anulax
/
imgui-docking
1
0
Fork 0
Code Issues Pull Requests Packages project_board Releases Wiki Activity

Slider code tweaks, split into a SliderBehaviour() function

Browse Source
features/sdl_renderer3_multiviewports
ocornut ago%!(EXTRA string=10 years)
parent ce87c69c38
commit 1ef789bb68
1 changed files with 81 additions and 69 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 150
      imgui.cpp

150
imgui.cpp
Unescape View File

@ -4734,80 +4734,34 @@ static void ParseFormat(const char* fmt, int& decimal_precision)
}
}
// Use power!=1.0 for logarithmic sliders.
// Adjust display_format to decorate the value with a prefix or a suffix.
// "%.3f" 1.234
// "%5.2f secs" 01.23 secs
// "Gold: %.0f" Gold: 1
bool ImGui::SliderFloat(const char* label, float* v, float v_min, float v_max, const char* display_format, float power)
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)
{
ImGuiState& g = *GImGui;
ImGuiWindow* window = GetCurrentWindow();
if (window->SkipItems)
return false;
const ImGuiStyle& style = g.Style;
const ImGuiID id = window->GetID(label);
const float w = ImGui::CalcItemWidth();
const ImVec2 label_size = CalcTextSize(label, NULL, true);
const ImGuiAabb frame_bb(window->DC.CursorPos, window->DC.CursorPos + ImVec2(w, label_size.y) + style.FramePadding*2.0f);
const ImGuiAabb slider_bb(frame_bb.Min + style.FramePadding, frame_bb.Max - style.FramePadding);
const ImGuiAabb bb(frame_bb.Min, frame_bb.Max + ImVec2(label_size.x > 0.0f ? style.ItemInnerSpacing.x + label_size.x : 0.0f, 0.0f));
// NB- we don't call ItemSize() yet becausae we may turn into a text edit box later in the function
if (!ItemAdd(slider_bb, &id))
{
ItemSize(bb);
return false;
}
const bool hovered = IsHovered(slider_bb, id);
if (hovered)
g.HoveredId = id;
if (!display_format)
display_format = "%.3f";
int decimal_precision = 3;
ParseFormat(display_format, decimal_precision);
const bool tab_focus_requested = window->FocusItemRegister(g.ActiveId == id);
const bool is_unbound = (v_min == -FLT_MAX || v_min == FLT_MAX || v_max == -FLT_MAX || v_max == FLT_MAX);
bool start_text_input = false;
if (tab_focus_requested || (hovered && g.IO.MouseClicked[0]))
{
SetActiveId(id);
FocusWindow(window);
const bool is_ctrl_down = g.IO.KeyCtrl;
if (tab_focus_requested || is_ctrl_down || is_unbound)
{
start_text_input = true;
g.SliderAsInputTextId = 0;
}
}
// Tabbing or CTRL-clicking through slider turns into an input box
if (start_text_input || (g.ActiveId == id && id == g.SliderAsInputTextId))
return SliderFloatAsInputText(label, v, id, decimal_precision);
// Draw frame
RenderFrame(frame_bb.Min, frame_bb.Max, window->Color(ImGuiCol_FrameBg), true, style.FrameRounding);
ItemSize(bb);
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 grab_size_in_units = 1.0f; // In 'v' units. Probably needs to be parametrized, based on a 'v_step' value? decimal precision?
const float slider_w = slider_bb.GetWidth();
float grab_size_in_pixels;
if (decimal_precision > 0 || is_unbound)
if (decimal_precision > 0 || !is_finite)
grab_size_in_pixels = style.GrabMinSize;
else
grab_size_in_pixels = ImMax(grab_size_in_units * (w / (v_max-v_min+1.0f)), style.GrabMinSize); // Integer sliders
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;
// 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
if (!is_unbound)
bool value_changed = false;
if (is_finite)
{
// 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
if (v_min * v_max < 0.0f)
{
// Different sign
