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Internals: DragBehavior: Added support for ImGuiDragFlags_Vertical to implement a vertical drag widget (no frontend function provided).

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This commit is contained in:
omar 2018-11-09 14:41:40 +01:00
parent 6d7677534f
commit 6c1ae6cc71
2 changed files with 25 additions and 13 deletions
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11
imgui_internal.h
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@ -63,6 +63,7 @@ typedef int ImGuiNavDirSourceFlags; // -> enum ImGuiNavDirSourceFlags_ // Flags:
typedef int ImGuiNavMoveFlags; // -> enum ImGuiNavMoveFlags_ // Flags: for navigation requests
typedef int ImGuiSeparatorFlags; // -> enum ImGuiSeparatorFlags_ // Flags: for Separator() - internal
typedef int ImGuiSliderFlags; // -> enum ImGuiSliderFlags_ // Flags: for SliderBehavior()
typedef int ImGuiDragFlags; // -> enum ImGuiDragFlags_ // Flags: for DragBehavior()
//-------------------------------------------------------------------------
// STB libraries
@ -249,6 +250,12 @@ enum ImGuiSliderFlags_
ImGuiSliderFlags_Vertical = 1 << 0
};
enum ImGuiDragFlags_
{
ImGuiDragFlags_None = 0,
ImGuiDragFlags_Vertical = 1 << 0
};
enum ImGuiColumnsFlags_
{
// Default: 0
@ -1246,7 +1253,7 @@ namespace ImGui
// Widgets low-level behaviors
IMGUI_API bool ButtonBehavior(const ImRect& bb, ImGuiID id, bool* out_hovered, bool* out_held, ImGuiButtonFlags flags = 0);
IMGUI_API bool DragBehavior(ImGuiID id, ImGuiDataType data_type, void* v, float v_speed, const void* v_min, const void* v_max, const char* format, float power);
IMGUI_API bool DragBehavior(ImGuiID id, ImGuiDataType data_type, void* v, float v_speed, const void* v_min, const void* v_max, const char* format, float power, ImGuiDragFlags flags);
IMGUI_API bool SliderBehavior(const ImRect& bb, ImGuiID id, ImGuiDataType data_type, void* v, const void* v_min, const void* v_max, const char* format, float power, ImGuiSliderFlags flags, ImRect* out_grab_bb);
IMGUI_API bool SplitterBehavior(const ImRect& bb, ImGuiID id, ImGuiAxis axis, float* size1, float* size2, float min_size1, float min_size2, float hover_extend = 0.0f, float hover_visibility_delay = 0.0f);
IMGUI_API bool TreeNodeBehavior(ImGuiID id, ImGuiTreeNodeFlags flags, const char* label, const char* label_end = NULL);
@ -1256,7 +1263,7 @@ namespace ImGui
// Template functions are instantiated in imgui_widgets.cpp for a finite number of types.
// To use them externally (for custom widget) you may need an "extern template" statement in your code in order to link to existing instances and silence Clang warnings (see #2036).
