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Scrollbar grab have a minimum size (mentioned in #150)

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This commit is contained in:
ocornut 2015-03-08 11:24:02 +00:00
parent e843539aab
commit ede45389f4
1 changed files with 10 additions and 11 deletions
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19
imgui.cpp
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@ -263,7 +263,6 @@
- main: IsItemHovered() make it more consistent for various type of widgets, widgets with multiple components, etc. also effectively IsHovered() region sometimes differs from hot region, e.g tree nodes
- main: IsItemHovered() info stored in a stack? so that 'if TreeNode() { Text; TreePop; } if IsHovered' return the hover state of the TreeNode?
- scrollbar: use relative mouse movement when first-clicking inside of scroll grab box.
- scrollbar: make the grab visible and a minimum size for long scroll regions
!- input number: very large int not reliably supported because of int<>float conversions.
- input number: optional range min/max for Input*() functions
- input number: holding [-]/[+] buttons could increase the step speed non-linearly (or user-controlled)
@ -3014,35 +3013,35 @@ bool ImGui::Begin(const char* name, bool* p_opened, const ImVec2& size, float bg
if (window->ScrollbarY)
{
ImGuiAabb scrollbar_bb(window->Aabb().Max.x - style.ScrollBarWidth, title_bar_aabb.Max.y+1, window->Aabb().Max.x, window->Aabb().Max.y-1);
//window->DrawList->AddLine(scrollbar_bb.GetTL(), scrollbar_bb.GetBL(), g.Colors[ImGuiCol_Border]);
window->DrawList->AddRectFilled(scrollbar_bb.Min, scrollbar_bb.Max, window->Color(ImGuiCol_ScrollbarBg));
scrollbar_bb.Expand(ImVec2(-3,-3));
const float scrollbar_height = scrollbar_bb.GetHeight();
const float grab_size_y_norm = ImSaturate(window->Size.y / ImMax(window->SizeContentsFit.y, window->Size.y));
const float grab_size_y = scrollbar_bb.GetHeight() * grab_size_y_norm;
const float grab_size_y_pixels = ImMax(10.0f, scrollbar_height * grab_size_y_norm);
// Handle input right away (none of the code above is relying on scrolling position)
bool held = false;
bool hovered = false;
if (grab_size_y_norm < 1.0f)
if (grab_size_y_pixels < scrollbar_height)
{
const ImGuiID scrollbar_id = window->GetID("#SCROLLY");
ButtonBehaviour(scrollbar_bb, scrollbar_id, &hovered, &held, true);
if (held)
{
g.HoveredId = scrollbar_id;
const float pos_y_norm = ImSaturate((g.IO.MousePos.y - (scrollbar_bb.Min.y + grab_size_y*0.5f)) / (scrollbar_bb.GetHeight() - grab_size_y)) * (1.0f - grab_size_y_norm);
window->ScrollY = (float)(int)(pos_y_norm * window->SizeContentsFit.y);
const float pos_y_norm = ImSaturate((g.IO.MousePos.y - (scrollbar_bb.Min.y + grab_size_y_pixels*0.5f)) / (scrollbar_height - grab_size_y_pixels));
window->ScrollY = (float)(int)(pos_y_norm * (window->SizeContentsFit.y - window->Size.y));
window->NextScrollY = window->ScrollY;
}
}
// Normalized height of the grab
const float pos_y_norm = ImSaturate(window->ScrollY / ImMax(0.0f, window->SizeContentsFit.y));
const float pos_y_norm = ImSaturate(window->ScrollY / ImMax(0.0f, window->SizeContentsFit.y - window->Size.y));
const ImU32 grab_col = window->Color(held ? ImGuiCol_ScrollbarGrabActive : hovered ? ImGuiCol_ScrollbarGrabHovered : ImGuiCol_ScrollbarGrab);
window->DrawList->AddRectFilled(
ImVec2(scrollbar_bb.Min.x, ImLerp(scrollbar_bb.Min.y, scrollbar_bb.Max.y, pos_y_norm)),
ImVec2(scrollbar_bb.Max.x, ImLerp(scrollbar_bb.Min.y, scrollbar_bb.Max.y, pos_y_norm + grab_size_y_norm)), grab_col);
ImVec2(scrollbar_bb.Min.x, ImLerp(scrollbar_bb.Min.y, scrollbar_bb.Max.y - grab_size_y_pixels, pos_y_norm)),
ImVec2(scrollbar_bb.Max.x, ImLerp(scrollbar_bb.Min.y, scrollbar_bb.Max.y - grab_size_y_pixels, pos_y_norm) + grab_size_y_pixels), grab_col);
}
// Render resize grip
@ -4637,7 +4636,7 @@ bool ImGui::SliderFloat(const char* label, float* v, float v_min, float v_max, c
if (decimal_precision > 0 || is_unbound)
grab_size_in_pixels = 10.0f;
else
grab_size_in_pixels = ImMax(grab_size_in_units * (w / (v_max-v_min+1.0f)), 8.0f); // Integer sliders
grab_size_in_pixels = ImMax(grab_size_in_units * (w / (v_max-v_min+1.0f)), 10.0f); // Integer sliders
const float slider_effective_w = slider_bb.GetWidth() - grab_size_in_pixels;
const float slider_effective_x1 = slider_bb.Min.x + grab_size_in_pixels*0.5f;
const float slider_effective_x2 = slider_bb.Max.x - grab_size_in_pixels*0.5f;