@ -4820,23 +4774,16 @@ bool ImGui::SliderFloat(const char* label, float* v, float v_min, float v_max, c
// Same sign
linear_zero_pos = v_min < 0.0f ? 1.0f : 0.0f;
}
}
RenderFrame(frame_bb.Min, frame_bb.Max, window->Color(ImGuiCol_FrameBg), true, style.FrameRounding);
const bool is_logarithmic = abs(power - 1.0f) > 0.0001f;
bool value_changed = false;
if (!is_unbound)
{
// Process clicking on the slider
if (g.ActiveId == id)
{
if (g.IO.MouseDown[0])
{
const float normalized_pos = ImClamp((g.IO.MousePos.x - slider_effective_x1) / slider_effective_w, 0.0f, 1.0f);
float new_value;
if (is_logarithmic)
if (is_non_linear)
{
// Account for logarithmic scale on both sides of the zero
if (normalized_pos < linear_zero_pos)
@ -4888,7 +4835,7 @@ bool ImGui::SliderFloat(const char* label, float* v, float v_min, float v_max, c
// Calculate slider grab positioning
float grab_t;
if (is_logarithmic)
if (is_non_linear)
{
float v_clamped = ImClamp(*v, v_min, v_max);
if (v_clamped < 0.0f)
@ -4914,6 +4861,71 @@ bool ImGui::SliderFloat(const char* label, float* v, float v_min, float v_max, c
window->DrawList->AddRectFilled(grab_bb.Min, grab_bb.Max, window->Color(g.ActiveId == id ? ImGuiCol_SliderGrabActive : ImGuiCol_SliderGrab));
}
return value_changed;
}
// Use power!=1.0 for logarithmic sliders.
// Adjust display_format to decorate the value with a prefix or a suffix.
// "%.3f" 1.234
// "%5.2f secs" 01.23 secs
// "Gold: %.0f" Gold: 1
bool ImGui::SliderFloat(const char* label, float* v, float v_min, float v_max, const char* display_format, float power)
{
ImGuiState& g = *GImGui;
ImGuiWindow* window = GetCurrentWindow();
if (window->SkipItems)
return false;
const ImGuiStyle& style = g.Style;
const ImGuiID id = window->GetID(label);
const float w = ImGui::CalcItemWidth();
const ImVec2 label_size = CalcTextSize(label, NULL, true);
const ImGuiAabb frame_bb(window->DC.CursorPos, window->DC.CursorPos + ImVec2(w, label_size.y) + style.FramePadding*2.0f);
const ImGuiAabb slider_bb(frame_bb.Min + style.FramePadding, frame_bb.Max - style.FramePadding);
const ImGuiAabb bb(frame_bb.Min, frame_bb.Max + ImVec2(label_size.x > 0.0f ? style.ItemInnerSpacing.x + label_size.x : 0.0f, 0.0f));
// NB- we don't call ItemSize() yet becausae we may turn into a text edit box below
if (!ItemAdd(slider_bb, &id))
{
ItemSize(bb);
return false;
}
const bool hovered = IsHovered(slider_bb, id);
if (hovered)
g.HoveredId = id;
if (!display_format)
display_format = "%.3f";
int decimal_precision = 3;
ParseFormat(display_format, decimal_precision);
const bool tab_focus_requested = window->FocusItemRegister(g.ActiveId == id);
const bool is_finite = (v_min != -FLT_MAX && v_min != FLT_MAX && v_max != -FLT_MAX && v_max != FLT_MAX);
// Tabbing or CTRL-clicking through slider turns into an input box
bool start_text_input = false;
if (tab_focus_requested || (hovered && g.IO.MouseClicked[0]))
{
SetActiveId(id);
FocusWindow(window);
const bool is_ctrl_down = g.IO.KeyCtrl;
if (tab_focus_requested || is_ctrl_down || !is_finite)
{
start_text_input = true;
g.SliderAsInputTextId = 0;
}
}
if (start_text_input || (g.ActiveId == id && id == g.SliderAsInputTextId))
return SliderFloatAsInputText(label, v, id, decimal_precision);
ItemSize(bb);
// Actual slider behavior + render grab
bool value_changed = SliderBehaviour(frame_bb, slider_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];
char* value_buf_end = value_buf + ImFormatString(value_buf, IM_ARRAYSIZE(value_buf), display_format, *v);

Write Preview
Loading…
Cancel
Save