// e.g. " extern template IMGUI_API float RoundScalarWithFormatT<float, float>(const char* format, ImGuiDataType data_type, float v); "
template<typename T, typename SIGNED_T, typename FLOAT_T> IMGUI_API bool DragBehaviorT(ImGuiDataType data_type, T* v, float v_speed, const T v_min, const T v_max, const char* format, float power);
template<typename T, typename SIGNED_T, typename FLOAT_T> IMGUI_API bool DragBehaviorT(ImGuiDataType data_type, T* v, float v_speed, const T v_min, const T v_max, const char* format, float power, ImGuiDragFlags flags);
template<typename T, typename SIGNED_T, typename FLOAT_T> IMGUI_API bool SliderBehaviorT(const ImRect& bb, ImGuiID id, ImGuiDataType data_type, T* v, const T v_min, const T v_max, const char* format, float power, ImGuiSliderFlags flags, ImRect* out_grab_bb);
template<typename T, typename FLOAT_T> IMGUI_API float SliderCalcRatioFromValueT(ImGuiDataType data_type, T v, T v_min, T v_max, float power, float linear_zero_pos);
template<typename T, typename SIGNED_T> IMGUI_API T RoundScalarWithFormatT(const char* format, ImGuiDataType data_type, T v);

27
imgui_widgets.cpp
View File

@ -1706,9 +1706,10 @@ TYPE ImGui::RoundScalarWithFormatT(const char* format, ImGuiDataType data_type,
// This is called by DragBehavior() when the widget is active (held by mouse or being manipulated with Nav controls)
template<typename TYPE, typename SIGNEDTYPE, typename FLOATTYPE>
bool ImGui::DragBehaviorT(ImGuiDataType data_type, TYPE* v, float v_speed, const TYPE v_min, const TYPE v_max, const char* format, float power)
bool ImGui::DragBehaviorT(ImGuiDataType data_type, TYPE* v, float v_speed, const TYPE v_min, const TYPE v_max, const char* format, float power, ImGuiDragFlags flags)
{
ImGuiContext& g = *GImGui;
const ImGuiAxis axis = (flags & ImGuiDragFlags_Vertical) ? ImGuiAxis_Y : ImGuiAxis_X;
const bool is_decimal = (data_type == ImGuiDataType_Float) || (data_type == ImGuiDataType_Double);
const bool has_min_max = (v_min != v_max);
@ -1720,7 +1721,7 @@ bool ImGui::DragBehaviorT(ImGuiDataType data_type, TYPE* v, float v_speed, const
float adjust_delta = 0.0f;
if (g.ActiveIdSource == ImGuiInputSource_Mouse && IsMousePosValid() && g.IO.MouseDragMaxDistanceSqr[0] > 1.0f*1.0f)
{
adjust_delta = g.IO.MouseDelta.x;
adjust_delta = g.IO.MouseDelta[axis];
if (g.IO.KeyAlt)
adjust_delta *= 1.0f / 100.0f;
if (g.IO.KeyShift)
@ -1729,11 +1730,15 @@ bool ImGui::DragBehaviorT(ImGuiDataType data_type, TYPE* v, float v_speed, const
else if (g.ActiveIdSource == ImGuiInputSource_Nav)
{
int decimal_precision = is_decimal ? ImParseFormatPrecision(format, 3) : 0;
adjust_delta = GetNavInputAmount2d(ImGuiNavDirSourceFlags_Keyboard | ImGuiNavDirSourceFlags_PadDPad, ImGuiInputReadMode_RepeatFast, 1.0f / 10.0f, 10.0f).x;
adjust_delta = GetNavInputAmount2d(ImGuiNavDirSourceFlags_Keyboard | ImGuiNavDirSourceFlags_PadDPad, ImGuiInputReadMode_RepeatFast, 1.0f / 10.0f, 10.0f)[axis];
v_speed = ImMax(v_speed, GetMinimumStepAtDecimalPrecision(decimal_precision));
}
adjust_delta *= v_speed;
// For vertical drag we currently assume that Up=higher value (like we do with vertical sliders). This may become a parameter.
if (axis == ImGuiAxis_Y)
adjust_delta = -adjust_delta;
// Clear current value on activation
// Avoid altering values and clamping when we are _already_ past the limits and heading in the same direction, so e.g. if range is 0..255, current value is 300 and we are pushing to the right side, keep the 300.
