ScopeSliderCtrl.cpp

#include "stdafx.h"
#include "ScopeSliderCtrl.h"
#include "helpers/Helpers.h"

namespace scope {
    namespace gui {

CScopeSliderCtrl::CScopeSliderCtrl(ScopeNumber<double>* _scopenum, const double& _increment, const bool& _connectback, const bool& _connectcontrolstate)
    : created(false)
    , scopenum(_scopenum)
    , increment(_increment)
    , scalefactor((increment!=0)?increment:(scopenum->ul()-scopenum->ll()) / 100)
    , offset(scopenum->ll())
    , rangehigh((increment!=0)?static_cast<int32_t>((scopenum->ul()-scopenum->ll())/increment):100)
    , rangelow(0) {
    if ( _connectback )
        valueconnection = scopenum->ConnectGUI(std::bind(&CScopeSliderCtrl::UpdateControl, this));
    if ( _connectcontrolstate )
        stateconnection = scopenum->ConnectState(std::bind(&CScopeSliderCtrl::SetState, this, std::placeholders::_1));
}

CScopeSliderCtrl::~CScopeSliderCtrl() {
    valueconnection.disconnect();
    stateconnection.disconnect();
}

BOOL CScopeSliderCtrl::AttachToDlgItem(HWND hWnd) {
    if ( SubclassWindow(hWnd) ) {
        created = true;
        SetRange(static_cast<int32_t>(rangelow), static_cast<int32_t>(rangehigh), TRUE);
        if ( increment == 0 )
            SetTicFreq(10);             // if not incrementing have only 10 ticks (although we have values from 0...100)
        UpdateControl();
        return TRUE;
    }
    return FALSE;
}

void CScopeSliderCtrl::OnScroll(UINT nSBCode, UINT nPos, CScrollBar pScrollBar) {
    // adjust scopenum on dragging the slider
    // nPos 0 at top, but bottom should be 0
    if ( nSBCode == SB_THUMBPOSITION )
        scopenum->Set(std::abs(static_cast<int32_t>(nPos)-rangehigh) * scalefactor + offset);
    // and on clicking into trackbar
    if ( (nSBCode == SB_PAGEUP) || (nSBCode == SB_PAGEDOWN) || (nSBCode == SB_PAGELEFT) || (nSBCode == SB_PAGERIGHT) )
        scopenum->Set(std::abs(GetPos()-rangehigh) * scalefactor + offset);
}

LRESULT CScopeSliderCtrl::OnKeyDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled) {
    switch (wParam) {
    case VK_RETURN:
    case VK_TAB:
        ::PostMessage(GetParent(), WM_NEXTDLGCTL, shiftstate, 0L);
        return FALSE;
    case VK_SHIFT:
        shiftstate = true;
    }
    return DefWindowProc(uMsg, wParam, lParam);
}

LRESULT CScopeSliderCtrl::OnKeyUp(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled) {
    switch (wParam) {
    case VK_SHIFT:
        shiftstate = false;
    }
    return DefWindowProc(uMsg, wParam, lParam);
}

LRESULT CScopeSliderCtrl::OnUpdateControl(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled) {
    // nPos 0 at top, but bottom should be 0
    SetPos(round2i32(abs((scopenum->Value()-offset)/scalefactor-rangehigh)));
    return 0;
}

void CScopeSliderCtrl::UpdateControl() {
    ::PostMessage(m_hWnd, WM_UPDATECONTROL, NULL, NULL);
}

void CScopeSliderCtrl::SetState(const bool& state) {
    if ( created )
        EnableWindow(state);
}

}

}