From c1547dd79ed4533a73c8bf4d2c3b4dadaefc8030 Mon Sep 17 00:00:00 2001 From: ocornut Date: Sun, 15 Mar 2015 01:47:12 +0000 Subject: [PATCH] Internal SliderBehaviour() function now supports vertical sliders --- imgui.cpp | 33 +++++++++++++++++++++------------ 1 file changed, 21 insertions(+), 12 deletions(-) diff --git a/imgui.cpp b/imgui.cpp index dbc7b251..bbc67c94 100644 --- a/imgui.cpp +++ b/imgui.cpp @@ -4735,7 +4735,7 @@ static void ParseFormat(const char* fmt, int& decimal_precision) } } -static bool SliderBehaviour(const ImGuiAabb& frame_bb, const ImGuiAabb& slider_bb, ImGuiID id, float* v, float v_min, float v_max, float power, int decimal_precision) +static bool SliderBehaviour(const ImGuiAabb& frame_bb, const ImGuiAabb& slider_bb, ImGuiID id, float* v, float v_min, float v_max, float power, int decimal_precision, bool horizontal) { ImGuiState& g = *GImGui; ImGuiWindow* window = GetCurrentWindow(); @@ -4747,15 +4747,15 @@ static bool SliderBehaviour(const ImGuiAabb& frame_bb, const ImGuiAabb& slider_b const bool is_finite = (v_min != -FLT_MAX && v_min != FLT_MAX && v_max != -FLT_MAX && v_max != FLT_MAX); const bool is_non_linear = abs(power - 1.0f) > 0.0001f; - const float slider_w = slider_bb.GetWidth(); - float grab_size_in_pixels; + const float slider_sz = horizontal ? slider_bb.GetWidth() : slider_bb.GetHeight(); + float grab_sz; if (decimal_precision > 0 || !is_finite) - grab_size_in_pixels = style.GrabMinSize; + grab_sz = style.GrabMinSize; else - grab_size_in_pixels = ImMax(1.0f * (slider_w / (v_max-v_min+1.0f)), style.GrabMinSize); // Integer sliders, if possible have the grab size represent 1 unit - 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; + grab_sz = ImMax(1.0f * (slider_sz / (v_max-v_min+1.0f)), style.GrabMinSize); // Integer sliders, if possible have the grab size represent 1 unit + const float slider_usable_sz = slider_sz - grab_sz; + const float slider_usable_pos_min = (horizontal ? slider_bb.Min.x : slider_bb.Min.y) + grab_sz*0.5f; + const float slider_usable_pos_max = (horizontal ? slider_bb.Max.x : slider_bb.Max.y) - grab_sz*0.5f; bool value_changed = false; @@ -4781,7 +4781,10 @@ static bool SliderBehaviour(const ImGuiAabb& frame_bb, const ImGuiAabb& slider_b { if (g.IO.MouseDown[0]) { - const float normalized_pos = ImClamp((g.IO.MousePos.x - slider_effective_x1) / slider_effective_w, 0.0f, 1.0f); + const float mouse_abs_pos = horizontal ? g.IO.MousePos.x : g.IO.MousePos.y; + float normalized_pos = ImClamp((mouse_abs_pos - slider_usable_pos_min) / slider_usable_sz, 0.0f, 1.0f); + if (!horizontal) + normalized_pos = 1.0f - normalized_pos; float new_value; if (is_non_linear) @@ -4857,8 +4860,14 @@ static bool SliderBehaviour(const ImGuiAabb& frame_bb, const ImGuiAabb& slider_b } // Draw - const float grab_x = ImLerp(slider_effective_x1, slider_effective_x2, grab_t); - const ImGuiAabb grab_bb(ImVec2(grab_x-grab_size_in_pixels*0.5f,frame_bb.Min.y+2.0f), ImVec2(grab_x+grab_size_in_pixels*0.5f,frame_bb.Max.y-2.0f)); + if (!horizontal) + grab_t = 1.0f - grab_t; + const float grab_pos = ImLerp(slider_usable_pos_min, slider_usable_pos_max, grab_t); + ImGuiAabb grab_bb; + if (horizontal) + grab_bb = ImGuiAabb(ImVec2(grab_pos - grab_sz*0.5f, frame_bb.Min.y + 2.0f), ImVec2(grab_pos + grab_sz*0.5f, frame_bb.Max.y - 2.0f)); + else + grab_bb = ImGuiAabb(ImVec2(frame_bb.Min.x + 2.0f, grab_pos - grab_sz*0.5f), ImVec2(frame_bb.Max.x - 2.0f, grab_pos + grab_sz*0.5f)); window->DrawList->AddRectFilled(grab_bb.Min, grab_bb.Max, window->Color(g.ActiveId == id ? ImGuiCol_SliderGrabActive : ImGuiCol_SliderGrab)); } @@ -4925,7 +4934,7 @@ bool ImGui::SliderFloat(const char* label, float* v, float v_min, float v_max, c ItemSize(bb); // Actual slider behavior + render grab - bool value_changed = SliderBehaviour(frame_bb, slider_bb, id, v, v_min, v_max, power, decimal_precision); + bool value_changed = SliderBehaviour(frame_bb, slider_bb, id, v, v_min, v_max, power, decimal_precision, true); // Display value using user-provided display format so user can add prefix/suffix/decorations to the value. char value_buf[64];