bool is_just_activated = g.ActiveIdIsJustActivated;
@ -1804,7 +1809,7 @@ bool ImGui::DragBehaviorT(ImGuiDataType data_type, TYPE* v, float v_speed, const
return true;
}
bool ImGui::DragBehavior(ImGuiID id, ImGuiDataType data_type, void* v, float v_speed, const void* v_min, const void* v_max, const char* format, float power)
bool ImGui::DragBehavior(ImGuiID id, ImGuiDataType data_type, void* v, float v_speed, const void* v_min, const void* v_max, const char* format, float power, ImGuiDragFlags flags)
{
ImGuiContext& g = *GImGui;
if (g.ActiveId == id)
@ -1819,12 +1824,12 @@ bool ImGui::DragBehavior(ImGuiID id, ImGuiDataType data_type, void* v, float v_s
switch (data_type)
{
case ImGuiDataType_S32: return DragBehaviorT<ImS32, ImS32, float >(data_type, (ImS32*)v, v_speed, v_min ? *(const ImS32* )v_min : IM_S32_MIN, v_max ? *(const ImS32* )v_max : IM_S32_MAX, format, power);
case ImGuiDataType_U32: return DragBehaviorT<ImU32, ImS32, float >(data_type, (ImU32*)v, v_speed, v_min ? *(const ImU32* )v_min : IM_U32_MIN, v_max ? *(const ImU32* )v_max : IM_U32_MAX, format, power);
case ImGuiDataType_S64: return DragBehaviorT<ImS64, ImS64, double>(data_type, (ImS64*)v, v_speed, v_min ? *(const ImS64* )v_min : IM_S64_MIN, v_max ? *(const ImS64* )v_max : IM_S64_MAX, format, power);
case ImGuiDataType_U64: return DragBehaviorT<ImU64, ImS64, double>(data_type, (ImU64*)v, v_speed, v_min ? *(const ImU64* )v_min : IM_U64_MIN, v_max ? *(const ImU64* )v_max : IM_U64_MAX, format, power);
case ImGuiDataType_Float: return DragBehaviorT<float, float, float >(data_type, (float*)v, v_speed, v_min ? *(const float* )v_min : -FLT_MAX, v_max ? *(const float* )v_max : FLT_MAX, format, power);
case ImGuiDataType_Double: return DragBehaviorT<double,double,double>(data_type, (double*)v, v_speed, v_min ? *(const double*)v_min : -DBL_MAX, v_max ? *(const double*)v_max : DBL_MAX, format, power);
case ImGuiDataType_S32: return DragBehaviorT<ImS32, ImS32, float >(data_type, (ImS32*)v, v_speed, v_min ? *(const ImS32* )v_min : IM_S32_MIN, v_max ? *(const ImS32* )v_max : IM_S32_MAX, format, power, flags);
case ImGuiDataType_U32: return DragBehaviorT<ImU32, ImS32, float >(data_type, (ImU32*)v, v_speed, v_min ? *(const ImU32* )v_min : IM_U32_MIN, v_max ? *(const ImU32* )v_max : IM_U32_MAX, format, power, flags);
case ImGuiDataType_S64: return DragBehaviorT<ImS64, ImS64, double>(data_type, (ImS64*)v, v_speed, v_min ? *(const ImS64* )v_min : IM_S64_MIN, v_max ? *(const ImS64* )v_max : IM_S64_MAX, format, power, flags);
case ImGuiDataType_U64: return DragBehaviorT<ImU64, ImS64, double>(data_type, (ImU64*)v, v_speed, v_min ? *(const ImU64* )v_min : IM_U64_MIN, v_max ? *(const ImU64* )v_max : IM_U64_MAX, format, power, flags);
case ImGuiDataType_Float: return DragBehaviorT<float, float, float >(data_type, (float*)v, v_speed, v_min ? *(const float* )v_min : -FLT_MAX, v_max ? *(const float* )v_max : FLT_MAX, format, power, flags);
case ImGuiDataType_Double: return DragBehaviorT<double,double,double>(data_type, (double*)v, v_speed, v_min ? *(const double*)v_min : -DBL_MAX, v_max ? *(const double*)v_max : DBL_MAX, format, power, flags);
case ImGuiDataType_COUNT: break;
}
IM_ASSERT(0);
@ -1889,7 +1894,7 @@ bool ImGui::DragScalar(const char* label, ImGuiDataType data_type, void* v, floa
// Actual drag behavior
ItemSize(total_bb, style.FramePadding.y);
const bool value_changed = DragBehavior(id, data_type, v, v_speed, v_min, v_max, format, power);
const bool value_changed = DragBehavior(id, data_type, v, v_speed, v_min, v_max, format, power, ImGuiDragFlags_None);
if (value_changed)
MarkItemEdited(id);