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Code Issues 33 Projects Packages Wiki Activity Actions

Doc, Tutorial: Fixed bug in GUI23 caused by uninitialized value.

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This commit is contained in:
Zbigniew Rębacz 2025-06-18 10:03:47 +02:00
parent 9c0dd92628
commit 157bb81739
2 changed files with 17 additions and 3 deletions
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9
tutorial/Gui23/main.cpp
View file

@ -3,7 +3,7 @@
using namespace Upp;
struct RandomRectCtrl : public Ctrl {
Rect rect;
Rect rect = Rect(Size(0, 0));
Color color;
void Paint(Draw& w) override {
@ -46,12 +46,17 @@ struct MyAppWindow : public WithMyAppLayout<TopWindow> {
if (random_rect_ctrl.rect.IsEmpty()) {
start_stop_btn.SetLabel("Stop!");
// When the user clicks the "Start" button, OnTimer() is immediately executed after
// all related events have been processed, to generate and display a random rectangle.
SetTimeCallback(0, [=] { OnTimer(); });
// Calls OnTimer() every two seconds to update the random position of a rectangle.
SetTimeCallback(-2000, [=] { OnTimer(); });
} else {
KillTimeCallback();
start_stop_btn.SetLabel("Start!");
random_rect_ctrl.rect = {};
random_rect_ctrl.rect.Clear();
random_rect_ctrl.Refresh();
}
}

11
uppsrc/CtrlLib/srcdoc.tpp/Tutorial_en-us.tpp
View file

@ -1775,7 +1775,7 @@ be achieved with the previously described methods.&]
[s0;l320;C%- &]
[s0;l320;%- [*C@(0.0.255) struct][C RandomRectCtrl ][C@(0.0.255) :][C ][*C@(0.0.255) public][C
Ctrl `{]&]
[s0;l320;%- [C Rect rect;]&]
[s0;l320;%- [C Rect rect ][C@(0.0.255) `=][C Rect(Size(][C@3 0][C , ][C@3 0][C ));]&]
[s0;l320;%- [C Color color;]&]
[s0;l320;%- [C ]&]
[s0;l320;%- [C ][*C@(0.0.255) void][C Paint(Draw][C@(0.0.255) `&][C w)
@ -1832,6 +1832,15 @@ upon Ctrl destruction.]&]
][C IsEmpty()) `{]&]
[s0;l320;%- [C start`_stop`_btn][C@(0.0.255) .][C SetLabel(][C@3 `"Stop!`"][C );]&]
[s0;l320;%- [C ]&]
[s0;l320;%- [C ][/C@4 // When the user clicks the `"Start`"
button, OnTimer() is immediately executed after]&]
[s0;l320;%- [C ][/C@4 // all related events have been processed,
to generate and display a random rectangle.]&]
[s0;l320;%- [C ][*_C SetTimeCallback(][*_C@3 0][*_C , ][*_C@(0.0.255) `[`=`]][*_C
`{ OnTimer(); `});]&]
[s0;l320;%- [C ]&]
[s0;l320;%- [C ][/C@4 // Calls OnTimer() every two seconds
to update the random position of a rectangle.]&]
[s0;l320;%- [C ][*_C SetTimeCallback(][*_C@(0.0.255) `-][*_C@3 2000][*_C ,
][*_C@(0.0.255) `[`=`]][*_C `{ OnTimer(); `});]&]
[s0;l320;%- [C `} ][*C@(0.0.255) else][C `{]&]