Any idea when horizontal scroll bar will be available? #246

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opened 2015-06-18 07:36:42 +00:00 by nikmes · 8 comments

nikmes commented

2015-06-18 07:36:42 +00:00

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ocornut commented

2015-06-18 14:43:25 +00:00

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I was actually looking into some of that recently.
It should be quite easy to add.

There's a few problems to take care of, e.g. some clipping optimisations for huge block of texts are skipping on text width calculation. Scrolling is easy and free but calculating accurate size to have a reference point of how big is the contents, can sometimes be costly.

I was actually looking into some of that recently. It should be quite easy to add. There's a few problems to take care of, e.g. some clipping optimisations for huge block of texts are skipping on text width calculation. Scrolling is easy and free but calculating accurate size to have a reference point of how big is the contents, can sometimes be costly.

ocornut commented

2015-07-20 00:55:08 +00:00

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Note that you can easily hack some form of manual scrolling (without scrollbar) by positioning the cursor.
e.g.

static float x = 0.0f;
if (ImGui::IsKeyDown(ImGui::GetKeyIndex(ImGuiKey_LeftArrow)))
    x -= ImGui::GetIO().DeltaTime * 1000.0f;
if (ImGui::IsKeyDown(ImGui::GetKeyIndex(ImGuiKey_RightArrow)))
    x += ImGui::GetIO().DeltaTime * 1000.0f;
ImGui::SetCursorPosX((float)(int)-x);
ImGui::BeginGroup();
...

Note that you can easily hack some form of manual scrolling (without scrollbar) by positioning the cursor. e.g. ``` cpp static float x = 0.0f; if (ImGui::IsKeyDown(ImGui::GetKeyIndex(ImGuiKey_LeftArrow))) x -= ImGui::GetIO().DeltaTime * 1000.0f; if (ImGui::IsKeyDown(ImGui::GetKeyIndex(ImGuiKey_RightArrow))) x += ImGui::GetIO().DeltaTime * 1000.0f; ImGui::SetCursorPosX((float)(int)-x); ImGui::BeginGroup(); ... ```

nikmes commented

2015-07-20 06:33:20 +00:00

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Thanks! I ll give it a try.

On 20 July 2015 at 03:55, omar notifications@github.com wrote:

Note that you can easily hack some form of manual scrolling by positioning
the cursor.
e.g.

static float x = 0.0f;if (ImGui::IsKeyDown(ImGui::GetKeyIndex(ImGuiKey_LeftArrow)))
x -= ImGui::GetIO().DeltaTime * 1000.0f;if (ImGui::IsKeyDown(ImGui::GetKeyIndex(ImGuiKey_RightArrow)))
x += ImGui::GetIO().DeltaTime * 1000.0f;ImGui::SetCursorPosX((float)(int)-x);ImGui::BeginGroup();
...

—
Reply to this email directly or view it on GitHub
https://github.com/ocornut/imgui/issues/246#issuecomment-122723424.

Best Regards
Nicholas Messaritis

Thanks! I ll give it a try. On 20 July 2015 at 03:55, omar notifications@github.com wrote: > Note that you can easily hack some form of manual scrolling by positioning > the cursor. > e.g. > > static float x = 0.0f;if (ImGui::IsKeyDown(ImGui::GetKeyIndex(ImGuiKey_LeftArrow))) > x -= ImGui::GetIO().DeltaTime \* 1000.0f;if (ImGui::IsKeyDown(ImGui::GetKeyIndex(ImGuiKey_RightArrow))) > x += ImGui::GetIO().DeltaTime \* 1000.0f;ImGui::SetCursorPosX((float)(int)-x);ImGui::BeginGroup(); > ... > > — > Reply to this email directly or view it on GitHub > https://github.com/ocornut/imgui/issues/246#issuecomment-122723424. ## Best Regards Nicholas Messaritis

ocornut commented

2015-08-30 17:45:32 +00:00

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OK pretty much done with that.
The horizontal scrollbar is always off by default and has to be enabled using ImGuiWindowFlags_HorizontalScrollbar.

You can call SetNextWindowContentWidth(width) before Begin() to specify a desired width.
The change had more side-effects than effects, had to change a few things but it may introduce new bugs.

OK pretty much done with that. The horizontal scrollbar is always off by default and has to be enabled using ImGuiWindowFlags_HorizontalScrollbar. You can call SetNextWindowContentWidth(width) before Begin() to specify a desired width. The change had more side-effects than effects, had to change a few things but it may introduce new bugs. ![horizontal_scrollbar](https://cloud.githubusercontent.com/assets/8225057/9568628/0f7fbbf6-4f47-11e5-9980-96fff3cb8151.gif) ![horizontal_scrollbar2](https://cloud.githubusercontent.com/assets/8225057/9568630/12adf78e-4f47-11e5-8795-a81784c18405.gif)

extrawurst commented

2015-08-30 17:47:29 +00:00

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@ocornut you are amazing... thank you!