks, when it detects a double click.
[Updated on: Wed, 31 August 2022 13:25] Report message to a moderator |
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| Re: App "swallowing" mouseclicks [message #58790 is a reply to message #58789] |
Wed, 31 August 2022 19:20  |
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peterh
Messages: 108
Registered: November 2018
Location: Germany
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Experienced Member |
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Thank you. I do not think so. The mouse is about 1/2 year old and I do not see this with other applications.
Also the effect is dramatically reduced, if I do not derive from EditField, but from Ctrl or if I klick very slowly, e.g. in a 2 second distance. Maybe it vanishes completely then, I am not sure.
If I click as fast as I can, it swallows almost all clicks.
It is not very important for me. Finally I do not intend to override Leftdown, but other methods. I do this just for learning how to do it and to begin somewhere.
[Updated on: Wed, 31 August 2022 19:24] Report message to a moderator |
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| Re: App "swallowing" mouseclicks [message #58791 is a reply to message #58790] |
Wed, 31 August 2022 19:41 |
jjacksonRIAB
Messages: 220
Registered: June 2011
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Experienced Member |
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Just checked your example - yes, you are probably registering a double-click.
Try all three separately:
void LeftDouble(Point p, dword d) override {
count++;
EditString::LeftDouble(p, d);
}
void LeftDown(Point p, dword d) override {
count++;
EditString::LeftDown(p,d);
}
void LeftUp(Point p, dword d) override {
count++;
EditString::LeftUp(p, d);
}
If you just do LeftUp you'll probably see it works reliably. No events are being lost.
[Updated on: Wed, 31 August 2022 20:06] Report message to a moderator |
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