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Refactor internal SliderBehavior() to take flags instead of a bool.

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This commit is contained in:
ocornut 2015-10-30 11:43:23 +01:00
parent 3eabad0321
commit 1a42a3f91b
2 changed files with 18 additions and 11 deletions
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21
imgui.cpp
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@ -5947,7 +5947,7 @@ float ImGui::RoundScalar(float value, int decimal_precision)
return negative ? -value : value;
}
bool ImGui::SliderBehavior(const ImRect& frame_bb, ImGuiID id, float* v, float v_min, float v_max, float power, int decimal_precision, bool horizontal)
bool ImGui::SliderBehavior(const ImRect& frame_bb, ImGuiID id, float* v, float v_min, float v_max, float power, int decimal_precision, ImGuiSliderFlags flags)
{
ImGuiState& g = *GImGui;
ImGuiWindow* window = GetCurrentWindow();
@ -5957,17 +5957,18 @@ bool ImGui::SliderBehavior(const ImRect& frame_bb, ImGuiID id, float* v, float v
RenderFrame(frame_bb.Min, frame_bb.Max, window->Color(ImGuiCol_FrameBg), true, style.FrameRounding);
const bool is_non_linear = fabsf(power - 1.0f) > 0.0001f;
const bool is_horizontal = (flags & ImGuiSliderFlags_Vertical) == 0;
const float grab_padding = 2.0f;
const float slider_sz = horizontal ? (frame_bb.GetWidth() - grab_padding * 2.0f) : (frame_bb.GetHeight() - grab_padding * 2.0f);
const float slider_sz = is_horizontal ? (frame_bb.GetWidth() - grab_padding * 2.0f) : (frame_bb.GetHeight() - grab_padding * 2.0f);
float grab_sz;
if (decimal_precision > 0)
grab_sz = ImMin(style.GrabMinSize, slider_sz);
else
grab_sz = ImMin(ImMax(1.0f * (slider_sz / (v_max-v_min+1.0f)), style.GrabMinSize), slider_sz); // 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 ? frame_bb.Min.x : frame_bb.Min.y) + grab_padding + grab_sz*0.5f;
const float slider_usable_pos_max = (horizontal ? frame_bb.Max.x : frame_bb.Max.y) - grab_padding - grab_sz*0.5f;
const float slider_usable_pos_min = (is_horizontal ? frame_bb.Min.x : frame_bb.Min.y) + grab_padding + grab_sz*0.5f;
const float slider_usable_pos_max = (is_horizontal ? frame_bb.Max.x : frame_bb.Max.y) - grab_padding - grab_sz*0.5f;
// For logarithmic sliders that cross over sign boundary we want the exponential increase to be symmetric around 0.0f
float linear_zero_pos = 0.0f; // 0.0->1.0f
@ -5990,9 +5991,9 @@ bool ImGui::SliderBehavior(const ImRect& frame_bb, ImGuiID id, float* v, float v
{
if (g.IO.MouseDown[0])
{
const float mouse_abs_pos = horizontal ? g.IO.MousePos.x : g.IO.MousePos.y;
const float mouse_abs_pos = is_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)
if (!is_horizontal)
normalized_pos = 1.0f - normalized_pos;
float new_value;
@ -6061,11 +6062,11 @@ bool ImGui::SliderBehavior(const ImRect& frame_bb, ImGuiID id, float* v, float v
}
// Draw
if (!horizontal)
if (!is_horizontal)
grab_t = 1.0f - grab_t;
const float grab_pos = ImLerp(slider_usable_pos_min, slider_usable_pos_max, grab_t);
ImRect grab_bb;
if (horizontal)
if (is_horizontal)
grab_bb = ImRect(ImVec2(grab_pos - grab_sz*0.5f, frame_bb.Min.y + grab_padding), ImVec2(grab_pos + grab_sz*0.5f, frame_bb.Max.y - grab_padding));
else
grab_bb = ImRect(ImVec2(frame_bb.Min.x + grab_padding, grab_pos - grab_sz*0.5f), ImVec2(frame_bb.Max.x - grab_padding, grab_pos + grab_sz*0.5f));
@ -6129,7 +6130,7 @@ bool ImGui::SliderFloat(const char* label, float* v, float v_min, float v_max, c
ItemSize(total_bb, style.FramePadding.y);
// Actual slider behavior + render grab
const bool value_changed = SliderBehavior(frame_bb, id, v, v_min, v_max, power, decimal_precision, true);
const bool value_changed = SliderBehavior(frame_bb, id, v, v_min, v_max, power, decimal_precision);
// Display value using user-provided display format so user can add prefix/suffix/decorations to the value.
char value_buf[64];
@ -6175,7 +6176,7 @@ bool ImGui::VSliderFloat(const char* label, const ImVec2& size, float* v, float
}
// Actual slider behavior + render grab
bool value_changed = SliderBehavior(frame_bb, id, v, v_min, v_max, power, decimal_precision, false);
bool value_changed = SliderBehavior(frame_bb, id, v, v_min, v_max, power, decimal_precision, ImGuiSliderFlags_Vertical);
// Display value using user-provided display format so user can add prefix/suffix/decorations to the value.
// For the vertical slider we allow centered text to overlap the frame padding

8
imgui_internal.h
View File

@ -39,6 +39,7 @@ struct ImGuiWindow;
typedef int ImGuiLayoutType; // enum ImGuiLayoutType_
typedef int ImGuiButtonFlags; // enum ImGuiButtonFlags_
typedef int ImGuiTreeNodeFlags; // enum ImGuiTreeNodeFlags_
typedef int ImGuiSliderFlags; // enum ImGuiSliderFlags_
//-------------------------------------------------------------------------
// STB libraries
@ -158,6 +159,11 @@ enum ImGuiTreeNodeFlags_
ImGuiTreeNodeFlags_NoAutoExpandOnLog = 1 << 1
};
enum ImGuiSliderFlags_
{
ImGuiSliderFlags_Vertical = 1 << 0,
};
enum ImGuiSelectableFlagsPrivate_
{
// NB: need to be in sync with last value of ImGuiSelectableFlags_
@ -677,7 +683,7 @@ namespace ImGui
IMGUI_API bool ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool* out_held, ImGuiButtonFlags flags = 0);
IMGUI_API bool ButtonEx(const char* label, const ImVec2& size_arg = ImVec2(0,0), ImGuiButtonFlags flags = 0);
IMGUI_API bool SliderBehavior(const ImRect& frame_bb, ImGuiID id, float* v, float v_min, float v_max, float power, int decimal_precision, bool horizontal);
IMGUI_API bool SliderBehavior(const ImRect& frame_bb, ImGuiID id, float* v, float v_min, float v_max, float power, int decimal_precision, ImGuiSliderFlags flags = 0);
IMGUI_API bool SliderFloatN(const char* label, float* v, int components, float v_min, float v_max, const char* display_format, float power);
IMGUI_API bool SliderIntN(const char* label, int* v, int components, int v_min, int v_max, const char* display_format);